RAM 2500 Turbocharger Cool down - How long to idle

Cooling down the mighty 6.7L Cummins. Recorded times and temps.

[@SoCalWatcher]

So nice to watch your videos with great information. I use to be a firefighter and drove fire engines for roughly 10 years. While learning about diesel engines and such, it was always mandatory to back into the station and cool down our engines for 2-3 minutes. That was always mandatory. To this day I still cool down my engine out of habit from the olden days. Thanks again

[@dolivares81]

Sorry for your family’s loss, thank you for the information. All the best to you and yours!

[@MarionBlair]

Much appreciated

[@ki6lkp]

Very sorry for your loss. He looked like a very cool dude. 🇪🇭

[@MarionBlair]

Thank you very much, he was very dear to me, and in nearly every video I've ever made.

[@desertdog2282]

Came back to watch this again, need to refresh my memory now and again.

[@carl2591]

just happen to see you from cummins forum and wanted to check it out.. currently in a 2003 7.3L ford looking to make the jump to cummins. your cooling info is right on point. when i was OTR driver the shop recommend we let truck idle for at least 5 mins before shut down to cool turbo. this was in 1982 on a 290 cummins . Was saddened to see the loss of Killer.. sorry for your loss.

[@MarionBlair]

Thank you

[@paulzumpf3612]

I work for a company that has 94000 trucks world wide. They also have a zero idle policy. In 26 years of driving I've had one turbo failure and it had 800k miles on it. This experience has made me rethink some of the old school practices.

[@MarionBlair]

Yeah that's a good point, with the water cooled turbines it's probably not necessary at all.

[@miguelitomigra543]

Another great vid, thank you Marion. I've swapped out the stock VGT for a BW 364SXE and love it. Nevertheless, the answer to your question is easy. Idle down until you see around 350/375 degrees egt and shut down. Just that simple. No long winded videos necessary. ;-)

[@normnilsson7208]

I just bought a 3500 dually, I don’t know enough of this subject to comment but I appreciate the info. Regen and thermal syphoning. Is new info to me. Thank you !

[@MarionBlair]

Thank you

[@streetchicken5738]

My 04 5.9L Laramie had old school gauges galore. My 18 6.7 Laramie has a OBDII type monitor. I monitor @ EGT1 to under 500 (when no tow) for shutdown. I mostly run around town (15 months 11K miles) . Regen seems to be every 4000 +/- I just made up 500 degree shut on the 2018 to mimic characteristics on my 2004 cool down process. Driving habits remained the same and 500 degrees seems to be where the 04 and the 18 driving habit temps aligned. Just happened to be 500 degrees. Close enough for the ok to shutdown under normal conditions for me. Love the videos. Sorry about the dog. MPG seems to be around 16 in town. I have to go search your oil change video again. It's about that time and $ is tight. Thanks for posting. I appreciate seeing the hard numbers vs my seat of the pants.

[@MarionBlair]

Appreciate that. Ha, I made up 400 deg. These turbo's will fail from something other than a hot shut down IMO. The nice thing about the water cool turbines is the water continues to circulate after the engine is shutdown so it continues to cool the oil and bearing. So your turbo bearing and oil is not seeing 500 degrees.

[@jmjv0077]

Great video with data to back it up. Sorry about your pup, that situation really hits home for me.

[@18S12]

Thank you for all the information!

[@jd3953]

As always great information!

[@rjl7765]

thanks, well done video. Been watching your videos for a while now. I recently bought a used 2016 3500 Longhorn with the 6.7 after selling my 2003 2500 with the 5.9. So I am new to the whole re gen thing. I always let the turbo cool for a few minutes at least after highway speeds. Sorry about killer that part sucked.

[@MarionBlair]

Thank you

[@CommanderRobe3t]

Great job with the data!

[@MarionBlair]

Thank you appreciate that

[@securenc1]

Marion, your vlogs are always appreciated and extremely informative. I always follow your recommendations because you remind me of Gale Banks in the sense of always backing up your findings with actual data and research. Very sorry to hear about Killer, I wouldn't know what to do if I lost my little shotgun rider. Looking forwards to your next video...

[@MarionBlair]

appreciate

[@AD-zy5gr]

Another great video Mr. Blair! Sorry for your lost.

[@MarionBlair]

Thanks appreciate that

[@mikestrucks]

Good video sir. I’m sorry for your loss

[@MarionBlair]

Thanks much

[@pmtips4482]

I'm sorry for your loss.

