Cadillac | Prevent Northstar engine from Overheating | What Mechanics won't tell you

Here are some things about your Cadillac and what you should do to prevent Overheating and solve diagnose, repair, prevent your 1998 Cadillac Northstar GM engine GMC from overheating or leaking. Don't wait for your check engine light to come on, or when your luxury sedan gets hot. If you don’t have extended car warranty, car maintenance insurance, you’ll have to do the maintenance yourself. Some of them are basic, but some of them your mechanic won't tell you. Also, check out the new type of thermostat for your engine that prevents it from overheating when your thermostat fails used auto parts, salvage yards, Pick-n-Pull, U Pull It, eBay. These types of thermostats can be put on any car DeVille, D’Elegance, Escalade, luxury sedan. See the KZbin below” tutorial” and it will explain more how it works. Watch this video a few times to develop your confidence DIY. Please note, this is not an ad for Dex-Cool. Do your due diligence on using Dex-Cool. There are those that say, "Never ever use the GM recommended Dex-Cool and the tablets." Others will say they have been using it for years with no problem. Dex- Cool says they have reformulated their product. Others say don't use Stop Leak, but the recommended Dex- Cool tablets are made with the same stuff. Cooling System Sealing Tablets Seal Tabs should not be used as a regular maintenance item after servicing an engine cooling system.Discoloration of coolant can occur if too many seal tabs have been inserted into the cooling system Napa, Advance Auto Parts, AutoZone, O’Reilly’s. This can occur if seal tabs are repeatedly used over the service life of a vehicle. Where appropriate, seal tabs may be used if diagnostics fail to repair a small leak in the cooling system. When a condition appears in which seal tabs may be recommended, a specific bulletin will be released describing their proper usage. You do your research and you decide what you want to use.
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[@stampoutup-talking1436]

The FIRST thing you should do to prevent overheating in these "engines", and IF your head gasket hasn't crapped out yet because of it, is to do a BYPASS OPERATION on the air bleeder bolt on the water pump housing. This bolt is hollow and allows any air to escape the water pump housing which, when air is present---voila! instant pump cavitation, and then the engine starts to overheat. If you know anything about outboard motors (or pumps) you know that when your prop is not completely in the water, it CAVITATES and the prop becomes ineffective. I cleaned out the air bleed bolt but it still overheated. After much research on this, I discovered that, sure, the hose from the bleed bolt goes to the coolant overflow tank, BUT, before it does, it connects to some metal lines that take a tortuous path through, around and under a metal plate under the throttle body in order to warm the throttle body which warms the intake air. This is NOT necessary or needed unless you live in the icebox areas of the country-and maybe not even then-could be just an emissions issue. This torturous path under the throttle body involves a number of actual 180 degree turns. The problem is, debris in the coolant clogs up that metal tubing, and is causing intermittent blocking of the flow of water (and therefore air) from the bleed bolt, and thereby causing water pump cavitation. The simple fix is to bypass it using the hose from the bleed bolt to the metal throttle body pipe connection. Disconnect from the metal tubing, cut and inch and a half off the end of the hose for a fresh end for the tank nipple, and directly connect the air bleed bolt to the overflow tank. This is the BYPASS. Before you connect to the tank, turn on the engine and if you get a flowing amount of dribbling coolant from the hose to the tank, you will be good. If not, you need to remove the bleed bolt, clean it out with a coat hanger wire, blow it out, and reinstall, because that bolt can clog too. If you then have flow, you will probably have cured the overheating while running down the road. It did with my 99 Seville. Mine still creeps up on the temp gauge after idling a while for instance, in a restaurant or bank , etc. drive through. Before I did this bypass, the users of the vehicle got a professional coolant flush and new thermostat and it still overheated. I think the radiator could be gunked up. I think another flush and a new radiator will fix this. I think this was a flawed engine design from the get-go (that is only one flaw-the spindly weak head bolts is another). The engineers, who have probably taken this embarrassing mistake to their retirement, or grave, designed an engine that is somehow pulling air into the coolant system, is letting air collect up in the water pump housing, and is causing the water pump to cavitate inside its housing, become ineffective, and thus overheating the engine. They were too far along in the design to start over because they actually had a test engine, which probably to their horror, overheated. So they jerry-rigged that bleeder bolt in there to bleed out the air. That worked fine except they decided to use that dribble of water to heat the throttle body warming plate (which gets clogged up), and then dump it into the overflow tank. Just bypass that throttle body line and go directly from the bolt to the tank. All I know is that it fixed my problem.

[@user-os8iy2nj8n]

You typed entire thing in a foreign language. Please explain to me like I'm 5. You seem to have some great knowledge and I'd like to understand

[@jefferyepstein9210]

@@user-os8iy2nj8n 5 year olds shouldn’t be working on cars.

[@ImperatorCaesar22]

Really incredible information here. Thank you

[@ImperatorCaesar22]

Do you know where I can find a visual diagram or video on this?

[@notsofast2325]

@@jefferyepstein9210 Heres the product. kzbin.info/www/bejne/kKjVdZx3fcp9mdUsi=WIcssmYKftymAzHT

[@gerrylundergaard60]

We called it the Northstar because of the charming glow of the check engine light you'll constantly see when you drive it off my lot! America! Pay attention or pay cash!

[@firebird0u812]

My 98 Cadillac SLS has over 213,000 miles on it and is still running like a champ, no problems with it ever.

[@notsofast2325]

Nice!.. I love hearing stories like yours. thanks for stopping by.

[@hey_buddy_waz_up]

I take it you followed the recommended coolant maintenance schedule.

[@firebird0u812]

@@hey_buddy_waz_up Yeah, that and regular oil changes and most importantly WOT procedure every 2 weeks.

[@k.c.marshall921]

@@firebird0u812 What's WOT procedures???

[@lancedukel3436]

@@k.c.marshall921 wide open throttle.

[@NYKgjl10]

Since purchasing my 1997 2 door coupe El Dorado 13 years ago, the car is still going strong, thanks to your videos. Love my ride and engine.

[@notsofast2325]

Oh man!! You don't know how that makes me feel!! Thanks for saying hi !!

[@christiananaya9207]

I have a 1995 touring coupe 3x black how should I maintain it to prevent overheating

[@jameshoosier7928]

I drive a 2001 Deville that currently has 255,000 miles on it. I have done regular maintenance and repairs like idler pulley, water pump, 1 coil pack with plugs but as far as the engine that’s about it. I did have a bit of an overheat problem driving into Phoenix in 100+ temps but it didn’t go into the red zone on my gauge. Generally speaking I am impressed with the car.

[@FC-ce3nf]

2000 and above have different bolts

[@ACADILLACZ520]

Awesome! I'm I'm Tucson and just hit 180k. I belive I can get to 250! Your reply is 2 years old already - is your 01 still on the road?!

[@jameshoosier7928]

@@ACADILLACZ520 no when she hit 265k I started having lots of weird problems and decided it wasn’t worth the money and time so I sold it to a junkyard.

[@spirit_richhh5301]

@@ACADILLACZ520 any update ?

[@ACADILLACZ520]

@@spirit_richhh5301 My 05 hit 188K. Got some codes saying catalytic converter isn't working. Got some cooling system leaks also. She has always had a steady drip on oil. She will start and drive just fine, But overheats eventually with the cooling system leaks. With a little bit of time and money I'm sure she has some life left in her. My neighbor had passed away and I ended up buying his 08DTS, So I put the 05 on the back burner for now. The 08 just hit 140K and runs very smooth. I do prefer the 8th generation deville over the newbody DTS

[@vettrious]

What worked for me was to run prestone flush for a couple of days, then drain and replace ALL coolant lines, then only run prestone 50/50. Deville has been fine with no leaks for 5 years, then do it again lol.

