Help with STI Turbo whine!!???!!?? - TriStateTuners.com :: Home of Tristate Auto Enthusiast

4G63FTW · 11-13-2009, 11:18 AM

A friend of mine just stopped by my house 2 have me listen 2 his 05 STI... he said after messin around with a talon on the highway last night his car has been whining like a supercharger..... but only under boost....so i go 4 a ride with him and there is no noise @ idle or part throttle driving around... but as soon as it build over 6psi it whines really loud (in cabin) and spools up to 17psi fine, no lack of power or loss of vacuum @ idle... and its not burning oil... any1 have any input?? my next step would be to check bearing free play in his turbo.

Subie_sleeper · 11-13-2009, 11:31 AM

Quote:

Originally Posted by 4G63FTW

A friend of mine just stopped by my house 2 have me listen 2 his 05 STI... he said after messin around with a talon on the highway last night his car has been whining like a supercharger..... but only under boost....so i go 4 a ride with him and there is no noise @ idle or part throttle driving around... but as soon as it build over 6psi it whines really loud (in cabin) and spools up to 17psi fine, no lack of power or loss of vacuum @ idle... and its not burning oil... any1 have any input?? my next step would be to check bearing free play in his turbo.

Take it to Area1320. Or call them if it's too far.

06njsti · 11-13-2009, 01:09 PM

well how many miles are on the turbo and how many psi is he running?

97TurboDSM · 11-13-2009, 01:28 PM

sounds like the turbo is getting ready to go.

TalonTsi97 · 11-13-2009, 01:31 PM

Quote:

Originally Posted by 97TurboDSM

sounds like the turbo is getting ready to go.

I agree ^
Usually they squeal when its over spinning so best to find out whats going on before it blows.

97TurboDSM · 11-13-2009, 02:44 PM

or run it till it blows and make sure you have something ready to drop in. personally i would just swap it now.

deb38 · 11-13-2009, 03:13 PM

My guess is you have a boost leak. If not, then you probably have a bad turbo. But a bad turbo will most likely result in some form of burning oil.

Burning oil = smoke show.

Pressure test.

rodknock02 · 11-13-2009, 03:19 PM

More than likly its a blown up pipe or turbo inlet gasket. IF the car is holding boost it most likly doesnt have a boost leak .I have had the same problem with on of my old cars b4.

Drake

tooslow1 · 12-02-2009, 09:40 PM

check compressor blade of the turbo

Vypurr · 12-02-2009, 10:25 PM

Quote:

Originally Posted by Drake@Area1320

More than likly its a blown up pipe or turbo inlet gasket. IF the car is holding boost it most likly doesnt have a boost leak .I have had the same problem with on of my old cars b4.

Drake

Agreed 100x! I had that exact problem. Does your buddy have a FMIC by any chance? Check all of the pipes and then check the up-pipe!

superskaterxes · 12-03-2009, 10:18 AM

neg your turbo is dunzo. the shaft is bent. i had the same problem where i heard the SC whine but still held peak boost and i sent my turbo back to be looked at and sure enough the shaft was bent.

RyanG · 12-03-2009, 01:58 PM

Its most likely a boost leak of some form.

Bearing freeplay? The VF39 is a journal bearing turbo and WILL HAVE PLAY no matter what. As long as the fins are not contacting the compressor housing or exhaust housing then the turbo is fine. People need to stop thinking all turbos should not have freeplay. Check the exhaust wheel for signs of oil leakage.

Boost leaks sound like a zazoo when building pressure, if he is still on a TMIC I would bet the bypass valve gasket is leaking ;)

Honest_Bob · 12-04-2009, 06:40 AM

Quote:

Originally Posted by AREA1320

if he is still on a TMIC I would bet the bypass valve gasket is leaking ;)

this

been there done that.

C'DALERIDER · 12-04-2009, 02:30 PM

total agree with bov gasket issue, only under boost issue solidifies dx. it sounds pretty nasty, like a loud whin/whistle...and realy willl not be large enough to comprimise boost pressure/performance. It could be a leak someplace else also. check vac lines etc etc, zip tie em all. i doubt it's the snail.

Supraru · 12-06-2009, 10:14 PM

Quote:

Originally Posted by AREA1320

Its most likely a boost leak of some form.

Bearing freeplay? The VF39 is a journal bearing turbo and WILL HAVE PLAY no matter what. As long as the fins are not contacting the compressor housing or exhaust housing then the turbo is fine. People need to stop thinking all turbos should not have freeplay. Check the exhaust wheel for signs of oil leakage.

