Car Engine Overheating - Causes and Symptoms of Over Heating Car Engine

www.TrustMyMechanic.com
"Why is my car engine over heating? What causes an engine to overheat"
I hear this question all the time on my websites and especially during the hotter summer months. I made this short video to help you determine what might be the cause of your overheating problem and what you can rule out as not causing the issue before you go to your mechanic. This can save you some time, frustration and money by doing so.
"My engine overheats at freeway speeds"
When you are on the freeway you have lots of airflow across the radiator which helps remove the heat that the engine antifreeze/coolant has accumulated from the cooling system. Since the engine is running at a much higher RPM than that at idle, the water pump is spinning around and pumping coolant at a much higher rate as well.
If there is a restriction in the radiator, the coolant will not be allowed to circulate fast enough inside the engine. The coolant will basically be roadblocked inside the radiator due to the restriction. A radiator usually gets build up of rust, minerals and calcium type deposits at the BOTTOM of the radiator. This restriction really can not be removed by "flushing" with a garden hose. In most cases this restriction will require a new radiator.
Think of this type of engine overheating problem like this. You are trying to run a 10 mile marathon, but you have to do it with your mouth taped shut. You can walk with your mouth shut but running at full steam for a long distance requires more air than your nose can provide. A restricted radiator is the biggest culprit in an engine overheating complaint on the freeway or at higher speeds. Although, if the radiator is low on coolant....that can also be the problem, so check coolant level first.
"I am constantly having to add coolant to my radiator, do I have a leak?"
Anytime I hear of a coolant leak or engine overheating complaint I ALWAYS start my diagnosis with a cooling system pressure test.
"My auto mechanic said I have a head gasket leak in my car"
I get tons, literally tons of emails each week with this question. I would say that most of them are NOT having a headgasket problem but rather a lazy auto mechanic problem who failed to do a proper cooling system pressure test.
Here are a few common symptoms I would expect to see if you had a blown headgasket or any other internal coolant leak.
1. Constantly having to add coolant to the radiator, with no visible external leaks found
2. White steam/smoke coming out the tailpipe, and worse or more smoke at freeway speed
3. Failing a cooling system pressure test, meaning the air pressure gauge drops but there are no external leaks to be seen.
4. An engine miss fire, due to coolant leaking inside the cylinders and fouling out the spark plugs. Lack of overall engine power and performance.
5. Usually a yellow check engine light will be on the dash, since the computer sees the engine miss fire and stores that code inside the computer memory.
6. Lack of engine compression. A manual compression test should be done on each cylinder to prove that there is a compression problem with 1 or more cylinder. This is different from the PRESSURE test which I mentioned above.
7. White powdery residue on the inside tip of the spark plug. When coolant enters the cylinder on the inside of the engine (which It should not be doing) the engine is going to try and burn that coolant, which it will have a very hard time doing. This coolant is what causes the engine to miss fire and produce the steam white smoke out the tailpipe. A white powdery residue will some times form on the internal engine tip of the spark plug.
If you have any of those symptoms AND you have rule out all other possible issues then you might want to consider trying this very simple and effective head gasket sealer you can do yourself. I have had great success with it over the years. It's a sealer additive made by K&W, called Engine Block Sealer, but don't use it as the can direction say. I think my way of using it works much better and its much easier.
www.myhonestmechanic.com/artic...
Do NOT use a radiator stop leak additive! check out my sites for more free information
www.myhonestmechanic.com
www.trustmymechanic.com/forum (ask your questions for free on my forum board)

[@likhwadube5937]

Excellent vid, one thing that's often overlooked is a faulty coolant reservoir CAP. If that leaks even a little bit, could lead to all sorts of problems......

[@garybaris139]

That will show up with the pressure test.

[@soljainc123]

learned alot from only watching a couple of your videos, thank you.

[@trustmymechanic]

You are more than welcome, thank you so much for the kind words. Yes, I have more videos in my youtube channel for you to watch. Have a great week.

