Turbo On The Way?

[MerlinTheHapyPig]

as per the thread title.

My car has begun to make this high pitched whining or whistling noise. It only happens on boost, so i've begun to suspect my turbo is on the way, like perhaps the noise is the wheel rubbing on the compressor housing or something.

Any ideas? i would have said it was a aircon comrpessor or alternator on the way, but that would probably happen off boost.

it only happens on boost (e.g. it won't happen at high rpm when decelerating)

[TommO]

I'd more be inclined to thinking it's a gasket thats buggered? ie between the exhaust and the turbo Gas comes out on boost, making it sound like a mini-screamer

[Xizor]

How audible is this noise?

[MerlinTheHapyPig]

fairly audiable, you can hear it with windows up, and it's probably loud enough for people walking past to hear, but not really loud

add..

best way to describe the noise, it sounds like a power saw sawing through wood. it's really wierd, anyone else had this?

Edited June 7, 2006 by MerlinTheHapyPig

[R31Nismoid]

either manifold gasket/turbo gasket

or

cooler piping has a slight leak, and a very small one giving the louder noise while only on boost

[MerlinTheHapyPig]

hmmmmmmmmmmmmmmmmm

cooler leak ey... (should have thought of that...) i'd say that's the answer.

my cooler hangs lower than front bar, and i hit it on the side of a gutter the other day (popped hose on bottom of cooler) and from memory, i think this noise started shortly after i fixed that, so i'd say that's the problem.

I have a new cooler kit ready to go on in a week or so, so hopefulyl once i fix that it'll go away.

[barnoon]

My R32 GTST has developed the exact same problem the last few days, it will do it nearly 100% of the time on boost in first gear, 50% of the time in 2nd and less as I go up in the gears, I thought intercooler leak too and checked all my silicon hose fittings etc and couldnt find any leaks but I think ill replace them all anyway as some of them look quite old,

anyone have any idea where you can buy these silicon joiners from, can you just buy them from Autobarn etc?

Edited June 7, 2006 by Dave69001