Boost leaks sound like a zazoo when building pressure, if he is still on a TMIC I would bet the bypass valve gasket is leaking ;)

I'd also recommend this. One of my friends at work diagnosed a blown turbo but ended up being the bypass valve gasket. In his defense it sounds identical to a bad turbo. It was an 02' completely stock unmolested. That would be an easy cheap thing to try first.

kcnizm0 · 12-31-2009, 03:17 PM

did you find out what it was??

atenzany62 · 01-02-2010, 01:10 AM

Quote:

Originally Posted by Drake@Area1320

More than likly its a blown up pipe or turbo inlet gasket. IF the car is holding boost it most likly doesnt have a boost leak .I have had the same problem with on of my old cars b4.

Drake

i dont think turbo subarus have gaskets for the turbo inlet. are you speaking of the plastic pipe that connects the turbo and the intake?

RyanG · 01-02-2010, 10:36 AM

he is talking about the turbo exhaust inlet.

techie · 01-02-2010, 11:34 AM

Quote:

Originally Posted by atenzany62

i dont think turbo subarus have gaskets for the turbo inlet. are you speaking of the plastic pipe that connects the turbo and the intake?

You're correct, the inlet is either plastic or silicone and just a clamp that goes over the turbo intake.

hempele28 · 01-03-2010, 12:13 AM

i agree with a leak off a possible blown gasket. i had a similar whine on my evo when i blew a gasket out between the turbo and j-pipe. drove fine and boosted fully but whined like hell. the turbo will over spin to compensate for the leak. fix it because it is a quick way to blow a turbo if you are over spinning it.

11-13-2009, 11:18 AM	#1
4G63FTW Tri-State Training Wheels Join Date: Aug 2009 Location: Reading, PA Member #14436 My Ride: 98 Mitsubishi GSX, AE86 coupe iTrader: (0)	Help with STI Turbo whine!!???!!?? A friend of mine just stopped by my house 2 have me listen 2 his 05 STI... he said after messin around with a talon on the highway last night his car has been whining like a supercharger..... but only under boost....so i go 4 a ride with him and there is no noise @ idle or part throttle driving around... but as soon as it build over 6psi it whines really loud (in cabin) and spools up to 17psi fine, no lack of power or loss of vacuum @ idle... and its not burning oil... any1 have any input?? my next step would be to check bearing free play in his turbo.

11-13-2009, 01:09 PM	#3
06njsti Tri-State Addict Join Date: Jul 2007 Member #5392 My Ride: 06 LSB STI awdm'd iTrader: (1)	well how many miles are on the turbo and how many psi is he running? __________________ 94 Toyota Tercel...85hp-Gas Sipper!!- 06 Yukon Denali 6.0l on 4's!-Daily Grind- 97 Jeep Grand Cherokee LTD 5.2l -Sold- 06 WRX STi -Weekend Street Monster- 02 Jeep Grand Cherokee LTD 4.7l -Sold-

11-13-2009, 01:28 PM	#4
97TurboDSM TST Ruined My Life! Join Date: Sep 2005 Member #849 My Ride: '03 IY 20th GTI iTrader: (3)	sounds like the turbo is getting ready to go. __________________ FOR SALE! Canon 5D\|17-40L\|85mm f/1.8\|Sigmalux\|580ex

11-13-2009, 02:44 PM	#6
97TurboDSM TST Ruined My Life! Join Date: Sep 2005 Member #849 My Ride: '03 IY 20th GTI iTrader: (3)	or run it till it blows and make sure you have something ready to drop in. personally i would just swap it now. __________________ FOR SALE! Canon 5D\|17-40L\|85mm f/1.8\|Sigmalux\|580ex

11-13-2009, 03:13 PM	#7
deb38 Tri-State Addict Join Date: Jun 2007 Location: Manayunk PA Member #5266 My Ride: 2001 Audi S4 iTrader: (0)	My guess is you have a boost leak. If not, then you probably have a bad turbo. But a bad turbo will most likely result in some form of burning oil. Burning oil = smoke show. Pressure test. __________________ Older Setup - Custom Tuned Stage 3 S4 Old Setup - Built 2.7 Single S366 Turbo New Setup - RS6's, Meth, Dumps. Sitting on Jack Stands To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

11-13-2009, 03:19 PM	#8
rodknock02 Tri-State Aficionado Join Date: Aug 2007 Location: EASTON Member #5523 My Ride: R.I.P 02 wrx wrb 20g'd ,6mt 376hp/402tq iTrader: (1)	More than likly its a blown up pipe or turbo inlet gasket. IF the car is holding boost it most likly doesnt have a boost leak .I have had the same problem with on of my old cars b4. Drake __________________ R.I.P To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. next one will be 6700 rpms launch baha!