[@carolcrow7192]

Many thanks my stress level has gone down! I'm a 67 year old women and don't know anything about cars but I understood everything you said! I'm going to check the things I can and if I can fix it by myself will, only then will I take it to a mechanic and will feel more confident that I won't get ripped off!

[@mikehotwagner6072]

I have a 1999 Buick Park Ave. I need to know if it's the engine because it had overheated in they drove on it a little bit longer and I don't know what happen now there is a loud noise and someone said that it sounds like it's the engine I don't have anything that leaks I keep up on everything with The only thing I didn't do was add oil which I needed to do that day do I need to get a new engine or is there a fix I can do really need some help here

[@CollosalTrollge]

greetings from South Africa, nice video.

[@jaredvaldez4324]

Imre Csoka /Ay ni yo estudié en cuenta tu Thousand One ventro echarleI need troubleshooting heating up in the 2001 Chevrolet

[@MrKrunkenstein]

Thanks for the info. Very informative. I'm having trouble with my 2004 Durango. Replaced water pump and fan clutch. Coolant flushed out too and still running hotter than should be.

[@trustmymechanic]

Most welcome, glad to help. Hope you came to my sites listed in the description, TONS of good information there.

[@ChitabKoret]

YOU ARE ALWAYS RIGHT #TrustMymechanic.i believe you and TRUST YOU!! I took my radiator for thorough check and cleaning.i thought my Daihatsu Feroza is dead but believe me NO MORE OVERHEATING,i felt the radiator cap it was cold as if in a refrigerator,not like before,it was so hot you wont attempt to feel it! Hey man,welcome to Kenya i give you a ride to Masai mara national park!

[@trustmymechanic]

Awesome, I hope to take you up on your offer one day :)

[@justincooper3211]

What was the problem

[@ChitabKoret]

@@justincooper3211 over heating

[@trustmymechanic]

Yes the waterpump could be your leak source. They tend to leak more when the engine is running than when engine is off...and leak more at higher RPM like on the freeway when the engine/RPM/water pump is spinning faster. They do make some supposed water pump leak additives but I have never seen them actually work :( replacement is the only real option. You have not mentioned any of the common head gasket problems so I would say no at this time. Let it overheat real good just once...then yes!

[@ifyene9046]

The mechanic had the thermostat removed at the installation of a replacement/new engine to allow free flow of water or coolant into the engine. I got another radiator but keep loosing water after every 20km or less (in heavy traffic situation). 2. Is it right to remove thermostats from the car because the car is now being used in the tropics where the atmospheric temperature is high like Africa ,to prevent overheating?

[@OSCARANDRES039]

Ant inputs will be greatly appreciated. Thank you again!

[@salaguirres]

Thanks this helped a lot I was stumped by my car overheating with recurring antifreeze refills today, I'm so mad have an old 99 Toyota Camry and it just keeps overheating when I run on the freeway. I need to pressure test it and check for any blockage and leaks for sure.

[@jazellreid7253]

well i have rust in my cooling would that cause my car to overheat

[@nanocdavis2296]

This guys family has been in the auto repair business for over 63 years so he's an expert. This video helped me solve my over heating problem in 10 minutes. He was a technical consultant on a car maintenance software program www.lonewolf-software.com/automotivewolf.htm you can use on your computer to monitor and manage your vehicle maintenance schedules. All the maintenance schedule requirements in the program are from this guy (Austin Davis). I've been using the software for over 8 years and both my vehicles are always running great and it has saved my a lot of money in repairs.

[@carlcarman4959]

I use the Automotive Wolf software too. It's great :)

[@renragged]

Lots of good info about cooling systems in this video. Best I've seen, and I've been watching several this morning because my wife called me and said her car was overheating this morning... :( Hopefully I can get it sorted out when I get home. Thanks for sharing!

[@trustmymechanic]

Great, keep us posted as to what you find out. Yes, white smoke/steam under the hood would indicate an external coolant leak spraying coolant on the hot engine.

[@jerrysgen121567]

hi, every time i drive for only 30 minutes my radiator is always empty with coolant though i didn't see any leak on it. need your help. thanks

[@trustmymechanic]

You need to get a cooling system pressure test to help you locate the source of the leak.