[@bocabec6744]

Thanks for this. I just bought a 2002 gold Deville. It has 63000 Florida miles on it. I test drove it on I-95 and it went along like a Rolls Royce. I will be driving the car to Canada in April. Not one bit afraid of it. I liked your background music. Relaxing on Christmas Eve.

[@antoniovalle340]

bunny hopper did u make it to Canada

[@thirtythree160]

That sealant leak stuff will clog the radiator, heater, and that vapor tube 3:10. Sure It seals up little leaks. It also plugs up other stuff.

[@michaelowens2701]

Thank you for taking the time to do this! Good information! Peace!

[@notsofast2325]

Your very welcome.. check out my other Cadillac Repair Videos. Thanks for stopping by!

[@racerboy2212]

I have a 1997 Seville SLS. I use AmsOil Antifreeze. Works like a dream. Perfect for Aluminum block.

[@Vladpryde]

My parents just gave me their 1997 SLS with 121,000 miles on it. Gonna look into this, thanks!

[@yungnoahsark3104]

97 seville sets just hit 100,0 and i got it to 125 multiple times no problems

[@fishjunkie249]

Ive owned a 94 cts and own a 04 Deville 215k and does not over heat runs and drives made it from Minnesota to Vegas doing 80 in cruise control the whole ride no problem take care of it it will return the favorite

[@Jay-jb2vr]

@-TheManInDboX - Really?

[@floyd27860]

CTS did not exist in 1994

[@kennethclement8742]

The most valuable information I've heard for a Deville.

[@notsofast2325]

thank you. Glad i could help.

[@paull_4471]

I am looking at a 06 dts. I love the looks of these cars. I am trying to figure out how to prevent future problems. Thanks for the video

[@notsofast2325]

Glad I could help.

[@mickywhaley1382]

I'm sorry to have to say this Cadillac's are beautiful, and drive perfectly , BUTT I hope you didn't buy one , because North Star engines really are The worst engines ever been produced.

[@Zak78MN]

Very Good video Thank You for your information! I am keeping a 1997 STS in tip top shape your information helped me even more!!!

[@mikebates7757]

Looking forward to working on something different! I've owned a Mustang and an E350 for a lot of years. This is my first GM in about 35 years.

[@notsofast2325]

i know the felling , i had a 2000 Mustang, 2000 lincoln 120 Stretch Limousine, 1998 Land Rover, 1996 Ranger, Passat, now just 2005 Denali and Cadillac

[@biggslimm6987]

I was a Cadillac man until the Northstar engine broke my heart and my pockets

[@killyondabeat]

Me and my dad is dealing with the same thing, but thanks for the video!

[@garonburwell9008]

you couldn't have been because the engine before that shohuld've broken your heart worse. the ht engine was an even bigger piece of crap.

[@garonburwell9008]

@C Hansen why bastards? the same bastards make a chevy. buyers choice. buy luxury pay luxury. what is off with that?

[@bindibadgie1392]

bought a 2002 northstar cadillac and was told the white stuff coming out of the exhaust would go away, sure it did but that did not stop the need for a new engine or as engine rebuild, Thank you After Lease Auto Sales as now, the repair is as costly as a whole new car even a jasper will cost some $8500 to replace the engine... hum... if i took out the thermostat and left it always open, might that fix the issue?

[@garonburwell9008]

@@bindibadgie1392 thet never fixes anything but it does make some people feel better as if it did. and if you do fix it get a used engine out of a crashed car with less miles than yours instead of a rebuilt engine.

[@charlesammon3334]

Thanks for the info! Just bought a well maintain 2004 Bonneville gxp with the 4.6 Northstar. Very informative.

[@notsofast2325]

Awesome!! Thanks for stopping by.

[@charlesammon3334]

I've changed all brake lines, the thermostat and done a full coolant flush, and just did an oil change. Bout to change spark plugs and coil packs. Been driving to and from work the last 2/3 weeks with no problem.

[@Emilthehun]

Every older car I have , the first thing I do is coolant flush , and lower temp thermostat. Having a lower temperature, will reduce the pressure inside the cooling system. Yet to own a northstar, but owned lots of gm , and always always dump and wash out dexcool every 2 years.

[@garonburwell9008]

man good ol internet info! the cap controls system pressure not the thermostat. most injected engines with a lower temp thermostat will never achieve "closed loop" operation and therefore never run in fuel control and eat a ton more fuel. lower temp thermostat in a fuel injected car is a bad idea. a working thermostat controls the minimum temp and doesn't have anything to do with the maximum temperature or overheating.

[@dondesnoo1771]

The thermostat allows the coolant to superheat so when it releases the fan can remove more heat than at a lower temp .so it's a mixed bag .but sometimes a lower temp will help when there are underlying problems as h.gasket

[@LauraHorrorshow]

Thank you so much for this!!! My husband and I just bought a 98 Caddy DeVille S&S Hearse and the engine just overheated on us for the first time so it’s at the mechanic currently, who hasn’t gotten back to us yet about what the problem is. But when I asked about a different issue in a hearse forum on Facebook, everyone was saying to sell it or scrap it because the Northstar is a garbage engine. But we’ve already invested so much money in this car and we don’t want to give up on it yet. So we’re hoping we can fix whatever issues are going on with it and get many years out of it. But we’ll have to wait and see. Thank you so much for your input!! Any other info you have about repairing Northstar engines will be greatly appreciated!! 💕

[@notsofast2325]

Great , i hope you check out all my cadillac videos. dont forget to like and subscribe/

[@maxpuente3899]

Well what progress did you guys figure out ?

[@jmbb8497]

How’s the caddy?

[@douglas2lee929]

The Northstar is NOT a horror show, necessarily. But it does require careful maintenance. Do all recommended maintenance and service, ON TIME. And if it develops a need for service or repair, GET IT DONE IMMEDIATELY and get it DONE RIGHT. Don't scrimp. It is a good engine if you take care of it.

[@ktmoto9440]

great video, check all these things if you are having any sort of cooling issues this will fix it

[@davidadamson2588]

Thank You for letting al of us know what the factory uses for antifreeze, Orange Only

[@notsofast2325]

you're welcome

[@evgeni131]

Very nice video, relaxing

[@skywalkvulcan4309]

Really intelligent, thorough and valuable information. I would still own my beautiful DTS if I had known any of this.

[@notsofast2325]

Hence why I still have mine. Check out my other Cadillac videos. Thanks for stopping by.

[@jgfrakes2736]

I had a small issue with overheating, very mildly, and I replaced the overflow reservior, the water pump and thermostat, all hoses, and the small crack in the radiator. It hasn't ever overheated again, and runs right at the halfway (vertical) line at the top of the gauge.

[@jamiqussmith6261]

I have that same problem I replaced the mass air-flow sensor & the engine light is still on after I did the diagnostics on it....its a 2007 dts....its kicking my butt

[@brucesheehe6305]

1995 Aurora - I use green factory antifreeze - service every two years. No problems - 59,000 miles.

[@notsofast2325]

Thanks for your input.

[@mellyzaurora1277]

1999 Oldsmobile Aurora 89,000 miles no issues recently flushed coolant system temps stay under 200 degrees

[@brucesheehe6305]

@@mellyzaurora1277 My Aurora runs a little over 200 degrees - about 210 to 220 degrees.