[@edwardnelson3304]

Thanks Marion, because I have no indication and know nothing this is a gray area for me. The biggest indicator I use is oil temperature, not too big a problem in mild temperatures but in Florida where half the year is 94-100° OAT.....the oil temperature will run 199-203° with the truck empty so when I get ready for shutdown it takes between 5.5-10 minutes for the oil temperature to drop down on a hot day to 197 or a mild day into the 180s, then I'll give it another 30 seconds before shutdown. I don't like not having a EGT reading because I accumulate idle time on the hour meter and it lowers cylinder pressure, so it's a compromise.

[@MarionBlair]

With the water cooled turbine, it's not that critical. 10 mins will probably cover any towing condition and 5 for empty.

[@Rivergames5]

Hate to hear your friend was lost. They are very special to us. Always enjoy your vids and appreciate the technical data.

[@MarionBlair]

thanks so much

[@francissullivan6400]

Sorry to hear about your dog..you gave it life..better thsn most

[@MarionBlair]

Appreciated

[@darrelltrammel1623]

Thanks for the info!

[@ki6lkp]

Marion, pardon me if you've mentioned this already. I've discovered that most Ram/Cummins owners are not aware of the high idle feature via the cruise control. If I'm idling for more than a moment, I like to bump it up a notch or two.

[@MarionBlair]

No, I have not mentioned thanks

[@RobShutt357]

When did they start with water cooling? Mine is a 2016

[@olvinyldude]

Great job again, Sir ! You bring a great point, a lot of people never even think of this..Diesel is a whole different thing..We just got back from the Black Mesa, (Out in Panhandle, foothill of Rockies) towed our 40' bumper pull RV, which is about 9,800 lb. Did so well !~ Love our RAM 6.7 Turbo Laramie Longhorn 3500 ! Would be lost without the Beast! Thanx for sharing great info!

[@MarionBlair]

Appreciate

[@olvinyldude]

@@MarionBlair Yes Sir!

[@jeffreygalle]

When oil temps are in the 110 °C range, personally I like to open the hood and turn the heater on max heat for 2 minutes or so and call it good. I’d like to see the difference between these two methods though! Nice video and analysis.

[@MarionBlair]

2 minutes seem low. Opening the hood will help some however, I would think but how much it aids in cooling the turbo would be interesting. yes. thanks.

[@MKSPerformanceOffroad]

Egts come down pretty quick on these newer trucks, even after towing its pretty surprising. I normally monitor egts in the manifold near the center or if its deleted then the back plate. These areas should give pretty good readings as well but that idash looks to be a pretty sweet tool for those that want to plug and read info. Good video! Enjoy watching your videos sir.

[@MarionBlair]

Thank you for that. I'm a data nerd, ha. Yea, I wish RAM installed a pyro in the manifold.

[@edwardmachado3957]

Thank you Mr Blair

[@sebastiansanchez7185]

Great video. Are you monitoring the factory EGT sensor or an aftermarket sensor on the manifold? And when you idle, are you at fast idle?

[@MarionBlair]

Factory, I don't fast idle.

[@francissullivan6400]

Great video..you CARE ABOUT your truck..these young idiots beat,mod and dont maintain them...diesels are I HIGH END woman...if you dont treat them right..they'll leave you

[@MarionBlair]

Ha, that's the truth

[@nugnug9447]

Hi Marion. I have a 2018 RAM 6.7 auto trans. I have seen regens towing at 60 mph in 5th gear out here in Arizona. I've also seen them empty at highway speeds. I almost always drive on the highway, never do "grocery" runs. Thought you'd like to know.

[@MarionBlair]

Yea, mine will regen when towing depending on EGT. If I keep it above 900, it'll rarely regen while towing.

[@brenteason9891]

Sorry for your pup loss. That’s some serious pain. Take care.

[@MarionBlair]

Thanks much

[@Running_To_Something]

Another great video Marion. I don't have a dash computer, so I've been using the coolant temp - same as you, I've been shooting for 200 degrees. As you mentioned, sometimes even at idle it will be 201-202 in hot weather. Sorry about "Killer" - It's hard to lose a pet.

[@MarionBlair]

Yes, BTW, nice airstream.

[@Running_To_Something]

@@MarionBlair We love it!

[@arniekermeen3920]

hi from squamish bc canada love your videos keep them cumming .LOL

[@Longsnowsm]

Do you think the Banks iDash is the most effective way to monitor these temps? Trying to decide if this is something I should buy. How frustrating that we can't get a straight answer from either the dealers or the manufacturer.