[@r33l007]

I changed my radiator,thermostat, and water pump..stIll overheats 'm lost on my 2000 Chevy venture 3.8

[@trustmymechanic]

Did you do a cooling system pressure test? Check radiator cooling fan? When does it over heat, at idle or at freeway speed? Is there an air pocket in the system that needs to be bled out? You got homework :)

[@Tom3c]

bad catalytic converter ?

[@fireapple8362]

Was it over heating and did it stop

[@NOBOX7]

blown head gasket .....

[@January19_41]

NOBOX7 my 2003 chevrolet venture is smoking from under the hood in the back on the passenger side and my service engine light is flashing off and on

[@Utube75]

very informative video. i have a car that is overheating in idling and at stop lights. i just noticed the overheating when i stopped the car this morning from gym. i saw the coolant reservoir was empty and poured some and drove 8 miles for lunch. it over heated and touched the red zone. so i immediately stopped by pulling over. i waited for 10 minutes and the engine cooled a bit , so i started and drove the needle was much lower than before start. no leaks whatsoever. refilled more coolant

[@trustmymechanic]

Sorry for my delay, have been out of town on a roadtrip vacation with family. If you are adding coolant you DO have a leak somewhere in the system. I would get a cooling system pressure test first to help locate any possible internal or external coolant leaks. 2. Check the electric radiator cooling fan operation (should cycle on and off) 3. Check for a restriction at the bottom of the radiator, both radiator hoses should be about the same temp when engine is warm. 4. Check thermostat

[@magnanorris3530]

You do not need to go to 20 pounds for a psi test. Maximum you will need is 15 or 16.

[@Jorgetherealtor]

Magna Norris fuck no Max is 13 going over that you’re going to mess a o ring up or seal

[@dawncastro160]

@@Jorgetherealtor Fuck Jorge you are wrong This time,my Acura TL has a 16psi cap.

[@metzmatu8409]

Normally radiator caps are rated at close to atmospheric pressure of 1 bar (14.5 psi) +/- 10%.

[@butonphillie5114]

failed to mention about water pump for the belt

[@lloyd-qt1mg]

So good to watch .... all his points are so relevant! Thank you so much for sharing your knowledge ....

[@TedEthio]

What an amazing person! Thanks for your work in making others' lives better.

[@m.jenkins8503]

Excellent video. Great presentation on tracing engine cooling issues.

[@ChristopherPausz]

You explain these things very well. Thanks for the info

[@m.jenkins8503]

Great video. You explain everything throughly and easy to understand.

[@geminiloves]

This was very helpful. Thank you!!

[@datzlukeh2627]

Great video thanks!! But I was waiting for you to touch on the fan clutch wearing out over time and not engaging the fan which effects the cooling!

[@CETODELtt]

Thank you I even before finishing your Video you have helped solve my Problem your methodical Diagnostic analysis system is class A

[@Joey083]

Great video man. Surprised I'm just coming across your channel now. Subscribed.

[@trustmymechanic]

Just make sure there are no kinks or restrictions in the radiator hoses that would reduce coolant flow. As a rule of thumb, I always replace the thermostat when replacing the radiator or where there was an overheating problem.

[@abhishek046735]

sir i can say for sure that u r helping to much and u r truly honest with ur profession

[@JoseVargas-bm4rh]

Awesome information, thanks for all the good tips

[@jesusvazquez326]

Wow I read the description great causes and examples has helped me

[@santoshkalindi]

superb video; explaining all required stuffs. excellent job.

[@bigred7347]

Very good explanation. Those who thumbed down have probably never trouble-shot a vehicle problem....

[@gyver471]

Wow thank you for this great explanation of the parts been looking for a detailed simplified explanation keep the videos coming.

[@EChord1]

Helped a lot - thanks for giving such thorough info!

[@michaelcrawford310]

Nice video! Wish I would have watch this before the other 30 videos.