[@daphynesanborn9794]

Ty 4 sharing. I found a beautiful 2006 sts n I so want it but my boys who own a race shop installing LS MOTORS. TELL ME DONT BUY IT BC NORTH STAR JUNK. BUT IT A GRANDMAS CAR W ONLY 54K ON IT GARAGE KEPT. I GOT TO DO IT ANYWAY SO IM GETTING EDUCATED ON HOW TO TAKE CARE OF HER. SHES SO BEAUTIFUL

[@notsofast2325]

I think the 2006 STS had some fixes. The 2006 V-series STS-V was introduced at the 2005 Detroit Auto Show. It features a supercharged 4.4 L version of the Northstar V8, along with handling upgrades. This engine is certified by the SAE to produce 469 hp. Correct me Guys if you have any info on this. I think you might be ok. here is a great link to look at talks about the reported problems on this car. www.truedelta.com/2006-Cadillac-STS/problem-histories-44 but please watch my videos anyway.

[@DJWerkz]

My nickname in the UK when I lived there was the Caddy Guru as I specialised in the 1998 to 2004 STS which GM supplied in right hand drive to the UK market to compete in the luxury fleet market with BMW and Mercedes. Never ever use the GM recommended Dex-Cool and the tablets, as another commenter has already said...its Dex-Kill. We always flushed every STS coolant system to run crystal clear then would use only the best coolant in the European market specifically designed for aluminium (notice the correct spelling lol) engines. There were actually some interesting differences on the cars supplied to the UK

[@edwardcoyle5425]

How important is it to use distilled water?

[@lancedukel3436]

@@edwardcoyle5425 Important. Hard water is not good for the motor.

[@filthyanimal874]

Edward Coyle ALWAYS USE DISTILLED WATER!!!! Minerals are very bad for the cooling system.

[@fernandgauthier7895]

my northstar was awesome .. BEFORE HE OVERHEATED WHITOUT WARNING LIGHT A PISTON GRIPPED INSIDE THE ENGINE THE PISTON ARM BROKE AND DESTROYED EVERYTHING YOU CAN IMAGINE INSIDE . it was my first and LAST cadillac sts .

[@lancedukel3436]

@@bossmansal67 do you mean the water pump belt?

[@aliengoth]

@@bossmansal67 it's timing CHAINS GENIUS.

[@davidjames666]

I wedged a small water bottle against the firewall and stuck the radiator cap overflow tube into it (rather than dumping it onto the street as it does from the facrory) this allows me to keep the surge tank as full as possible, and returns the expelled coolant back into the surge tank

[@lancedukel3436]

Surge tank is half full cold. That's the right level.

[@cadillacrick9438]

great video! I've been telling other Cadillac owners the same thing for years. I buy the GM seal tablets at the dealership.

[@markzavala2837]

cadillac rick seal tablets are the key

[@starxlr7863]

Maintenance is key and the correct maintenance especially! But great cars overall!

[@aprilmesick6831]

06 Cadillac cra limp mode

[@davidjames666]

Mark Zavala i always use the bars coolant supplement powder in my lower hose during my 4 year drain and fill refresh. It is made of ground walnut shells, and ginger root. GM stopped recommending it because uninformed mechanics and owners accused dexcool of "turning to mud".

[@lancedukel3436]

@@davidjames666 I have a 02 Eldorado ETC. No pellets, no leaks.

[@davidturner2113]

Good video.

[@notsofast2325]

Thank you

[@bindibadgie1392]

I have spoken to many folks who have told me the same. Unfortunately, most have also told me that the labor and parts are more then I feel comfortable in spend at this time, as it is not a show room car but a daily driving car... Sure I love the smooth ride and the extras out the ___ but as the folks I live with have just been taken away for retirement home daily care, the bills are already causing me to need to forget any extra costs, thank GOD it is not Covid-19 but just end of life old age mental situations. And with the Covid thing, I do not believe I will ever see them again, so the Cadi will just have to wait or be scrapped. Guess it is like you said, Bigg Slimm, the Northstar broke my heart and my pockets

[@notsofast2325]

sorry to hear that.

[@Tom-wq2mz]

I own a 1999 Deville D'Elgance I purchased from a 1 owner garage kept with 70K miles on it. I noticed he used the green antifreeze I'm going to change it out. Other than that no leaks and all new hose's when I bought it. With winter coming along Im taking measure so I'm going to flush the system a real flush of entire HAVC system along with back flushing the heater core. I love a hot G.M. heater and it's way to cold in the winter.

[@rayshawnfountain9003]

I have a mechanic thats works at a caddy dealer for 30 years and he said dex cool rusts the gaskets an makes them blow. So from what i was told the green is the way to go

[@jumpeven6100]

what the best antifreeze for a north star coolant system?

[@bindibadgie1392]

I am not able to get a lift so as to drop the engine/drive train, as so many videos have shown, nor do I have the equipment to roll the engine in order to get to the rear studs. And though I love my Cadi, unless I use it strictly for going to the food store a mile away, it tends to get hot after about 20 miles. I have blown air through the purge lines and watched the fluids flow out of them when they are apart and water is filled into them. I have no oil leaks or water leaks and the spark plugs are new, and the points are new, and the water pump is new and the drextol fluid is new with the correct mix, yet I can watch the temp gauge needle climb into the red on the gauge after about 20 miles. My usual Mechanic passed away not long back of ALS, and the rest tell me it's time for a new engine, but they also admit, they have not replaced many Northstar engines either, which makes me wonder. Jake in Canada says he could do the job but the stop an let the engine cool from Florida to canada , man would that be a long trip. Though Jake has told me about a guy in the Tampa area, who could do the job, but that is still a new Northstar performance engine or a Jasper engine. Either way, that still means dropping the engine, and the price of a new engine and the core charge. Plus the most important part, the wife, and her thoughts... Looks like I will just have to let this one go and find another car, if I can. Roomy and all the extras and the cadillac ride... Perhaps I will find a way to keep the cadi, but leaving it parked in the carport is no longer acceptable. It is nice to have a nice car, but since I am not Jay Leno, my collection is only for cars that I can drive every day, so... Thanks for all the great thoughts and advise

[@notsofast2325]

Oh man I know the feeling. So far my engine I running great but I know that time will come. And it hard to let go. Like a pet. Have you thought about putting it on a trailer and transporting it? Or put out a bid to have it hauled for a great price. To see what the cost is? Hey viewers. .is there anyone out there that can give this guy some advice other than putting her down?

[@slayyou]

if the water pump goes out your engine should go into limp mode northstar can run 200km without active fluid cooling

[@hey_buddy_waz_up]

Those N* sound like a muscle car when you do spirited interstate runs lol

[@notsofast2325]

They do sound nice..

[@dre504able]

Sometimes the head gasket will crack where the water parts right next to the exhaust exhaust gets into the coolant and causes the vehicle to run hotter. Or head bolt stripped same difference.

[@gwendolynapacanis8978]

96 bro. Traction control on no. Off ??engise. Chk came on. Week pass. Gets firer donot turn over? Waterpump??timing chain. Ir just tirad too.

[@gwendolynapacanis8978]

Meant. Engine. Tired too??

[@brknalex557]

Check all the pumps make sure there all fine and not clogged allot of the times it is diagnosed as a head gasket problem when it can be the tubes clogged and not pumping properly

[@notsofast2325]

Thanks for your input.

