Unusual Noise On Boost

[rgr34]

noticed on weekend when car reaches 8 to 10 psi of boost i get this weird noise all of the sudden.... it hard to explain its like a metal screeching noise......car runs fine. only does it on higher boost......car has stock turbo running 11psi from turbotech boost valve...could the turbo be on its way out or a boost/vacuum leak?

[Granthem]

Could be many. I had the same noise though and all my bolts holding the turbo to the manifold had worked lose and the gasket wasnt sealing.

Luckily the gasket was still fine and a simple socket on the bolts fixed my problems

Check all your gaskets for one.

[The Dan]

  Granthem said:

Could be many. I had the same noise though and all my bolts holding the turbo to the manifold had worked lose and the gasket wasnt sealing.

Luckily the gasket was still fine and a simple socket on the bolts fixed my problems

Check all your gaskets for one.

+ 1

and check the turbo for shaft play while you're down there.

[DECIM8]

If you in need of a turbo I have one.. Sydney.

[bozodos]

hmm mine does that as well, i thought it was normal :S only started happening after we replaced the shitty aftermarket manifold gasket with a genuine one, to get rid of a shocking exhaust leak.

[Abo Bob]

Sounds like an air leak. Check all hoses and connections. Sometimes a hose will split on the underside due to age and you can't see it.

[rgr34]

thanks for response when i get some time i will check all hoses/bolts and check the turbo....

[bozodos]

which sort of hoses specifically, cooler ones?

i've got a new v-band to put on as well, hope that might fix it too

[race_snooze]

same noise with a cracked and loose exhaust manifold.

[bozodos]

oh the joys of imports. Pretty sure its not the exh manifold on mine, looks pretty solid on there, but will go out n have a poke around the engine bay in a minute, got most of the leaks i can find fixed, just have to do this V-band!

I actually thought that KKR turbos were meant to scream on high boost for some reason lol ;s

[Granthem]

I had to put the heat shield off and walla. Could move the turbo up and down. Once it was all back together its amazing how quickly it builds boost. I guess over time you dont notice your reponse slowly dropping...

Thats probably the more extreme case, but the little lugs just couldnt keep the nuts in place.

[race_snooze]

  bozodos said:

oh the joys of imports. Pretty sure its not the exh manifold on mine, looks pretty solid on there, but will go out n have a poke around the engine bay in a minute, got most of the leaks i can find fixed, just have to do this V-band!

I actually thought that KKR turbos were meant to scream on high boost for some reason lol ;s

If looks could kill... Dosent hurt to put a socket on and see, mine was finger tight on the last 3 (near No 6)

[Granthem]

  race_snooze said:

If looks could kill... Dosent hurt to put a socket on and see, mine was finger tight on the last 3 (near No 6)

Is that all ... I undid 3 of 4 nuts with my fingers