[@musicbybarb]

You are such a nice man!!!!! I wish YOU could be MY mechanic!!!!!! thank you so very much for the video...Hoping you have made more videos like this because you are soooo helpful!!!!

[@shellascott7770]

Yea those I am not having any of those symptoms. No smoke or milky oil but there is air getting into the system somehow. Thank you once again for your help!

[@smartfalcon8116]

Top man. I have an overheating seat Water pump changed thermostat changed Pressure test done and still overheating Radiator next to check? It only overheats on freeway not when idle.

[@mkmills36]

The spring type clamps are superior to any screw/worm clamp. During temperature and seasonal changes the worm clamps can and will leak if not tightened and retightened. The springs clamps never will be loose or leak due to temperature changed as the spring will always tighten.

[@trustmymechanic]

It could be, but since you saw smoke I would assume you probably have a coolant leak spraying water on the engine, so get a cooling system pressure test first to rule out an external or internal coolant leak. Then check the inside of the radiator for a restriction or heavy rust build up. If you see rust/mineral deposits inside then the bottom of the radiator will be heavily restricted and could be your overheating issue.

[@cking420ck]

Thanks man this really helped me out I have a 2003 Dodge ram 1500 that does run hot on the highway and at idle speeds replaced fan clutch and radiator which stopped problem and it gets really hot out here in Killeen TX too

[@trustmymechanic]

Usually when that happens its due to a restriction in the radiator or some other coolant restriction like a stuck thermostat, or from lack of airflow across the radiator. Make sure the radiator is full of coolant, check upper and lower rad hoses when engine is warm (they should be close to same temperature) and that there is plenty of airflow across the radiator...ie. cooling fans working, or manual fan is turning fast enough.

[@HelpMamaRemote]

Excellent video and information. We recently had our trans rebuilt on a ford taurus (trans leaking now and still hasn't been repaired because repair man putting us off). The next day the engine light came on and comes to find out it was a fuse by the transmission. Now the car is overheating shakes and cuts off. Any thoughts?

[@bigrontheexception]

In 17 years I've only had 1 bypass hose which ruptured, other than that I still have all the original hoses from 275,000 miles ago. They have outlasted 3 radiators, a thermostat, and a water control valve, I'm hanging on until they start bulging or rupture. They cost to much to be replacing as preventive maintenance. I probably would have changed all the hoses 3-4 times and spent around 300-400 bux along the way.

[@trustmymechanic]

Great, keep me posted as to what they find out.

[@laurabarber6697]

thank you! Really helpful advice for a total novice when it comes to things under the hood of my car! I appreciate your Insight and honesty!

[@sheldonm3535]

Great video! Also good to replace the cap with a new oem one.

[@Sandmanjz71]

excellent video, I would have to say though always check the lower radiator hose condition as well as when you check the top, in addition if your having overheating issues at highway speeds and you know its been a long time since you've flushed the system running on dirty coolant, it would be a good idea to check the water pump as well, I had the waterpumps internal propeller on my 98 f150 dissolve due to running on old coolant BTW headgasket test kits can be rented from AutoZone fairly cheap

[@raul_f_1234]

Great video. My Trams am is overheating when I'm stop at a Red light. I will check the fans. When I start moving and picking up speed the needle goes back to normal. Only when I'm stop at a red light the needle goes all the way up

[@tapia79r4p]

Great video, Thanks! Saludos from San Antonio

[@trustmymechanic]

Gracias Amgio, I love San Antonio!

[@goolgappa5884]

Excellent... My car went hot when I was in traffic light.. When I drove it it went down .. But it happen few times but then it never happen ...what do you think what happen

[@trustmymechanic]

Thank you. Remember that "flushing" really doesn't do much and that the junk and mineral build up happens at the bottom of the radiator which can not be easily flushed out. A new radiator is usually the cure. Make sure there are no coolant leaks, no air in system, the engine IS actually running hot and not a gauge issue and the radiator is not restricted at the bottom. Upper and lower rad hoses should be able the same temp when running hot.If you have over 100K miles a restriction is possible

[@trustmymechanic]

More than welcome. If you think you have a coolant leak then you need a Cooling System Pressure Tester. A compression tester is used on the engine to determine if there is internal wear/damage.

