Turbo Cool Down Times
#12
If I am not mistaken, the 6.7L turbo is water cooled. The cool down period for this turbo is very short! As soon as the exhaust temp drops below 600 I shut my engine off. No problems yet! And by the way, they recommend that we should not let the engine idel for more than a couple of minutes before shutting down. As soon as the temp drops on DPF, it sharts collecting the soot.
#13
600? It should drop well below that very quickly as soon as you stop. The Duramax VVT is also water cooled and I can pull off the freeway after a long drive time and the EGT's will drop to around 450 as soon as I put it in park and then down to 380* within about a minute. The Cummins turbo is also similar. I wouldnt recommend shutting down at 600. Even though its water cooled theres no circulation and 600* will cause coking on a static oil very quickly. If yours isnt dropping down to around 400* fairly quickly you might want to get it checked out.
Last edited by DangerousDuramax; 09-08-2008 at 03:19 PM.
#14
I usually shut mine off at *300 also. Pull in the garage and turn off the A/C really doesnt take that long.
#15
That was my point! By the time you get to a rest stop of wherever you are going to park it, it will be in a safe range to shut it off. There is no need to park it and let it run for 5 minutes!
#16
Correct...no need to run it for 5 minutes but depending on the AAT and how hot the turbo is staying you will want to leave it running for 1-2 minutes. Shutting down at 600* is not healthy for your turbo.
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