Letting the Turbo Cooldown vs Just Shutting the Truck Down.

Wait to you lose a turbo....what a mess.

 

I do and always have. I let my truck idle for about 10 minutes before I shut it down.

 

Just takes out the $10k aftertreatment system instead. Can't win.

 

Dad used to turn on the fan and let run at 1,100 while filling out the logbook, then idle for a minute or 2 before shutting down.

Its not only for the turbo, once the engine shuts off, the water pump stops circulating coolant and all that heat soaks the block and head. Getting the water temperature down as much as possible will limit the amount of heat that will be concentrated in the engine once its turned off.

 

Buddy of mine would open the hood and run it for about 5 minutes on high idle, let the heat escape - then shut it off.

 

Early Maxidyne turbos [early R600] did not have pyrometers until later but they all had a warning on the dash saying to idle for 3 minutes before shutdown. it was to avoid cooking the oil in the turbo once it stopped flowing.

There is an aftermarket resivour with check valve for turbo autos that floods oil to the turbo on startup as they spool up dry until there is oil pressure too sounds like it would prolong turbo life.