Team-BHP - View Single Post - Why diesel engines are revved before switching ignition off?

tsk1979 · 26th October 2005, 14:32

Its needed for turbo charged cars. The if you rev the engine the turbo starts revving at high speed. If you switch off the engine immediately the turbo keeps spinning while oil supply is cut off.
While starting 1 min is recommended as by that time the turbo starts getting oil.
As for the starting part, any engine wether petrol or diesel should not be revved up immediately after startup. The reason is that oil circulation takes time to happen. Thats the reason you have these so called magnetic oils(Remeber castrol gtx magnetic) which stick to engine walls reducing startup damage.

26th October 2005, 14:32	#7 (permalink)
tsk1979 Team-BHP Moderator Join Date: Feb 2005 Location: Noida, New Delhi Posts: 8,350	Its needed for turbo charged cars. The if you rev the engine the turbo starts revving at high speed. If you switch off the engine immediately the turbo keeps spinning while oil supply is cut off. While starting 1 min is recommended as by that time the turbo starts getting oil. As for the starting part, any engine wether petrol or diesel should not be revved up immediately after startup. The reason is that oil circulation takes time to happen. Thats the reason you have these so called magnetic oils(Remeber castrol gtx magnetic) which stick to engine walls reducing startup damage. __________________ Reclaiming.....!