[@olenaerhardt7725]

Thank you for pointing out on all those causes for engine overheating. Our 2003 Chevy Cavalier (~111K) overheats only when AC is on and on stops. So most likely it is a faulty radiator fan. But the car has another problem w/knocking sound when it starts to move. The frequency depends on rpm, and it doesn't change if to switch gears on speed. No sound (knocking noise) on idling. The sound is heard in the area of engine, looks like more on the right side. Can those 2 problems be related? I replaced a radiator on another our car (2001 Saturn SL2), and it was not very difficult. But on Chevy I think maybe they are Connecting Rods which make that knocking sound, so I even don't know if to proceed with this car. My hope is that the noise is only in motion, I hope it is smth on suspension. Thank you again for this informative and detailed film. As a DIY mechanic I've learned a lot, like about time interval when hoses should be replaced, why and when it could be overheating on high speeds and when on idling. It will be my main channel on overheating.

[@kennethgambone5743]

Thanks,I had my 2008 ford focus.one owner,me great on gas great car.im just now starting to put work into it thanks for the upload

[@draeallen]

first off thank u for the video I don't know where to start I need to know if I have a fixable problem or if I'm screwed car overheated on a hot day it holds pressure has heat air works changed waterpump fans work unless it has a shortage two things that appears strange to me is when the radiator hose is squeezed it makes a clicking sound over at the radiator area and when I take off the radiator cap the coolant was just running over spilling out while engine is cold

[@ivexXturbo]

Very detailed and informative video great content, thanks brotha!💯🤙

[@lori8553]

What if you find oil in the overflow tank and on the radiator cap? Can it be a cracked head or seal? Thank you. I hope 🤞 to hear from me. I don’t want to blow up the engine. Yes I am a woman doing the work. Almost to old to be doing this stuff.

[@trustmymechanic]

The bent fins are pretty normal, road debris and bugs etc. can easily damage the thin aluminum. The real issue is inside the radiator at the bottom, where mineral deposits and rust build up and restrict the flow of coolant. BUT, usually a radiator restriction problem shows up at highway speeds rather than slow speed or sitting in traffic. Keep us posted as to what happens.

[@Mel-2828]

TrustMyMechanic.com I've been told I have a blown head gasket or water pump I have a 2010 Town and country I no from the person I got it from it does need a new radiator. What should I believe also is the water pump for a 2010 Town and Country the same as it would be for a Dodge?

[@shellascott7770]

Ok thank you for your help. It still over heated today so I will need to do a pressure test and buy a new radiator possibly.

[@trustmymechanic]

yes that is a good idea to remove the air, and air pockets will reduce the coolant circulation and cause the overheating. Sometimes you have to drive around a bit and let the thermostat operate, run the heater, then come back and let it cool down and top off with coolant. You should not be able to easily squeeze together the upper rad hose with your hand when the engine is warm, or there is air inside or a coolant leak.

[@ericcraighead9158]

When you refer to your truck not having a radiator cap and it being “ here”, are you referring to the cap being the overflow bottle?

[@StrangeWorldPodcast]

Thankyou this has helped me a lot, I have a 2002 Chrysler sebring convertible Lx 2.4L , My temperature gauge jumps up sometimes when I accelerate too hard, I came home parked in the driveway , I noticed I have a Leak in the front, I think its oil, I need to buy a compression test to see where its coming from. I'l be back on here to comment when I find out more.

[@klarson9639]

Great video, very helpful. Thank you

[@no00n]

I have a 2004 Mercury Monterey Van that is over heating. It will overheat when driving but if idling will cool down. It will go from normal temperature to red-zone hot instantly (does not rise slowly when overheating ) anywhere from 5-15 minutes when driving .Uses antifreeze but no leaks. Replaced cracked radiator cap and then replaced thermostat but no change. Appreciate any help you can give.

[@ambla23]

Very helpful and informative!

