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Ut oh
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Discussion Starter #1
Everytime it comes on boost theres a squealing/mettalic noise coming from the turbo, the turbos an uprated t35 jobbie with less than 1000 miles under its belt, the car hasn't lost any power just developed this loud noise.

One thing i did notice on closer inspection is that at least one bolt has sheered off the exhaust manifold so i'm thinking it might be a leaking exhaust manifold and hopefully not a rubbing turbine wheel.

Anyone heard of this problem, got any ideas or know what a leaking manifold gasket sounds like?
 

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sadly thats quite common on the GTS due to the heating and cooling cycle. Its not terminal but not cheap either. It can be sorted without too much of a strip down though
 

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Ut oh
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Discussion Starter #3
it had just spent a half hour or so on the dyno doing 2 full power runs and alot of general setting up, you think thats my problem then (manifold)?

Its just that it surpised me how loud the noise is and its a real mettalic kinda noise.
 

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Ut oh
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Discussion Starter #5
aha.....yep thats the problem, i turned the boost contoller off (actuator boost 0.8bar and it was a bit quieter).

Thanks bud you've put my mind to rest..:) ...now i just need some cash to fix it.
 

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No probs, things are invariably not as bad as they seem.

Its still a pain though

:paul
 

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Snapped bolt?

Nasty.... Had the heat shield off mine last week and one of the nuts had fallen off and was sitting staring at me on top of the turbo shaft. Was looking at it thinking 'What the F*** is that doing there, nothing is attatched to it?' until I realised it had fallen off the stud above it. Irrelevant maybe, but it gave me a fright.
 

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Ut oh
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Discussion Starter #8
Well things just got worse today, had the turbo off to check everything and.....arrrgghhhh somethings gone through the turbo intake side, killed the compressor wheel, gouged the compressor housing and god knows what other damage its done.

So its been boxed up and sent back to the maker for a rebuild...thats 2 turbos i've gone through now....needless to say i shall be rerouting the recirculating dump valve and fitting a catch tank as well.....all in all not a good week...:( :mad: :(
 

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Mate, thats unfortunate, where is it going for a rebuild? TurboDynamics did a cracking job on mine. Case machined out bigger internals and needle rollers etc

Paul
 

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Ut oh
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Discussion Starter #10
Its going back to turbotechnics who sold it to me in the first place, it was a t35 jobbie..same spec as what they put on escort cosworths as a hybrid good for around 450bhp so i was told.

Since the damage happened on the dyno and its the garages speculation that something went through it they've agreed to do everything they can too keep the price down...suppose thats the gamble you take when dyno work is done...:rolleyes: ...gutted.
 

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thats a bit odd though, If you are running an air filter then normally that sort of thing is caused by loss of a spark plug electrode or something like that. If that is the case it was likely or not running really weak to burn that off. Any idea what it was?

You'll need to check the compressions at the very least to make sure it hasnt damaged a valve or valve seat on its way the way through

Paul
 

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Ut oh
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Discussion Starter #12
hmmm i don't really know, the cars at the garage still...it was running fine off boost though after the incident with no missing or anything.

i was thinking it was something from the recirculating dump valve as that goes in right in front of the turbo as well.
 

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oops, didnt read it was compressor side... still strange though dont you think if the filter was on... what ever it was would have still had to travel through the system and out though
 

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Ut oh
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Discussion Starter #14
I was very surprised when they told me....good point about it travelling through..i'll have to make sure the culprits not hiding in the intercooler or piping.

Do you think the force off the dumped air from the dump valve could of done it...she was at 1 bar on the t35 when it happened and giving some real seriously loud whosh!
 

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Ut oh
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Discussion Starter #15
Basically one off many things i was thinking might of caused it was the dumped air unbalancing the compressor wheel.

but then again i think thats just wishful thinking..:rolleyes:
 

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T35 internals which i have a modified varient of are capable of 1.5+ bar on mine, id be seriously suprised if that was the case. I think the important thing is to find what it was. If you still have a cat it could well be embedded in that too

Sorry for the slow reply I had to pop out for a swift pintlet or two

Paul
 

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Ut oh
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Discussion Starter #17
nope cat free here, the exhaust side wheel came through the ordeal unscathed...some decent investigation will take place during refitting and run up next week though.

Its all a learning curve i suppose.
 

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Very true. What ever it was may have broken up when it hit the compressor wheel. I think you can count yourself lucky if thats the case and there is no other damage
 
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