Turbo Cool Down Period

[clive2]

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hi guys

regrarding the saftey period in which one should exercise before switching an 1.8T off, i have had many conflicting opinions about this. could someone please advise me of this. i have been told a 30sec idle must always be adhereed to before switching the car off, surely this makes sense, but as for the practicality of it it can get VERY frustrating.

please can i have some feedback regarding this.

thanks alot!

[bhb399mm]

unless you're racing around at very high RPMs a cool down period is unnecessary. during normal driving .... and even most fast driving... your turbos wont get hot enough to need a cool down period.

[A3 KID]

Originally posted by bhb399mm@Dec 16 2004, 07:26 AM
unless you're racing around at very high RPMs a cool down period is unnecessary. during normal driving .... and even most fast driving... your turbos wont get hot enough to need a cool down period.

Quoted post

but also in the climate the car is in i would sugest a cool down for the turbo as this will in the long term increase reliability and servicability of the turbo.

[clive2]

thanks for your informed and educated help. i will take stead to your advice

[shaun]

I used to drive a turbo'd escort and the advice i got was to make sure the engine rpm was at idle before switching off, dosnt really answer your question though!

[Nugs]

bhb is correct. 'My understanding' to explain is as follows;

A standard boost turbo will not require cooling unless say you have been on a trackday or somethink. If boost pressure is high the turbo works harder and heats up obviously (ie like rally cars when they glow they are so hot). If the engine was switched off then the metal cools too quickly damaging seals etc and thus damage long term can be caused.

For a standard Audi turbo I doubt it will ever get that hot or hot enough to require idle before being switched off.

I use a standard Volvo T5 hard most days and have never seen it need cooling or need seals/turbos replaced.

[DRIFT4]

its not a must BUT if u can,y not.wont hurt.
i know that a ball bearing turbo doesnt need to b colled down.
not sure wut A3 got???!!!

[fritz777]

Hi there, spoke to a couple of Audi mechanics, and they all said the 1.8T does not need a cooling down period ... just my 2 cents.

[lee-essex]

my s3 has a over run even when i turn the engine off there is a cool down prosess .goes of gfor like 5 mins befor the car completly turns its self off (scubbys skylines eveos all have thes) does your car go completlty quite after u trun off the ignition. if it does its diffrent from my s3 and mabi u could get the over run off a s3 to sort your issue