[@8798a1]

great video, what do you do when your vehicle has overheated and antifreeze is all over the road...you tow it home...where do we start?

[@559gittinsome559]

Helped A LOT. Thank you so much

[@musicbybarb]

Oh GOOD !!! I just saw that you have MORE VIDEOS..thank you!!!

[@trustmymechanic]

Circulation inverted? Did you replace the water pump with one that pumps in a different direction than the old one? I don't understand your question can you please elaborate more.

[@FatinAli123]

This video is very good I learnt more and im gonna do level 2 motor vehicle course it will help me in College keep up the good work

[@vijaychandrashekar5363]

Wonderful guidance. thank you so much. appreciate it sir. i detected myself that i have a water pump leak which is causing the overheating now. thank you so much

[@trustmymechanic]

Thanks for your comment. Glad you found it helpful and solved the issue.

[@trustmymechanic]

Have you checked to make sure the electric cooling fans are coming on and off? Check coolant level, check for leaks if low. Check radiator for a restriction if the overheating seems to happen after long freeway driving at higher speeds then coming to a stop.

[@holidayrap]

Thanks I look forward to it. It seems like the real deal to me. If you test it and think its a good thing, it will be great to share with your other subscribers and viewers. Peace.

[@ea168]

My head gasket is fine, i have mentioned white smoke but not from the exhaust i am guessing some leak fell on the radiator caused the white smoke. I will do the pressure test to find where the leak is coming from. I'll keep you updated , thanks for your help.

[@richardhaen]

Very good video, I have a 2006 Toyota Highlander 397500 miles on it, I had check engine light come on test said bad Cats had the replaced (engine never run hot) after the were installed highway driving the engine will get hot, A/C on or off, no leaks. Slow down it will cool down useless run 65 mph. The cats cost 1350. Parts and labor, what do u think? Thanks

[@BradAnderson153]

Great video! thanks for sharing!

[@trustmymechanic]

It is normal for the water level in the plastic "over flow" reservoir to rise and fall as the engine reaches normal operating temperature. You need to keep an eye on the radiator coolant level, if that falls then you probably have a coolant leak somewhere and a cooling system pressure test can help you locate the leak. If the coolant level inside the radiator stays full, you should be ok as long as there is not an overheating issue.

[@trustmymechanic]

I love the sound of radiator baffles in the morning :)

[@Mike_Hog_A_Nator]

I'm South of Houston. My 02' Blazer 4.3 is seeming to get around 210° , it does when towing a small utility trailer. No leaks, water pump works fine, flushed the radiator twice in 2yrs. Just installed a Severe Duty Clutch Fan but doesn't seem to help.. My AC is always Cold as heck. In the past with a 195° thermostat, it's always ran just below 210° & now it's trying to rise a bit higher which bothers me.

[@SPRAY915]

I having over heating issues with my 04 Chevy Impala 3.4 liter. I've replaced the radiator, water pump and thermostat. Still over heats, fans are working, no leaks either. What do you suggest??? At stops needle raises up high near red area then when car is moving needle decreases. Your neighbor in Dallas, Tx.

[@debbiehoule432]

This is super helpful. Thanks so much!!

[@trustmymechanic]

Thank you, appreciate your comment.

[@amandeepsinghpannu1372]

Good Video. I have 1997 toyota corrola. Radiator Fan in working, thermostat has been replaced. My car overheats, but when I turn on the heat inside the car heat fan to full the car does not overheat. The overheat Gauge goes down as soon as I turn the heat on. I open the radiator cap when the car was cold and heated it up, It spit out hot water, occasionally from the top of the radiator. Any suggestions what may be. I do not really have any equipment to test the combustion air leaks.