[@MarionBlair]

Yes the idash is good so is the edge insight. If you want to record data, the banks idash data monster is the clear choice but the edge is better built but not good for recording more than a few minutes. You don’t need either if all you are interest in is cool down. Just idle for 5 minutes after towing. There are other options around. A Bluetooth adapter with the torque app on your phone is a low cost way. Don’t believe iPhone supports it though.

[@TCB031]

Thanks for another great video Marion. I try to let my turbo cool down before shut off when towing, but your iDash sure looks like a good way to go. Any review of it coming? I'm sure sorry to hear about the loss of your dog. Our pup sits on the console of our truck when we travel, and I can't imagine travelling without her.

[@MarionBlair]

I think it's time for a review. thanks.

[@monsterram6617]

I always let the EGTs get down to at least 350°F before every shut down. 👌

[@victoroliveira3256]

Me too my father thinks I’m crazy for waiting to get out of the truck.

[@dashiell3405]

Me too, at least 350

[@MarionBlair]

Yeah my wife's always bitching at me to hurry up.

[@donthurman8189]

Marion, thanks for the video. I don't have a egt gauge, so I go by the cool down times in the owners manual, and try to get the coolant and oil temps down. As the truck idles cooling the turbo I notice the transmission temp begins to rise quickly as I idel my truck.. What temp. ranges are detrimental to the transmission ?

[@MarionBlair]

Keep transmission below 230, preferably lower. Synthetic should go to 260 but I wouldn't test it.

[@hardtruth2039]

I ALWAYS idle for 3-5 minutes or until my EGT1 below 400 before shutting down. I also plug my truck in everyday and it's on for 8 hours every night. So when I start the truck it's at 145 so I don't have to wait for the engine to warm up before leaving the house. When I leave work or anywhere I make sure the coolant temp reaches is at least 115 before the truck moves. Even then I take it easy until the truck reaches 180-185. I know this is probably overkill but I want this truck to last.

[@MarionBlair]

One of my old trucks I installed a preluber that would circulate the oil thru the engine before starting. But I wouldn't do that now. My truck will outlast me I'm sure, ha.

[@wayneowens7059]

I’ve been a Diesel engine mechanic for many years and your approach is dead on, I’ve seen some 1,000,000 engines where the owners would not move the truck till it reached operating temp.

[@MarionBlair]

@@wayneowens7059 appreciated

[@bobabooie6389]

Hi Marian if you pull in to get fuel and you don't have a lot of time to let it I cool down before shutting it off is it okay fill up with the engine running?

[@MarionBlair]

Absolutely that's what I always do and most people with diesels

[@afluffypinecone3577]

Never ever fuel with your engine running. Fueling with the engine running is illegal in most states. As for semi's, it's rare to see a driver fuel with his engine running. You might do it in frigid (

[@MarionBlair]

@@afluffypinecone3577 Yea, that's probaby right. I shouldn't be spreading my bad habits.

[@71ngel]

It is illegal however if you do care about the life of your truck just go ahead and do it Diesel is nowhere near as flammable as gasoline. But on the other hand like stated in the video usually driving slow speeds will cool it enough where you dont have to worry about it. Ex. Driving on the highway exiting and driving 5 mins to fill up is plenty of time for the truck to cool down enough. But I still do it lol

[@MarionBlair]

@@71ngel That's pretty much how I feel. The flash point of diesel is way up there.

[@slipf18bustedflush42]

Sorry to hear about your pup...our border terrier is a member of the family...we understand the grief you must be feeling. We don’t deserve dogs...they are the better part of our spirit and serve to help keep us sane and honest. Another informative and useful video, Marion. Thanks.

[@MarionBlair]

That is so true

[@sac_colorado7215]

Marion, do you leave your truck running in fast idle ~1000rpm when you fuel up or after hard towing (in park, foot off of brake, with cruise control on. and then push the cruise "set" button)? I find that when I've towed hard - 14,000 lb 5-th wheel with a 17' ram 3500 in the Colorado mountains that the turbo seems to cool down faster if I run at fast idle for several minutes and then go to regular idle for a minute, or so, before before shutting down. I've been trying to get my turbo to 350F before shutting down. Thanks for your videos!

[@MarionBlair]

I've never tried that but I'm going to now. Very interesting, thanks.

