Hissing Sound From Engine?

[salah]

hey guys,

ive got a 96 r33 gtst and got a new clutch 3 weeks ago. when i got the car back after the clutch install i straight away noticed a hissing sound coming from the engine bay, specifically from the passenger side. i went back to the mechanic, they had a look and said its just the clutch parts settling and it should stop hissing soon once the clutch settles in. its been 3 weeks now and its still there. ive noticed that its always hissing, whether on idle or not, and the sound corresponds to the revs, so if i rev the sound gets louder with the revs. i took it back to the mechanic and this time i was told it cant be the clutch, and it could be the turbo (something about parts in the turbo touching eachother as it spins, sorry i forgot what he said exactly). has anyone ever experienced this before? or know what it could be? it almost sounds like an air leak...

[RB25 SKYLINE]

id say it would be a air leak if its only just started after they have put the clutch in.take it to a different mechanic and ask them to smoke test it

[jhjones]

Check the turbo dump pipe gasket.

[t_revz]

Check the turbo dump pipe gasket.

+1

Check exhaust flanges

[Carbon 34]

Turbo gasket leak or intake

They would have removed it to get the clutch out

Find a better mechanic !!

[Moodles2]

Check vacuum lines to the charcoal canister, I know on R32 GTRs it's on the passenger side and mine used to blow hoses off when I hit 10+psi

[salah]

is there any way i can check for the dump pipe gaskets myself?

[GTR-N1]

Check the turbo dump pipe gasket.

Can't you ask your mechanic to rectify this?

[blind_elk]

A leak in the exhaust will sound more like "raspberries", not hissing. "Hissing" will be an air leak somewhere in the induction system.

[StevenCJR31]

Hissing in the engine bay? . . check for snake