turbo wheels scraping against housing

[adam 32]

ive been listening around my engine bay intensely recently as theres a strange scraping sort of sound going on. the front end bearing of my gearbox is very worn so thats making a noise but there seems to be a scraping sound coming from near the turbo area.

its sounds like the wheels are scraping against the turbo housing. is this realistic? the turbo still spools up well and theres no loss in power... could this scraping noise not be the turbo? its driving me crazy!!

[adam 32]

anyone have any ideas??

[dojobi]

have you had your turbo high flowed?

[macka]

Thats a nice avatar Adam!

Do what i said before, take the outlet hose off the turbo compressor

Stick hand in and spin the wheel

also check forsideways and back and forth motion

Relax!

[raist60]

My GT30 makes that sound too. If its your factory turbo that doesnt sound right. But if youve had shit done to it dont sweat.

And macka i think you meant to say intake hose dunno how the f*&k you gonna spin the turbo from the outlet

[macka]

He has a T04E and its been on his car since he purchased it

[puckish]

Could be lots of other things as well. I your worried speak to Turbo Techincs on GE Highway.

They explained to me that what you described can happen, when I asked about my Soarer once.

[adam 32]

as macka said ive got a t04. i swear the scraping sound is coming from the turbo! but their appers to be no side effects, and when you stand over the engine bay and rev the engine it goes away... i really dont understand. macka mayeb you should swing by a have a look hehe:burnout:

[adam 32]

puckish: what did they tell you? was it bad??

[RS500]

have u leaned it out the turbo by running hi-boost and not having enough fuel?

if so, you have probably melted your turbine wheel and caused the turbo to go out of balance which might be causing the exhaust wheel to hit the housing.

check the shaft for any movement (in/out & left/right) from the compressor side, or get it checked out by a turbo specialist.

good luck.

[adam 32]

nah i havent leaned it out that much

im running 12-13psi with a bigger fuel pump, and AF's around the 10:1 mark.

i might get it checked by a specialist... i dont know if im being paranoid or not though, because sometimes i hear it and sometimes i dont. also the front end bearing of the gearbox is gone and thats making noise around the same area so im not sure...

if it was scraping against the housing would it

a) be loud

B) occur under all conditions?

[RS500]

if it's what i'm thinking, it will happen always and it would be pretty audible.

[adam 32]

yeh see sometimes i hear it and sometimes i dont.... its making me paranoid though! cos i dont want to spend $500 on tuning the engine if the turbo is suspect....

[DESTROY]

Has it always sounded like this or have you just recently noticed it?

Is this noise still there for about 30secs after you've switched your car off after a drive?

[adam 32]

well i (macka actually) pulled the intake pipe off and checked for any shaft movement in the turbo and all seems to be fine!

so false alarm.... must have been my paranoid ears hearing things!

thanks for all the responses guys

adam

[Guest Cob@lt60]

Hi dude,

My standard R32 turbo started doing the same/similar thing the other day.. It makes a squeeling/scraping noise only when the boost starts coming on (around .5 bar)

I'm taking mine to the mechanics on Wednesday 16th (if it lasts that long).. They said perhaps the exhaust wheel is unballanced or missing a "vein".

It's slowly getting worse i think.. *tear*

[Squizz]

Mine did that and spat the exhaust wheel straight out the back when the guy who bought it took it to the drags.