[@sac_colorado7215]

Marion, I'm not sure if the fast idle works the same on your '14 as on my '17 but I use it ALL the time to cool down my truck. Again, you must be in park, foot off of brake, cruise control on, and push the cruise "set" button - ~1000 rpm, (as soon as you put your foot on the brake the fast idle turns off ) then push cruise "res" button and you can push it multiple times to bring the fast idle up to about 1500 rpm. I've read that if you are going to idle your truck for long amounts of time - if you idle at 750 rmp (normal idle speed) that the Cummins can build up soot in the EGR (I think) and if you idle at the fast idle it will minimize soot build up. My owner's manual even states that if you idle your truck for extended periods the truck will automatically go into fast idle.

[@sac_colorado7215]

Also, the fast idle vs normal idle might have a dependency on altitude (thinner air). In Colorado, fast idle seems to bring the turbo temps down faster. I was recently towing in Wisconsin (probably 800' above sea level) and my turbo seemed to cool down faster than when I run at higher altitude in CO. By the way I live at 5000' in Colorado and mostly tow in Colorado usually well above 5000'.

[@edwardnelson3304]

Thanks so much Marion. With No EGT monitor, using only coolant and oil temperature is the idle time at idle or the fast idle with through the cruise control? Question 2 is if it's not in regen after you park, what is the ticking I hear like it's still trying to inject DEF into the exhaust? If you could elaborate on both of these I'd really be grateful. Blessings.

[@MarionBlair]

I let it idle. I've never compared the temp drop idle vs fast idle but sounds like something I should do. Cummins/Ram says fast idle (when idle for long periods) to increase (not decrease) combustion temp to reduce varnish like build up in the cylinders, valves etc... But I've heard some say it cools down quickly with fast idle also but can't confirm. As to the DEF pump, it will pump independent of the regen based on NOX emissions (even after regen is shut off). I hear my DEF pumping a lot when towing (higher NOX) and refueling. Another ticking sound is the rapid cooling/ contraction of the DPF when the regen is stopped.

[@edwardnelson3304]

@@MarionBlair Thank you again Marion, I'm grateful for your insight as you have a great deal more experience with this engine than I do and proper care of it is my goal.

[@grandlakephil]

Sorry to hear about Killer.

[@motohobo8826]

How hot does your oil and coolant temp get while towing? And how hot is too hot on these trucks?

[@tootallsvlog103]

Depends on how had I'm pushing but oil normal maybe 203, coolant higher. I back off when coolant gets to 206 or so. Synthetic will do better if you pull hard and heavy.

[@MarionBlair]

Got to 218 this last summer.

[@caseyriggs2633]

If the vgt veins are sticking, how will the truck react?

[@MarionBlair]

The holset doesn't have individual vanes, they are all part of the entire nozzle which slides back and forth allow more or less exhaust to spin it depending on the boost requirements. So, it depends on the position it was in when it failed. You will get a code which is the most obvious indication. The turbo nozzle has to be able to slide to hold back pressure on the EGR otherwise the emissions will get out of sync and thus codes.

[@prjgrudge]

My 2018 2500 doesn't show the EGT. How do I find the EGT?

[@Kusoka1]

I installed an edge CTS 2 monitor on my 2018 2500. Must have in my opinion.

[@sticrzy123]

prjgrudge Cheapest way is download Torque Pro for like $5 and buy a Bluetooth OBD2 Scanner device , it shows you more than most scanners that cost 50x more

[@cwilks5592]

I use the Blue Driver OBD tool. Great diagnostic tool along with realtime customizable gauges.

[@johndevos9003]

Sorry about your dog, so sad. Another very informative video.

[@Richard.Hybels]

Sorry about the doggie. It’s a real bad day. I’ve put two down and my current riding buddy is 14 or 15 so I’m gonna go thru it again.

[@MarionBlair]

Thanks Richard

[@sumnerkinney2166]

Great content!!! So sorry about your dear friend.

[@MarionBlair]

Thank you

[@bucky1996]

Thanks for the turbo class. Good info. Sorry about your pet. They are family for sure I would like to share this with you : It came to me that every time I lose a dog they take a piece of my heart with them. And every new dog who comes into my life gifts me with a piece of their heart. If I live long enough , all the components of my heart will be dog, and I will become as generous and loving as they are. Unknown Author

[@MarionBlair]

I think you articulate my feelings exactly. Thank you for that.

[@steveellis2279]

Do you leave your truck running when you fuel up while towing or wait at the pump for several minutes and then shut down and fuel up?

[@Dunki113]

If I'm correct diesel trucks don't need to be turned off at the pump since Diesel is combustible, you can throw a match into a cup of diesel and it would put the match out while gasoline is a different story

[@AString95]

I never shut down the engine when I’m fueling up for diesel.

