Screeching Noise! Turbo???

[The MoffMeister]

think we're doomed im still covered by warrantee its just the agro of getting it done!

 

[YerMother]

Same here, it's just the hassle!

 

[225]

http://www.seatcupra.net/forums/showthread.php?t=42054&highlight=screech

 

[YerMother]

Could be normal then! Just that i've never heard it before! It still goes well like i've said! I have a RR in 2 weeks so might be able to hear it better, and also see if there's a problem or not!

 

[The MoffMeister]

same here though im dam sure i never heard it before still pulls but only to 130mph then bit slow and slow on pick up, i did hear though that when i had my evo trial the ecu resets back to revo standard not seat standard but think i will make sure the cars alright seems as though somethings going to go bang!!

 

[The MoffMeister]

read that link from 225 but there all talking bout turning down boost my LC is standard so cannot do this however i have changed my dv to a forge one so what now?

 

[YerMother]

Check for obstructions in the intake system! Clean air filter etc!

 

[The MoffMeister]

must admit took all that apart and think!! noise was there before was doing 130 earlier and took a while to pull further I TELL YA IT JUST AINT RIGHT!!

 

[YerMother]

If your car is standard mate i wouldn't expect it to pull quickly past 130. Sounds around right to me!

 

[dsmithmobile]

My car is an octy vrs and wasn't under warranty so i replaced it myself with a used ko3s which lasted about 6 weeks i then removed that turbo and took it to a turbo specialist and on inspection of the old turbo the guy said it appeared to be oil starvation that had caused it to fail and was advised to replace the oil feed pipes too so i replaced that turbo with a brand new one as well as the oil feed pipes and its been ok since
hopefully yours won't be anything as serious as mine and that if it is that your warranty will cover it for you

 

[The MoffMeister]

If your car is standard mate i wouldn't expect it to pull quickly past 130. Sounds around right to me!

no honestly mate my car pulled nice and smoth and quite all the way up to 140 no noise no nothing, want to get it sorted but my dealer are an ignorant bunch and took five days to do a bloody water pump cos they had the wrong bolts!!

 

[YerMother]

I still have this noise and it seems to be getting worse! Also it only does it when the engine is hot! So i was thinking could it be the gasket leaking between the manifold and turbo or manifold and cylinder head? As it happens around where peak power is, therefore max gas flow, increasing back pressure at the turbine! So could this be my problem maybe! As i said there seems to be no performance decrease so maybe this small amount of exhaust gases escaping through the gasket could be making this noise??

 

[slapbladder]

turbo is over spinning

Hi Chaps,
This noise is the turbo over spinning and eating the bearing. These turbos only use the old style technology bronze bearing which will be eaten if the turbo goes out of balance due to over revving. I killed a KO3 sport in the same way, i think your turbo's are the same or KO4. Take the inlet hose off the turbo and see how much play is in the shaft of the turbo. You will have a tiny bit of play due to no oil pressure which these bearing rely on. Anymore than 1-1.5mm and the bearing has had it, also check the inlet "snail" for marking from the impeller blades.
Good luck
J

 

[Jonzy]

^^^ what im suffering at the moment and has all the hallmarks of the original post

 

[Pagnobito]

Its either harmonic distortion from air flow, most noticeable at high gear low revs, or its broken. Does that help?

 

[The MoffMeister]

well tbh guys mine seems to have gone now, aint a clue why put it all started with revo trial about a month or so after it seems to have stopped!!

 

[cordobabrendy]

This is now happening to me, ive found a fair amount of oil in the vertical pipe exiting the turbo (the silenced bit) I suppose i should have checked for play on the inlet side too as i had it up on jacks this morning.

 

[YerMother]

The culpret of my problem was a blocked CAT causing back pressure and was gases blowing through a slighlty loose downpipe! I fitted a CAT bypass pipe and tightened the DP and it's gone and went like stink then ! But then two weeks after that the turbo blew up!