2nd Gen Non-Engine/Transmission EGT Cool down time

[dfriend]

For those of us without gauges, what is the importance of EGT cool down, and is there a rule of thumb for the time at idle for EGT to get to a reasonable temperature.

 

[JBlock]

Check the Owner manua;

The Owners manual show less than minute for light loads

up to: 5 minutes for maximum gross weight Towing at freeway speeds.



I put a gauge in and my wife loves it.

 

[jeepit]

Your operation guide in your truck manual shows a chart to go by.

 

[EMDDIESEL]

I have found that 60 seconds at any outside temp is enough to get the temp to 300degrees. I dont tow, so i cant estimate the time after pulling a load.

 

[BV]

Turbo cool down

The importance of the cool down is because you have a turbo which is very hot (especially after towing up hill) and if you just shut it down you end up coking the bearings which means you bake the oil in the turbo bearing to the point that it becomes more like paste or worse and that is not good for you oil or turbo.

 

[jwdeeming]

BV's got it right. The diesel mechanic I talked to said oil "burns" above 400 degrees, so you don't want it just sitting uncirculated in your turbo after a hot shutdown.



I concur with EMDDIESEL on shutdown time. I have the ISS Pro Turbo Temp Monitor (automatic shutdown after pre-turbo EGTs drop to 300 deg). In all kinds of air temps and running conditions, I don't think I've ever noticed it taking more than 60 seconds to reach shutdown temp. In "regular" driving conditions, it's almost always 20 seconds or less.

 

[Dkevdog]

I have both pre and post guages- and after pulling a fifth wheel up a grade I've seen it take between 5 and 8 minutes to cool down to 300*. If you tow or haul a load, get the guage, it's cheap insurance.



Kev

 

[Koa Man]

I have just a pre turbo gauge, but my truck almost always takes about 1-2 min. for normal driving, not towing, and as long as 8 min. after towing up a hill. Average time for me (usually towing) is about 2. 5 min. I have a climb up a pretty good grade, short downhill and about a mile of level road to get home.

 

[Car_nut57]

Cool down times vary greatly from truck to truck depending on how the truck is equipped and used. Trucks with big exhaust for instance will generally have lower EGTs while in use and cool down faster than those with stock exhaust. The only reliable way to assure proper cool down is to install the gauges. We recommend the EGTs be taken pre turbo and all the EGTs to reach 300F before shutting down.

 

[MBean]

Dave...

Thanks for providing me with the data that we discussed over the phone. I'll call and see if we can schedule some time when I pass through the Pasco-area. Just so you know, it'll be around the beginning of September. Thanks! HOO-AH!

MRB

 

[Bob Cochran]

I have my pyro in the exhaust and the bottom of the Autometer is 600*. When not towing it goes below 600* to bottom of guage almost immediately. I guess I should use my Turbo saver to idle for 1 minute anyway just to be safe.

 

[Ron Bissett]

cool it ?

The time in the owners manual is with the A/C off if you leave it on the temp will never go down to 300 summer temps. Ron in LOUISVILLE KY:-{}

 

[Bob Cochran]

Ron Bissett ~ right on that is what I do from now on. when AC on and 115* it will be needed!!! thanks.