The Rig

iTrader: (13)

Classic WRX running standard Td05 turbo , 115k.

From 0.5 to around 1 bar when boost kicks in I hear like a screeching , after 1 bar it quitens down but still there. It's done this for yrs

No boost leaks I can find

Turbo on its way out ?

Pulls well and no performance issues

Cheers

1509joe

iTrader: (2)

Up pipe gasket.

96sti

Have you checked for any play in the shaft?

The Rig

iTrader: (13)

Haven't checked turbo shaft for play yet , does that require turbo off or can you check whilst on the car ?

Sounds too metallic for gasket leak tho

1509joe

iTrader: (2)

Would put money on it. Pig to find and it does sound metallic

JDM_Stig

iTrader: (3)

If the up-pipe`s been blowing a while you should start to see signs of carbon where its leaking.

The Rig

iTrader: (13)

Ok , will check up pipe and area , would be nice if it's up pipe gasket , saves cost but pig of a job I bet !!

Will get missus to rev to around 4K whilst I'm under checking , should feel some leak if present I guess lol

1509joe

iTrader: (2)

Its usually the top one that goes and it is a pig to find

The Rig

iTrader: (13)

AS it's as a pig of a job might be ideal time to fit a Harvey up pipe

1509joe

iTrader: (2)

Would be an ideal time its not that bad of a job Did you look.

The Rig

iTrader: (13)

Haven't had chance to look yet , 3 kids keeping me busy lol , hopefully next couple dsysv

Bazil_SW

iTrader: (4)

I had something similar on my car. The noise started last year in November, sounded like screaming from under the bonnet at 4k rpm and above, no apparent ill affects for a while, then I started getting exhaust fumes in the cabin, which got worse as time went on and more noticeable after hard driving.

The gasket between the turbo and the downpipe had developed a tiny crack in it. Couldn't see anything until I took the downpipe off, no carbon deposits etc on were visible on the outside. New gasket was 12 quid delivered from icp eBay.

1509joe

iTrader: (2)