[@bobbylynch6586]

Hello great videos, would this apply to the 4.9L engines too? Mine has been overheating but I just dumped some more anti freeze into the radiator however it was the green antifreeze. She usually starts right up just curious as I bought her as my first car. 92’ El Dorado

[@notsofast2325]

Humm, i would get another cheap car just to drive around in. these cars are old and anything can go wrong with them and if you're not good with a wrench, repairs will add up quickly..Green engine coolants are designed for use in older cars (think pre-2000), ones that contain a lot of steel and copper components in the cooling system. To protect these metallic parts from rust and corrosion, Inorganic Additive Technology (IAT) gets added to the mix.And then we have orange antifreeze, which also defends against corrosion but instead of being geared towards older cars with lots of metal, it’s made for newer cars with more aluminum and nylon parts in the cooling system.his transition from steel and copper to aluminum and nylon started back in the 90s. Due to this change, GM introduced DexCool. DexCool is a type of coolant that uses a mix of different Organic Acid Technologies (OAT) to help to help inhibit the buildup of rust and corrosion. The cons of orange coolant manifest when it begins to run low. When this happens, oxygen may invade the system, creating a buildup that can clog and damage internal components. Thankfully, orange antifreeze should last as long as 5-years. Meaning so long as you remember to refill it, your engine should not experience any issues.The short answer - no. When orange and green antifreeze mix, there’s likely to be a chemical reaction that causes it to thicken into a gel-like substance. Since your engine needs fluid rather than gel, it’s unable to effectively cycle it through the system. Without proper cooling, various components may overheat, leading to failure. Take your water pump, for instance, which is in charge of pumping the coolant throughout the system. If it fails, you’re looking at a replacement cost of as much as $750. if you’re going to use a different antifreeze, you’ll need to flush your cooling system first, which carries a cost of about $100. Hope this helps

[@bobbylynch6586]

@@notsofast2325 Thank you for the information, very helpful I appreciate it.

[@notsofast2325]

@@bobbylynch6586 glad i could help

[@lilreh24]

Yes they overheat due to the motor being aluminum versus cast iron. I wish Cadillac would've just recalled these cars. They drive so incredible.

[@gabevee3]

Noooo. They overheat when the older version's head bolts expand a little and causes a leak of coolant. Also, some tend to just toss any old coolant in there... I did... but as he says in the comments this engine needs Dex-cool. I am on my second, a 2005 DeVille, and before I bought it I opened the overflow tank and sniffed the coolant. It smelled perfect. A leaking gasket has a distinct smell. I drive it normally, seldom revving it high and makes sure to change the oil and use Dex-cool, etc. Been just fine so far. Best engine I ever had. Good power and economy. 32 miles per gallon highway, 18 to 20 city, belying their claim of 24 and 18 respectively.

[@gabevee3]

@@thisnametooktolong NOOOOOOOO!

[@W4RY3NTRY]

Most LS motors have aluminum blocks and they’re the most reliable v8 on the planet

[@gabevee3]

@@thisnametooktolong Riiight. Whatever. Dozens of experts (not GE techs either) and personal experience versus you...? OK...

[@luminazkidd21]

GM not caring cause by the time the headbolts let go most cars were on the 2nd owner or enough miles were they felt like they already got their money...aka GM being fucking cheap

[@web_dev-rl2ve]

I know people complain about the northstars but when they're not overheating they're fun. I had a 2000 Cadillac DeVille and it's still my favorite car to date

[@floyd27860]

I'm on my 2nd DTS now. I had my first for 6 years with no problems. Had no intention on getting rid of until the accident 😢

[@willitmakeit]

Here are my thoughts. I've had many some great some not so great. What is comes down to it keeping the cooing system clean and do it on a regular basics. But here is where the issue lies..Its Oil Changes when they top off your fluids they don't understand dexcool and mix the green coolant with dexcool and in time this will cause a sluge in the system and over time it will fail. This was only because i had a 1993 Saturn and it was getting hot. When we did a flush we saw what in can do in time put in green coolant cars is just fine no overheating its been 2 years. and done the same to my 1998 Cadillac hearse and its perfect. just my take hope it helps someone

[@notsofast2325]

If that's what works for you more power to you. Good luck and thanks for stopping by .

[@livemusic8248]

I have an 2001 STS really nice car, for when the head gasket blows, a new engine is $22,000, repair kit for the bolts plus repair is $5k , remanufactured with performance mods $3k, everytime I drive the car hold my breathe hope the engine doesn't start to overheat. i will keep the car, just park it until can get the car operational once again. I had the radiator crack, i replaced the radiator, thermostat and all hoses, the 7 heater hoses took 10 hours to replace. The stop leak is known to plug heater cores amd radiator tubes, you drive the car stop it settles in the opening hardens and slowly it will plug the cooling system components, be careful using it.

[@notsofast2325]

Hi live Music , i would never by a new engine, there to many great used engines out there. Unless you have deep pockets. The new bolts installed can run around 2 grand. If you do it yourself i believe the kit runs around 4 to 6 hundred bucks if i remember Correctly ( the one without the inserts ) . Cadillac was telling us to use these pellets. which was made of the same stuff as Stop leak. The problem was, I believe, the original Cadillac owners who aren't mechanics thought if you just put more pills in it will ensure the engine from leaking. But instead it would just clogged the system and in turn the engine would overheat, and because the engines originally had poor head gaskets they were the first ones to Blow. In one of my videos I replace my heater core because one of the nipples cracked because of a poor soldering job. But the core fins were not clogged at all after examining it. The other video I did was inspecting the Coolant Purge line and that was pristine. I owe this to the previous owner plus my regular system flush every 6 to 12 months. Yes if you put to much Stop leak as you said it will plug up anything. I myself will add about 1 to 2 tablespoons int the system and regularly flush my system, I have been doing this to my car for the last 5 yrs or so. Like a GM Master Mechanic told me - Little leaks turn into big leaks. (Regarding internal parts in the engine). Thanks for your input.

[@livemusic8248]

@@notsofast2325 I like your user name "Notsofast" As for new engine, it is out of the question, to spend $22,000 on a engine to repeat the process and leak again. A company in Canada sells reman and reman performance replacements, at 2,500 or 3,500 your choice. They flux the block and heads, stud the engine. There is a kit available choice of (Time sert which the military uses), I use them in my trans rebuild if strip a thread, is better designed Heli Coil kit. They offer stud kit as well, since a high revving engine would stud the engine. I liked the 98-04 Sevilles, the STS is like the SS Chevy's of old. More potent motor, steeper axle ratio, wider tires, stiffer suspension and struts. It is really fun car minus the Bose stereo, it is loud at 425 watts in small space, just sound reproduction is not audiophile quality. I had old Nova's one was SS pulled the 350 installed 406 with Lunati racing cam, also sold the 305 out of my 83 Monte to a friend installed high torque 454 it is a handful, yet the Caddy is in between the two, response ot the Big Block and power of the cammed out 406. Just not as fast as either one, Buick is know as Going Fast with Class Cadillac should be "Luxury with Power when you need it"

[@johntaheri2047]

Does your coolant over flow from your coolant tank also how high your temperature goes please let me know thanks

[@Samuelfish2k]

john taheri It’s probably just a radiator cap that needs to be replaced.

[@someone7773]

I’m having to replace the heater hoses right now, what is that tube called you mentioned at 3:40 or do you have a video showing how to take it off?

[@notsofast2325]

Here is my video on it kzbin.info/www/bejne/e4DWfYOVh9GerJo Dont forget to hit the thanks button on the lower right.

[@notsofast2325]

here is one cleaning the tube. kzbin.info/www/bejne/bHObXqFofrF3mNk Dont forget to hit the thanks button on the lower right.

[@bindibadgie1392]

just what do se one feed a cadillac after they put it out to pasture?

[@Gostintheshadows]

In my 2005 I use the green coolant just change in often.

[@thirtythree160]

I think these Northstar engines are not cooled very well and this leads to the headgaskets failing. The fans are set to come on at 223F. They should be coming on at 200F in my opinion. I did a test where both fans were turned on(thats on high) and the coolant temperature would not stay at 203 degree F at an idle. The rpms needed to be increased and held at 1500 so that enough coolant would circulate to cool the engine and keep it at 203 degrees F. When you are driving on the highway what is your coolant temp averaging? Are you able to maintain that coolant temp at idle with both fans blowing on high? Would you do this test on your car and post the results? One way to force the fans on is to turn on the AC. Another way is to go into the diagnostics and manually turn the fans on.

