I remember hearing some time ago of the philosophy of idling a turbocharged vehicle for an unspecified period of time prior to shutting off the engine to allow the turbo to cool down.
Anyone out there have any thoughts on the subject?

 

Whenever my dad drives a diesel vehicle for a certain amount of time(don know wat it is, he has 3 diesels though), he always drives real slow, keeping the rpm's down when he gets near his destination, and then lets it idle there for about a min or so.

 

Yep if you have gauges let pyro drop to 300 or less. No gauges 3-5 min normal driving longer if run hard.

 

yeah idling it down helps the turbo last longer. when motor stops its stopping the flow of oil that lubricates and cools the turbo. can cause coking in the turbo which is burnt oil buildup and its harder on the oil also when there shut down screamin hot.

 

Idling before turning off your diesel is a good practice. With an EGT gauge you can determine the length of time it takes to cool down. I generally let mine reach 300 degrees before turning off the engine. It used to take a couple of minutes with stock exhaust. But now with my 4" exhaust, it takes less than one minute.

 

if i am doing city driving i usually dont let it cool down, but on the highway, i will let it cool down for a bit before shuting it off

 

Thanks, folks. A big help.