[@MarionBlair]

Yes, diesel has a very high flash point. I don't shut down.

[@steveellis2279]

@@MarionBlair Thanks

[@wlrottge]

The problem with a hot turbo is only related to the oil. The whole reason too let the turbo cool is to get it below the coking temperature of the oil. If the turbo is too hot and you shut down, you will essentially burn the oil in the bearings/journals and this now solid burned oil wears on those parts.

[@MarionBlair]

Exactly

[@88ranchok]

How do you know it's in region

[@MarionBlair]

You don't unless you have a gauge, just have to use your watch and go by time.

[@ictpilot]

Bet if you call Gale Banks or talk to one of his techs, they'll give you good information.

[@MarionBlair]

Thanks, I do communicate with them periodically. There are a few bugs in the Idash 1.8 that I'm working with them on.

[@ictpilot]

@@MarionBlair 😁👍 I envy your conversations!

[@wizard_of_poz4413]

I was under the impression that the ram cummins uses the late injection method which is spraying that extra fuel right into the cylinders

[@MarionBlair]

Yes, for regen, on the exhaust stroke.

[@wizard_of_poz4413]

@@MarionBlair yea that's a terrible time

[@Kusoka1]

I shut mine down when EGT1 reads 400f or less

[@Kevin_Q73]

Same it drops to 400f and it’s shutdown time for me

[@alfonzooliviera1121]

You know they mentioned you in Turbo Diesel Register this quarter?

[@MarionBlair]

That's interesting, wonder what about.

[@alfonzooliviera1121]

Marion Blair your hand dandy helper tool for chaning the oil filter. Your “third hand”

[@MarionBlair]

@@alfonzooliviera1121 Oh, was it a positive comment?, ha

[@Gregamz]

Prolonged idling May bring down your EGT’s but is waiting to get down to 350 degrees actually counterproductive to engine longevity? I would direct you to the AdeptApe video on idling your diesel. kzbin.info/www/bejne/nqfJfpSiasuFm6M&feature=share

[@MarionBlair]

Could be 400 is what I use

[@bobabooie6389]

Hi Marian sorry to hear about you your little baby there that's too bad I love dogs myself

[@MarionBlair]

Thank you

[@toddhefer6084]

God Bless in Jesus Christ Name Amen.

[@AlaskaErik]

The new GM HD trucks will not shut off if the engine hasn't cooled down sufficiently.

[@MarionBlair]

Wow, It's about time they put that on the engines. Although I would prefer to have it shutdown automatically while I'm out of the truck in the bathroom, ha.

[@AlaskaErik]

@@MarionBlair It will shut down automatically.

[@MarionBlair]

@@AlaskaErik Nice, maybe ram will follow.

[@leehendrix8787]

@@MarionBlair often times I shut it off for just long enough to get out then remote start it and run in to grab whatever or use the restroom and then head on my way.

[@jackorwick]

The old lady just isn't into that.... amen brother.

[@18S12]

Who are the miserable souls who would give one of Marion’s ids a thumbs own?

[@arniekermeen3920]

aww rip to killer your shotgun rider i'm sorry to hear your loss MR.Blair

[@MarionBlair]

Thank you much.

[@greg9323]

Highway driving empty or towing I will give it five minutes. In town empty, three.

[@MarionBlair]

Yea, that pretty much what I do.

[@bobabooie6389]

Dog spelled backwards is God

[@MarionBlair]

Good point. I pray that God will reunite us with them when we go.

[@bobabooie6389]

@@MarionBlair he will on the Rainbow Bridge

[@awsdws7727]

Blah blah blah. Put in a pyro and turn it off when it reaches the right temp. 90 percent of the time a slow run into a town temp is down anyway.

[@MarionBlair]

Not necessary to drill and tap manifold , sensors are already there for safe shutdown temperatures. Shut down temperatures are not nearly as critical with the oil water cooled turbo as the oil only turbos since the coolant continues to flow after shutdown protecting the turbo bearing and oil from excess temperature

[@awsdws7727]

@@MarionBlair pyrometer is an exhaust temperaturegauge that allows you to read an immediate change in exhaust temperature by receiving atemperature signal from a probe (thermocouple) that is inserted into the exhaust manifold. The video is about rundown times that's the best way to do it.

[@MarionBlair]

Yea, agree, manifold pyro would be more accurate for engine exhaust temp. I don't have one so used EGT1 thru the OBDII. Close enough for cool down, I would use it at the drag strip, ha.