[@robertlevy7553]

No the reason the head gaskets fail is because the head bolt threads strip out of the block I've been working on these engines since they came out in 1994 that's the reason why the head gaskets fail

[@londonkapolitano5860]

What oil would you recommend? 1998 cad Seville sts

[@notsofast2325]

I personally would use Valvoline high mileage 10:/30 synthetic. But as long as you using any good oil and change it regularly you'll be okay.

[@billhankins1293]

Enjoyed your video. Thanks. My car is a 2004 Cadillac Seville. Almost 6 years ago, its "Add Coolant" alert was displayed. My mechanic believed I shouldn't have to add coolant unless there was a leak in either my radiator or head gasket. Because he couldn't find a radiator leak, he suspected it was the head gasket. He topped the coolant off and put AlumaSeal in the radiator. He said AlumaSeal was the best product to use because my car has an aluminum block. I think we both felt that was a temporary solution. But, it worked magic! The "Add Coolant" alert has never again displayed and the car has never overheated. If my car did indeed have a head gasket leak, I'm wondering if the AlumaSeal fixed it permanently - or, is it more likely it never had a head gasket leak to begin with? What do you think? I'm considering a coolant fluid exchange but am concerned that may put me back at square one relative to whatever caused the "Add Coolant" light to come on in 2015. I know, under normal circumstances, a coolant fluid exchange would be good for my car - but I'm afraid of upsetting the miraculous results I've enjoyed thanks to AlumaSeal. I'm wondering if I should just leave well enough alone. What do you advise?

[@notsofast2325]

I would have tested to see if there was a leak, using a pressure gauge attached to your radiator fill cap and check the readings. if the pressure drops , then look to see if there are any leaks outside the engine, if not then it could be a head gasket. if you want to change the coolant because you think its old, i would buy a small antifreeze test gauge to check, they look like a eye dropper and there cheap. check first before you change it to see if its still good. ( you may not have to change it depending on your driving habits ). If it looks like you have to change it. I would change the antifreeze, but have some AlumaSeal handy in case your light kicks on again. Some guys would automatically put it in, but beware if you put to much it will clog your heater core. I was losing a little fluid in my 98 deville ( it wasn't overheating )and i added Alumaseal and it stop losing fluid. But when i change my fluid i add about 1/4 of the recommended dose. One thing i would also check is to see if the fans are kicking on at the right temperatures. You may want to check out this video kzbin.info/www/bejne/bHObXqFofrF3mNk Good Luck.

[@billhankins1293]

@@notsofast2325 Thanks for the detailed reply. I appreciate it.

[@robertdunaway-tyll7635]

Likely never was a leak to begin with and the sensor in the tank was stuck

[@billhankins1293]

​@@robertdunaway-tyll7635 Thanks, Robert. I appreciate your input. My '04 Cadillac is still running strong. How do you feel about a radiator flush and a coolant fluid exchange. Would you chance that - or just forget it?

[@robertdunaway-tyll7635]

@@billhankins1293 Well bill, I don’t have a Cadillac but I have an Olds Aurora with a Northstar and I know the sensor in the coolant tank can’t be changed, to change the sensor you have to change the tank but I bet with a coolant flush it could un stick the sensor and your light might go away

[@mikebates7757]

Not to say this is the first GM in our driveway, my wife bought herself a 6 liter '05 Yukon Denali with 180,000 kms, (100,000 miles) at an auction last year for CA$1900.00 "It was so pretty!" she said. She didn't notice the 'Check Engine Light'...for her a minor detail. Codes read that the knock sensors were the problem. KZbin university showed me the process on removing the intake manifold, and fuel rails to easily replace those sensor's. Cost me near CA$300. And solved the check engine light. So far, this truck has run well now. Oh, she paid $2,100 for the Limo Caddy

[@notsofast2325]

that's good to know. i'm currently editing a hydro Brake booster Repair video on the Denali. it was long and a pain but got it done. should be out about 4 days

[@Tom-wq2mz]

Keep in mind General Motors from factory put Pellets in the Radiator resivor tank. The Pellets are used to seal the complete system.

[@lancedukel3436]

Not true. Those pellets go in the LOWER rad hose NEVER in the tank. GM does not recommend that stop leak shit anymore. There is an old bulletin on it. Look it up.

[@Tom-wq2mz]

@@lancedukel3436 I've worked in automotive field for more than 35 year's. My STS I've done all the mechanic repairs myself along with my Deville. The Dex-cool is garbage and will cause premature failure and the Seal pellets do work to seal the entire coolant system. The most common issue with the Northstar overheating is the water pump going bad causing higher temperature under driving conditions along with the head bolts backing out creating a gap between the head and block. Their great cars as long as you keep the maintenance up on them that will apply to any automobile.

[@lancedukel3436]

@@Tom-wq2mz GM says not to use stop leak of any kind. Like I said there is an old bulletin from GM. I don't use anything but coolant. No overheating and no leaks.

[@bassb450]

Exactly. In 2006 Cadillac said do not use the pellets anymore.

[@lancedukel3436]

@@bassb450 Is that you Bass Cat?

[@mikebates7757]

There is a small issue that has come up with my car. The digital display voltage is reading too low, indicating a likely alternator failing. While driving it reads about 13.2 volts. When I turn on the headlights it drops to 12.2 to 12.5. I've been advised that due the Limo size and additional electrical loads that are over and above the regular DeVille chassis, that I should upgrade the alternator to a 220 or even a 250 amp unit. Do you have experience with this, and have any recommendations on this?

[@notsofast2325]

in my limo i had 2 batteries. the auxiliary was in a sheet metal box right in front of the passenger tire. i would replace the alternator ( if bad )and install a Auxiliary Battery.

[@mikebates7757]

Hey, g'mornin... I have two batteries in the limo. It was wired that way by Superior Coach, the builder of the limo body. I replaced both batteries. One being a regular starting battery. The other being a big deep cycle battery which is located behind the drivers seat. It is secured in a box, bolted to the floor. I changed out the alternator as well. The alternator I took out was a 140 amp, and I ended up replacing it with the same amperage. Larger amp units were ridiculously expensive. You will know, the ludicrously location of the alternator on the 4.6. You tube videos are plenty on removing the alternator, which almost all show major removal works of many components, fans and rads trany lines and such. One comment I read on one video, told of a small plate under the alternator, held on by 4 bolts. Removing that plate revealed an easy access path to drop the alternator out, super easy. All I had to move was a few wire looms just inside the plate area. I pulled one of the three fans to give the alternator a bit of room to turn, and provide access to the alt mounting bolts. Total time was a couple of hours. I was pleasantly surprised at how easy it was. Not as easy as swapping the alternator on my Mustang, (10 minutes) but still not as bad as all the youtube videos make it out to be! Long story short, all is back to 'normal'.

[@notsofast2325]

@@mikebates7757 awesome! !

[@mikebates7757]

If I had time, I'd make a video on how easy it can be to swap alternators in this car. But life at the present has more important priorities! Thanks!

[@notsofast2325]

@@mikebates7757 your welcome.

[@CDSAutomotiveGarage]

I could possibly be buying a 96 Cadillac DeVille 4.6 127k was owned by a old man an wasn't ever beat on the car is beautiful on inside an outside needs a bath but they only want $300 for it . Does need a few things like a battery , an a driver outside door handle . An it needs the trunk pull down part fixed as well as the blower motor fixed cause it doesn't come on at all when you command it to so I'm guessing the blower motor is bad not sure yet I haven't completely handed cash over yet an got it home but does run an drive an everything seems to be good lile fluids but i did noticed it did have green coolant in it instead of Dexcool in the reservoir so that not good . Just really hoping it doesn't have a bad head gasket or one that's about to go because I know that's not a cheap job or fix on these and it's so very common .