12-02-2009, 09:40 PM	#9
tooslow1 Tri-State Addict Join Date: Feb 2008 Member #6964 My Ride: 1998 Eclipse GSX iTrader: (4)	check compressor blade of the turbo __________________ 1984 ae86 corolla - gettin dirty project 1996 BMW 740il - BALLER STATUS

12-03-2009, 10:18 AM	#11
superskaterxes Tri-State Addict Join Date: Jan 2009 Location: DC Metro Member #10675 My Ride: 2006 Mazdaspeed 6 iTrader: (0)	neg your turbo is dunzo. the shaft is bent. i had the same problem where i heard the SC whine but still held peak boost and i sent my turbo back to be looked at and sure enough the shaft was bent. __________________ GT3076R BITCHES ~ TXS BOV ~ 3" MAF SRI ~ AP PROtune'd ~ MBC ~ Custom FMIC w/Treadstone TR8 Core ~ CPE DP ~ DNP Mani w/Tial 38mm MV-S EWG VTA'd~ CPE BT TIP ~ TWM SS ~ CPE RMM ~ TTFMM ~ CPE RDM ~ BC CO's slammed ~ SPC BJ's ~ EBC Red's ~ Stoptech's ~ Technafit SS Lines ~ Autometer Boost & STRI EGT ~ 20% Tint ~ LED Tails ~ Denso ITV-24's ~ CPE Dual CBE ~ Whiteline RSB ~ PnP'd IM ~ CDFP Internals ~ labonte meth kit ~ VC tapped OCC

12-03-2009, 01:58 PM	#12
RyanG Tri-State Post Whore Join Date: Jan 2005 Location: Easton, PA Member #63 iTrader: (1)	Its most likely a boost leak of some form. Bearing freeplay? The VF39 is a journal bearing turbo and WILL HAVE PLAY no matter what. As long as the fins are not contacting the compressor housing or exhaust housing then the turbo is fine. People need to stop thinking all turbos should not have freeplay. Check the exhaust wheel for signs of oil leakage. Boost leaks sound like a zazoo when building pressure, if he is still on a TMIC I would bet the bypass valve gasket is leaking ;) __________________ I am Area1320 To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

12-04-2009, 02:30 PM	#14
C'DALERIDER Tri-State Addict Join Date: Nov 2005 Location: PHOENIXVILLE Member #1064 My Ride: '04WRX,'06STI;WRBX2,850awhp iTrader: (0)	total agree with bov gasket issue, only under boost issue solidifies dx. it sounds pretty nasty, like a loud whin/whistle...and realy willl not be large enough to comprimise boost pressure/performance. It could be a leak someplace else also. check vac lines etc etc, zip tie em all. i doubt it's the snail. __________________ The wheel in front of me twitches and pulses with enormous energy as it tries desperately to pull away from my gasping breaths. My legs ache, the pain beginning deep, unbelievably deep, slowly creeping up through the layers of my consciousness, finally reaching the threshold where my struggle to ignore it is overcome and it comes gushing out in great spasms.

12-31-2009, 03:17 PM	#16
kcnizm0 Tri-State Addict Join Date: Sep 2008 Location: center vally, pa Member #8741 My Ride: 13 Subaru wrx, 10 Infiniti G37x iTrader: (2)	did you find out what it was??

01-02-2010, 10:36 AM	#18
RyanG Tri-State Post Whore Join Date: Jan 2005 Location: Easton, PA Member #63 iTrader: (1)	he is talking about the turbo exhaust inlet. __________________ I am Area1320 To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

01-03-2010, 12:13 AM	#20
hempele28 Tri-State Aficionado Join Date: Dec 2007 Location: easton Member #6456 My Ride: 2003 evo 8 iTrader: (0)	i agree with a leak off a possible blown gasket. i had a similar whine on my evo when i blew a gasket out between the turbo and j-pipe. drove fine and boosted fully but whined like hell. the turbo will over spin to compensate for the leak. fix it because it is a quick way to blow a turbo if you are over spinning it. __________________ some bolt on's and a stock appearing turbo To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures. To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

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