Noise from turbo at idle

[Serkan]

Need help diagnosing a noise. It is a 2004 wrx with sti mods (intercooler, injectors, exhaust ...)

I swapped a leaking vf30 with a used vf34. The turbo did not have shaft play or sign of failure.

I installed the turbo. It doesn't smoke, pulls nice but I get this weird noise. I am not sure if it is coming from turbo itself or an uppipe leak.

I can hear the noise in the cabin when accelerating from stop (or accelerating after a turn) but can't hear anything in high boost when I step on the pedal.

The noise is not there if I keep the wastegate open manually and rev it while idling.

And it is not transmission, a/c, ps pump, alternator related.

https://www.youtube.com/watch?v=bKJM7gO4lx8

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[Brother EddieJ.]

Ball bearing turbo. I'm guessing that's the noise you hear. Can't pull up video gov computer.

[Serkan]

Originally Posted by Brother EddieJ.

Ball bearing turbo. I'm guessing that's the noise you hear. Can't pull up video gov computer.

Yea, seems like it is common for vf34 turbos to make that whine. I searched "vf34 whine" on google and lots of threads showed up.

It actually sounds cool, as long as there is nothing wrong with it.

[zoukieee]

Did this ever get rectified?
I'm experiencing exactly the same on a VF42

[magicmarker18]

sam...did you find out?

[Samurai Jack]

I never heard that sound when I had a VF34 but then I never tried or had a need to look for it either in 100,000 miles.

[subaru_gc8]

my vf23 used to make the same sound. its the ball bearing turbo noise

Originally Posted by Samurai Jack

I never heard that sound when I had a VF34 but then I never tried or had a need to look for it either in 100,000 miles.

may be you just never noticed it...or your 34 wasnt really a 34

[Samurai Jack]

Originally Posted by subaru_gc8

may be you just never noticed it...or your 34 wasnt really a 34

Yet again you are making statements about things you know absolutely nothing about.

[subaru_gc8]

Originally Posted by Samurai Jack

Yet again you are making statements about things you know absolutely nothing about.

maybe but the 34 is a ball bearing tubor with a RHF5HB chra.... it should make the ball bearing noise.... I could probably say the same about you. or do you think you're the only turbo out there that doesnt make that noise?

[Samurai Jack]

I never said that my VF34 was the only one that doesn't make that noise. I said

Originally Posted by Samurai Jack

I never heard that sound when I had a VF34 but then I never tried or had a need to look for it either in 100,000 miles.

Pretty clear to me what I did and didn't say.

Which also begs the question, " Why is the OP, or anyone else for that matter, revving the motor without putting a load on the engine like that just to hear their turbo whine? "

One can find all sorts of " suspicious noises " in their car, all they have to do is go looking for them and then think they have an issue which never existed.
We see lots of " What is this noise " posts when it is just a new owner panicking over something they think they hear / heard which turns out to be absolutely nothing.

[Serkan]

Originally Posted by Samurai Jack

Which also begs the question, " Why is the OP, or anyone else for that matter, revving the motor without putting a load on the engine like that just to hear their turbo whine? "