[@CDSAutomotiveGarage]

I seen some copper looking stuff in the reservoir but I'm not sure if it was copper looking stuff or the beads or whatever I don't know what that is not sure never seen it before it looks like dirt but I could be wrong I'm just not sure what it is inside the reservoir

[@notsofast2325]

I would flush it out just so i have peace of mind

[@mikebates7757]

I am so glad I found this video along with many others regarding the older caddys. My wonderful wife bought me a '98 DeVille 6 door Limo for Fathers Day. This car was garage kept for its entire life. Very cool part is that it only has 79,000 kilometers on it That's 49,000 miles for you south of the border. The car is mint. Under the hood is like looking at a brand new engine bay. The rad hoses still have the manufacture date on it of 12/09/97, yet they are solid, supple and appear to be in excellent condition So, I will be going over some of these maintenance and preventative measures I find here, to ensure that I can get a long life out of this car. We will be using it to volunteer drive for transporting cancer patients to medical appointments down in Victoria BC. Thanks for the platform here providing direction for the backyard guy trying to make things work and perform with thin wallets

[@notsofast2325]

Thank you very much! im glad you stopped by. I have 48 Cadillac Videos. Check them out when you have time. Thanks for stopping by.

[@justdoitgaming5946]

Bruh I got one never had a problem 160,000 miles and I floor it at least once a day 😂

[@notsofast2325]

Good for you..batman

[@scrilla2376]

I think the 4.5 and 4.9 engines were the best truly bulletproof

[@lancedukel3436]

4.9 was good. 4.5 was crap.

[@johnnygride2118]

They dont make no power though !!!!

[@cst1954]

I’ve had my 2007 Buick Lucerne cxl for 4 years and it has a Northstar V8 High Performance engine.. it has never overheated and I always push that thing because I have a heavy foot! Is it just the older Northstars that overheat or all of them?

[@lancedukel3436]

Well any car will overheat if the cooling system isn't maintained. The problem with these Northstar motors is the cooling system is sealed and ANY leak including small ones will lead to temperature spikes. Flush the system every 2 years, replace hoses ect when needed and don't add any snake oil in the system.

[@mikecastellon3022]

Well I push mine too... And pull and tow and roll.mine .a pile of General mtrs crap

[@lancedukel3436]

@@notsofast2325 No. My 02 still used the finer thread head bolts. But yes , longer. After 02 head gasket failure (which is due to the bolts pulling from the block) was greatly reduced. Yes, plenty still blew. But much less.

[@angry546]

Better head bolts in 2004 - 05 resulted in far less trouble.

[@bindibadgie1392]

Also on the over heating Northstar engine, I have done the block test and got the same almost instant blue to orange color change from the radiator coolant reserve tank as I did straight from the exhaust pipe. Any ideas other than to buy a boat to go with my new anchor?

[@notsofast2325]

Have you checked to see if your radiator is clean and flowing correctly, also see if your fins are clean on the radiator so you have good air flow. But my question is what makes you think you need a head job? Also I'm sure you replaced the thermostat when changed the water pump?

[@notsofast2325]

Check out this video watch 1:30 make sure the fitting is clean. kzbin.info/www/bejne/bHObXqFofrF3mNk

[@bindibadgie1392]

@@notsofast2325 Yes, the radiator was drained and flushed and re-filled with the cadillac recommended coolant, the dexcool stuff and looking into the radiator fins, they look good and have been sprayed clean with a house water hose. Plus the thermostat was replaced with a new one. To the best of my knowledge, when the local mechanic said that if the radiator block test changed colors, that meant exhaust fumes was getting into the radiator. He told me that it probably meant dropping the engine at a shop and dismantling the engine to re-drill the head bolt holes and putting in either studs or inserts. Then he told me of the day to drop the engine and the day to re-install it and a couple of days looking for problems, besides the bolt change. I took it by the Cadillac shop and they said it would take too long to do the job so they refused to do it. I think they just wanted to sell me a new car. Jake even told me that he could do it if I got the car to Canada, then he told me of a shop in Tampa, about 160 miles away. Then the wife got in on the act and said to hold off on that fix and get a different, car, or another non- northstar engine car. Even a local mechanic said they could install a Jasper engine, but that they had not done so yet on a cadillac. A first time training job, I guess. After all these great answers, I feel it best to just get another car, and fix it when the corona virus is over. Plus, without taking the engine apart, I do not know how to magna flux it to check for cracks, of which everyone tells me is very unlikely.

[@bindibadgie1392]

@@notsofast2325 After watching a few more of your Videos, I have determined to replace the Coolant Fans, I believe they are working correctly but before I park the car for a very long time, I think that a couple more hundred in fans will be only a waste of money if it does not work, but if that and a fail safe thermostat works, then I can be on the road again, otherwise I will still need to find my replacement auto Thanks for the Videos...

[@notsofast2325]

@@bindibadgie1392 good luck

[@markstark7731]

Serious question why did I have t2 mechanics and a shop owner who all works on caddy’s specifically tells me that the coolant doesn’t matter

[@williamsanders1819]

I got !n 2003 cadallic sedan deville dhs and I replace raditor,water pump,theomastat,and the reservoir and my car is still running hot

[@jimdent351]

It's my understanding that GM fixed the head bolt issue, but others are saying no. There seems to be conflicting ideas on a GM fix. What are your thoughts? I found a low mile 06 Buick for a good price, but this issue is worrying me.

[@notsofast2325]

I think your good, I believe they corrected it from 2001 forward. but i would have to double check. I believe i have answered this before. read below.

[@warringtonfaust1088]

@@notsofast2325 They made an improvement in 2001, cured it in 2005.

[@sigers1]

My experience/opinion/do’s&donts: If you see a leak small or big get it fixed as soon as you can. A little leak can turn into a big leak and a big leak can turn into a big problem. The owners manual tells you “do not run a Northstar on water. If you do you will blow a head eventually” It also states “Use ONLY GM approved products” etc. People are hardheaded and cheap and that’s the wrong thing to be if you own a Cadillac. When it comes to the cooling system this is when you really don’t wanna be cheap. Get the GM DEX-COOL coolant (not the 50/50) and never use green coolant. I dont know anyone who has followed the simple instructions on a Northstar cooling system and still blew a headgasket...... P.S. FOLLOW THE OWNERS MANUAL #Simple

[@Samuelfish2k]

Why not the 50/50 pre diluted?

[@CGJ7755]

Using dexcool coolant is good, but it must be 50/50…

[@wendwllhickey6426]

Water pump impeller goes bad

[@wendwllhickey6426]

Dex cool clogs up radiator,used universal coolent does work greati put it in mine 4yrs no problem

[@djt5782]

I just bought a 1998 Deville, it has 19,400 miles on it. I am not sure when to change the Antifreeze but I am pretty sure I still have a while but its the original antifreeze, is it bad to still be in there after 21 years ?

[@notsofast2325]

Congratulations welcome to the club. if I were you I would definitely change the antifreeze make sure it's topped off and there's no air. But I would also replace all the hoses, and fan belts, and change out the thermostat. a lot of these things you can do yourself oh, so you can have some peace of mind. also get a new battery..as you know in time rubber will become brittle and that's the last thing you want to happen to your car is to breakdown because of something silly. Or worse overheat your engine. Let us know how she's driving in the future.Good luck and thanks for giving us the good news and thanks for stopping by.

[@djt5782]

@@notsofast2325 Thank you very much for the advice. I am going to drive it to work for the first time tomorrow, I can hardly wait...

