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engine hiss normal?

jp_cfc09

Ready to race!
Location
northern ireland
Hi when I switch my car off after a drive there is a small hiss every few seconds for a few times, is this normal. If I start and switch off on the spot theres nothing so only after I drive which I take is a vaccum releasing its pressure. Is this normal and just something releasing pressure thats not needed now as its stopped. If not then maybe ive got lose hose, The miss said ive lost the plot untill she finally heard it lol.

I know its nothing serious but id like to know, as my last car (mk5 astra) had a hiss when under load on 2k revs. Which pissed my off on the motorway, was told it was normal by the dealer but doubt it was lol. Never found out why and they didnt know as they were talking BS.

Its a 1.6 tdi dsg, its nothing loud just a small hiss.
 
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