Turbo Cool Down (Idle down) Before shut down
Many times it's not done but here's that good ol' excerpt from the D/C Ram Owners manual:
Driving Condition/Load /Turbo Temp/Idle time before shut down.
Stop And Go......./Empty/.......Cool......./ Less Than 1 Minute
Stop And Go......./Medium/................../ One Minute
Highway............./Medium/....Warm....../ Two Minutes
City Traffic........../..MAX../..................../ Three Minutes
Highway............/..MAX../..................../ Four Minutes
Uphill................/..MAX../........HOT......./ Five or more
And obviously if you have a pyrometer you can safely monitor your shutdown temps until 350* (Rule O Thumb) or less is reached.
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