[@notsofast2325]

@@djt5782 make sure you roll up with some sunglasses on....

[@notsofast2325]

@@djt5782 make sure you roll up with some sunglasses on....

[@jblunttheebarber2427]

@@notsofast2325 that’s was great information. I myself just got a ‘98 deville. Of course we all here the fright of north star.. but I couldn’t resist the body. The info you gave right here is great for someone like me new and not knowing too much of anything. You showed me where to start thank you bro 💯

[@bohemialite6371]

Does the 2007 Northstar have the same problem with a head gasket

[@lancedukel3436]

They lengthened the bolts in 00. Then changed to a coarser thread 04. Any car can blow head gaskets.

[@stephenlacher5460]

@@notsofast2325 Apparently, true fix occurred in 2004. Band aids on earlier versions.

[@gabedoubleggriffin6446]

Currently have two a 99 deville and 98 delegance! ive always drove cadillac my whole 9 years of driving but i do have significant knownledge for anything or any problem at least with these year of cadillacs from 97-2003! This is a great break down video thats curent for other cadillac owners who may have the same problem! Great video Man

[@Sunrayman123]

Please send me the onk for the video, thank you Gabe. I need PREVENTATIVE ideas.

[@The20thCenturyLimitedRickyB]

It doesnt matter what coolant you use as long as its all the same. All orange or all green. I heard if you mix the 2 it will gel. Idk for fact but I know it doesn't matter what you use as long as its all the same. I use dexcool in my Honda and sometimes just water.

[@notsofast2325]

Thanks for your input.

[@nathanieldavislll5419]

The Best Temperature To Use For A Brand New Thermostat is A 195 Degrees Thermostat For Any Cadillac Deville 1990's And Up To Now Which is 2019

[@notsofast2325]

Thanks for your imput!

[@vettrious]

And of course, all new screw clamps on the new hoses, not crimp clamps.

[@kash1151]

The powder he talks about there is a liquid you can put in that is Uv and with a light it will glow where it’s leaking from

[@santosalvarado8714]

Do u recommend putting the powder even tho it's not leaking thru the gasket to prevent future leak

[@notsofast2325]

I myself put 1 teaspoon. Until my next flush. Thanks for stopping by.

[@chipete1]

I'm thinking a purchasing a Cadillac SRX with a Northstar engine .would you recommend this engine or avoided?

[@darrellkarrfalt5154]

Run as fast as you can! Trust me on this.

[@mary_3213]

AVOID IT LIKE THE PLAGUE!!!

[@joshuamcpeek4708]

you better be willing to take good care of it, its super needy

[@mary_3213]

Avoid it like the plague!

[@princeofgod_3543]

Don't Do It !!!

[@tommytmt]

Dude, you need to KZbin search: Dex-kill. NEVER. MIX. STOP-LEAK. WITH. DEX-COOL.

[@davidjames666]

Drain and refill the Dexcool every 4 years, and add a single tube of bars stop leak (it's made of ground up ginger root, and walnut shells) After 4 years, the ph of the antifreeze changes, and it starts corroding the threads in the head bolts. never ever drive the car with a leak, or with a smell of antifreeze.

[@tommytmt]

David James - NEVER put ANY kind of stop-leak in Dexcool… ever! Search KZbin for: dexkill. Something about the chemical makeup of dexcool makes it coagulate and clog up every cooling channel in your engine when mixed with a stop-leak of some kind.

[@davidjames666]

Tommy TMT i did see videos showing this, but for a car that is properly maintained and following the service intervals, and using the correct factory recommended sealing/stop leak supplements, there will be no issues. When I purchased my 1996 Cadillac brand new, I had the coolant drained and refilled every 4 years, and I made sure the supplements were added. 22 years later, and all is fine, and I never needed any work done on the car. I believe all the cars on KZbin were both neglected by the owner, and improperly serviced by the grease monkeys.

[@davidjames666]

Notsofast good read. The article didn't mention that manufacturers used to add bars stop leak into the coolant at the factory because of the porous aluminum castings. Shops convinced owners that the Dexcool turned to 'mud'. - what a messy time. Also the repair shops reused tty headbolts against manufactures warnings. Any time there is a major shift in fluid formulation, there is trouble - except the upgrades in Dexron transmission fluid. Ex. Dexron vi

[@chrislemaster2695]

I had one of these with a rebuilt engine and had a top Gm. mechanic tell me to use plain green 5 year extended life collent instead of Dex Cool.

[@lancedukel3436]

Correct. And NO tablets.

[@somersetlax]

I run dexcool and tablets... no issues

[@markteague8889]

I put one of those failsafe thermostats in my Saab and the dang thing stuck shut the first time I started it up and got it up to operating temp.

[@markteague8889]

Rotflmao

[@Sunrayman123]

maybe you put it in upside down?

[@rorybellamy2533]

how to prevent over heating on Northstar? buy model after 2005

[@notsofast2325]

Yes your coorect..

[@bohemialite6371]

My 1979 Lincoln Mark V is still running great the only thing that overheats is the gas tank

[@notsofast2325]

??? Gas tank? Milage? You have a Beautiful car. I saw this car when it first came out. My dad's boss bought one. I still remember how new it smelled.

[@bohemialite6371]

@@notsofast2325 yes what I meant about the tank it heats up my wallet if I drive it too much.😎

[@bohemialite6371]

@@notsofast2325 what I meant that my gas tank overheat it overheat my wallet but I love it no matter what is just a joke I drive it quite a bit thanks

[@notsofast2325]

@@bohemialite6371 lol.. yes it does. i have to run premium on mine. Yes if you have a car like this, drive it as much as you can, its a beautiful car. did you get your top done?

[@bohemialite6371]

@@notsofast2325 no it still has the original top.

[@thomasodetinape4180]

Dump the dexicool in the trash- RMI 25 is the stuff- Grand Nationals are alive to day because of it.

[@chriseichler2430]

What thermostat do I buy that wont close all the way?

[@notsofast2325]

its called Fail Safe thermostat

[@SleepyBoiii]

I have a 04 deville and it shakes when i am at a red light or when i press on the gas ... Can someone tell me what it is?

[@notsofast2325]

Sounds like you need a tune up..wires , plugs, may be coil pack. Cou ld be dirty fuel injectors.. take it to someone you trust..

[@notsofast2325]

@Jerry Phillips thats a good start..

[@johnnygride2118]

How many miles do you have on it ? I got 248,000 on my 98 Eldorado ive done ever thing your talking about but i think she finally shit the bed. Ive got plans to give her a new life with a 5.3 from a gxp or impala ss i know its going to be a nightmare but im really determine to have the only 4.6 based car with a completely different engine. Well IDK if there's anyone out there thats changed up to a better powerplant ... I haven't seen anything online but that don't mean its never been done ... Once i get enough money saved and find a lmpala ss grand prix, or a monty carlo FWD thats hit in the rear im going to go for it .. Thats going to be so badass i cant wait. I talked to a few LS guys and the hardest part will be wiring and trans . I'll figure it out somehow or die trying because i love my caddy girl to death and when i met my wife thats the car i use to take her out for dates in when we met she always liked rollin in the lil old caddy girl 👧 So i can't let my lil Eldo end up in the scrap / grave yard before i do . Anyway thanks for the tips but ive already been there and done that !!!✌✌✌

[@notsofast2325]

Wow youve got some work in front of you. Im sure someone has done this. As i was reading your comment , i was wondering why cant you get a newer engine without the GM problems. Like a 2003 or newer? thanks for stopping by. Give us a up date.