[@jeromemuller962]

I just went through this problem with my 05 navigator with the 5.4 engine, driving on the freeway, noticed that the temp gauges went into the red line. Got off the next exit, found a place to park an pop the hood to see what going on. Had to sit there for fifteen minutes to cool down. Looked at the reservoir and it was sitting the low mark, but it still had coolent. After cooling off, I drove a little slower, went to auto part retailers and purchased some 50/50 coolent and topped it off. Drove it home, next day, drove awhile,, and the gauges indicated it was starting to over heat. Next day I got radiator pressure tester and the fitting to test the reservoir bottle and cap. The tool and adapter didn't seal, had to use some pipe sealant tape to get it to pressurize. Was able to pressurize, but was leak at the threads of the adapter. Same with the adapter for testing the cap. I had purchased a new thermostat when I got the testing tool, but I had not installed it yet. I returned the testing tools and purchased a new pressure cap after noticing that the rubber gasket in the cap was worn down. Put the new cap on then took a test drive and monitored my scan tool for the coolant temperature. After the engine got to temp and stable, I continued drive at freeway speeds for fifteen minutes. The coolent temp stayed steady plus or minus the thermostat rating, problem solved.

[@Sr_iRL]

So the overheating was cause by a bad radiator cap?

[@ednja]

Austin, I'm suspecting a head gasket leak in my chevy venture because when I take the radiator cap off when the engine is cold, the antifreeze rises up and runs out of the radiator. I have to quickly get the cap back on because it keeps running out. I'm suspecting there's a very small leak because there's no white smoke out the exhaust, the engine runs good and I haven't seen any bubbling in the reservoir. What are your thoughts on this? Also, how can I test my radiator to determine whether it has restrictions in it? One other thing. In my chevy venture, the fans don't turn on until the engine is running quite hot (I forget the temperature) but that's the way it was designed. I'm thinking I should add an aftermarket circuit to make the fans turn on at a lower temperature and I'm wondering if GMs design of running the engine so hot might be part of the reason why the transaxles fail so often. What are your thoughts on that?

[@OSCARANDRES039]

Hello sir and thank you for your video. 05 tahoe here!!. I was in stop and go traffic the other day when I noticed my engine temperature gauge moving past the 210°F point where it usually and normally operates. It would not completely go in to the red zone but it did concern me since it never did that before. I had the heat running at that time when this happened. While trying to diagnose this issue, I notice that when I would turn the heat off the temperature gauge would go back down to its normal operating range of 210°. Any idea on what maybe causing this?? I have a new radiator, new water pump and thermostat. Also new heating and radiator hoses. I have not notice any leaks and my coolant level is normal.

[@trustmymechanic]

Usually means there is not enough air flow across the radiator, and a cooling fan problem is probably the issue. Always start with a cooling system pressure test to see if you have an internal or external coolant leak, check upper and lower radiator hoses when engine is at normal operating temp to see if they are the same temp (if not, a radiator restriction is likely) and make sure there are no air pockets in cooling system.

[@olgakukange9589]

Very Helpful thanks. Mine was the Electric Fan

[@mohamedghouse4490]

thanks for your kind information.--Mohamed Ghouse

[@trustmymechanic]

Yes, the water inside the radiator will go up and down slightly, and you should see or might see rise in the overflow bottle on the side. You should not be able to see the "cores" inside the radiator though, those should stay covered with coolant. Just make sure the radiator is full to the top with coolant when the engine is off, and there are no coolant leaks.

[@justchillin1985]

2012 jeep jk. Coolant level is fine radiator is fine can't find any leaks or cracks. My problem is jeeps temp gague goes up after 30min of driving only at low speed or at stops. I can hear the fan get really really loud. After a min or two then temp goes back down to normal. N stays at normal level until i start slowing. Then it does that same cycle again.

[@pinoyrinto]

may car over heats in long driving and noticed that my coolant overflow. i wonder what could be the problem before I bring it to mechanic and charging me repairs that my car dont need.

[@trustmymechanic]

Great, thanks for the update.

[@trustmymechanic]

If you are DRIVING at freeway speeds or basically any speed other than sitting still at idle then I would check your radiator for a restriction at the bottom, check to make sure you are full of coolant in the radiator and there are no leaks. Overheating while sitting at idle or very slow speeds usually is a coolant fan issue, but while driving or at fast speeds is usually a radiator or lack of coolant circulation issue.