slight engine hiss

[adw555]

After each journey, when I turn the engine off I can hear a faint hissing if I pop the bonnet or stick my head down near either of the front wheel arches. It seems to do this every time for a few minutes then stops. Anyone else ever hear this ?. I have the climate control on auto at all times in case that makes a difference..

engine is the 2.0 TSI

[Evil Derboy]

.

[kianok]

It probably the compressor for the air conditioning

[adw555]

Think it might be the after-run coolant pump...supposed to prevent damage to the turbo bearings after shut off.

[sciroccorocket]

i have the same noise i done have a clue what it is tho

[kianok]

Nor me. Does it do it when you when you havent used your air con ?

[adw555]

yes, the noise is there whether the climate control is on or not. I also hear a slight humming noise as if there is some sort of electrical pump running..both noises stop at the same time after 3-4 minutes.

[frenki]

you have to wait at least 1 min until the turbo spins down.

if you don't want to ruin your turbo than wait before turn off. omg

[adw555]

So, the dealer says you don't need to sit before shutting the engine off...these days modern turbo engines can cool themselves down...and I don't see anything in the handbook about it. Asked VW uk and they said the same thing.

However, I used to have a Subaru Impreza turbo that had a sticker on the door which told you to let the car idle for 30secs-1min if stopping straight after high speed running (my neighbours loved this as the impreza at idle was quite loud!)