[@johnnygride2118]

@@notsofast2325 I don't know exactly why but the only motor that you can put into my car is a y coad not a 9 coad motor.. I guess a newer 9 coad motor has a lot of different parts that are impossible to see by just simply looking at them . The y coad and 9 coad motors look exactly the same sitting side by side in 2 different cars .But they bottom line are not the same and can't be inter changed . I've owned I think 4 or 5 northstar cars and I've read evey thing I could ever find about doing any kind of upgraded swap on them . The L37 from the early cars is a high output and makes more power then the newer cars.Thats what my1993 collector siries STS has . You can definitely tell it's a faster car then my 98 Eldo it's got a 1/4 the miles as my 98 too but I know for a fact. L37 make more power they look just a lil bit different then a y or a 9 coad . One eazy to see thing is the engine covers on the L37 are made out of pot metal not plastic. I've been playing with these cars for a long time now and really at the end of the day I want a more practical motor in my car then a northstar .The 5.3 LM7 that everone thinks is an LS but it's actually not because it's got a steal block not aluminum is the motor i want to use . And I'm 95% sure No one has ever successfully put one into a northstar based car . If you know someone who has please inform me of it I'd love to get some tips before I actually take on the project. I have talked to a few people on caddy forms that would like to do it aswell but as of now its never been done .Unless some guy some where had done it and dont want anyone else to know about it .

[@notsofast2325]

@@johnnygride2118 Interesting good info. well i hope there is someone that has done this some where. If there is anyone out there that has or knows someone that has done this, please let us know.

[@johnnygride2118]

Thank my friend I appreciate your help. 👍👍👍

[@jermainephillips5179]

I heard dexcool is what's causing some blown head gaskets....

[@notsofast2325]

Yeah there's alot of conservancy..

[@bindibadgie1392]

this cadi was adream car until the stud trouble. All the folks I spoke with said it was even worse than that because the entire enging had to removed to get to the rear studs, and dropping the entire enging cost more than many other comprobale cars, though comprable also means with less comfort and less options. Guess that is what the planned onsolecients is named for buy it to day and run the hell out of it because when it breaks, it is cheaper to replace then to fix.

[@notsofast2325]

Yes i guess there are alot of guys out there that agree with you. You have to be a Cadillac mechanic or have tons of money or like me be crazy to own one to fix serious problems with this car.

[@treefrogjoness]

The stop leak he used will plug up his radiator and heater core. I've seen people use that cheap stuff before, and later on he will be replacing his plugged up radiator. The heater core will be plugged up also, but since it is a major job to replace, the car might not be worth it. There is a much better stop leak available by the name of BlueDevil that costs from 25.00 to 65.00 dollars at parts stores, but it's worth it. The product is a blue colored liquid, and won't plug up anything but leaks.

[@notsofast2325]

Thanks for the input, I only put a small amount approx a teaspoon or so. And that's about it. It's worked for me for years but there's always something better. Thanks for stopping by

[@notsofast2325]

@@lancedukel3436 thanks for stopping by!!

[@davidhunt6463]

If you're changing your thermostat change your water pump as well. Quick job. Also check your electric radiator fan is turning at the right speed. Mine was idling away quite happily at about 200 rpm even as the car was climbing towards the red. I'd've got better cooling with one of those flappy bladed handbag fans.

[@Sunrayman123]

is that a FLEX FAN? exchanging a fan with temp sensor?

[@johnpowell8188]

Why don’t you take off the insulated beauty cover my 06 starter is under the intake not a fun job.

[@notsofast2325]

That was one of my first videos i did and is one of my most viewed video to this day. I had to remove and replace the starter on my Cadillac. I knew it would be tedious plus shooting the repair. So i opened up the garage door and walked over to my bar and put on some smooth jazz and made a pitcher of Cadillac margarita's and got to work. Thanks for stopping by. BTW here is the video link to the R & R Starter video Cadillac | Best | Starter Removal | Step by Step on 93-1999 | What mechanics won't tell you | DIY kzbin.info/www/bejne/oZLSgWmFa7GgmLs

[@Paulymuscles]

To keep that purge line he was talking about simple put CLR in the reservoir keeps it clean and does no damage

[@javierespadero8175]

Why lexus LS don't have that cadillac problems ?

[@notsofast2325]

Good question.

[@johnjohnt1989]

1998 to 2005 I think it was is the headbolts are trash fine threads and thin after 2005 they were ok kinda? Lol

[@DuaneDuff]

I have a 2002 Seville STS 170,000 miles, runs like I just bought it, u cant even tell the engine is on when its idling, take care of ur shyt, that's how it wont fk up. Common sense

[@texasboy9701]

Duane Duff Shut the fuck up

[@1100blake]

@@texasboy9701 you mustve blew your head gasket lol

[@dansufor5856]

AcidDon't Trip stupid

[@starxlr7863]

Of all my years being around these cars and driving them for many years, I've yet to experience any type of overheating problems, and I've owned several of them. These engines is really no difference than any other OHC engine. The proper type of coolant is extremely important. This is a problem with many other engines both domestic and foreign.

[@thirtythree160]

How well did you monitor your coolant temperature? Did you have the coolant temp displayed so that you could watch the temps in different driving conditions? What does overheating mean to you? Overheating to the point the engine goes into limp mode or exceeding average operating temperatures. Fans kick on at 223F. Average operating temp is about 208F. Temperatures above 230F is overheating.

[@thirtythree160]

@Notsofast When you sit in traffic and the engine at idle with no AC, how high does your coolant temperature get before the fans kick on and bring the temperature down. Where will your coolant temps average out at in this situation on say a day that is 85F.

[@sigers1]

My experience/opinion/do’s&donts: If you see a leak small or big get it fixed as soon as you can. A little leak can turn into a big leak and a big leak can turn into a big problem. The owners manual tells you “do not run a Northstar on water. If you do you will blow a head eventually” It also states “Use ONLY GM approved products” etc. People are hardheaded and cheap and that’s the wrong thing to be if you own a Cadillac. When it comes to the cooling system this is when you really don’t wanna be cheap. Get the GM DEX-COOL coolant (not the 50/50) and never use green coolant. I dont know anyone who has followed the simple instructions on a Northstar cooling system and still blew a headgasket...... P.S. FOLLOW THE OWNERS MANUAL #Simple

[@DiaperSNiFFER]

Do North star engines have timing belts or timing chains which years

[@lancedukel3436]

+Ethan King :Heavy duty chains thar rarely need replacing.

[@williamallen2817]

I follow the " factory " instructions and use the GM tablets , not all at once , and crushed to powder !

[@notsofast2325]

thanks for your input, and thanks for stopping by.

[@avrahambrea1919]

210k on mine never ben opened

[@supremevictory4310]

Lies

[@adamwhitt9349]

I would never put some shit in dollar store packaging in my engine. 😂😂

[@derekkarp9497]

that leak in engine is head gasket because HEAD bolts pull up stop leak dont work on a steel head gasket

[@notsofast2325]

yes..we have discussed that . Thanks for your input.

[@oliversfirealarms8407]

Or it could have bad Head gaskets. Like on my dad’s 1999 Cadillac Deville

[@lancedukel3436]

GM does not recommend that stop leak product anymore. Look it up there is a bulletin on it. If you find a leak fix it.

[@dre504able]

If its a small crack then that will work Blue Devil works the best I used it on my 2006 Nissan Altima work like a dream but it was a small crack it was not major.

[@lancedukel3436]

+Andre Eskine : NEVER put that Blue Devil in a Northstar. Can not be rebuilt after. Unless you want to scrap it and maybe buy some more time but otherwise NO.

[@russwray2827]

lost engine on 1998 do to the thermostat stuck closed when traveling cross country , one of the biggest reason you blow head gaskets . 100,000 change thermostat period ,that any NorthStar engine

[@notsofast2325]

Thanks for your input.