Blown Turbo?

[Mike,]

So my turbo spools a normal noise untill around 4000 rpms and then it just makes this high pitch whining noise + spooling,
my boost gauge is not hooked up but i know i am still getting boost,
i still get regualr gas milage 350 - 500 kms a tank dependinghow i drive.
93 nissan silvia sr20det.

thanks guys.

[dnomyar]

had the same problem not too long ago. i had a boost leak by the turbo.

[ZakS13]

i actually just made a thread about this (should've search eh?)..dnomyar, was the leak on the outlet of the compressor on the turbo? searching said it could be the exhaust manifold to turbo gasket being blown out?

[dnomyar]

mine was on the compressor outlet

[ZakS13]

maybe thats where mine is as well..i pulled it off many times but never replaced the gasket. would a permatex gasket maker work or should i get something better? i just ask because i have some laying around..

btw, wouldn't it cause a boost leak symptoms like bucking/sputtering, or is it because the leaks are too small or something?

[Mike,]

my car doesnt really sputter at all,
is there any other sign of boost leak? and how expensive is it to get a new turbo gasket and fix my boost leak?

[ZakS13]

i believe the gaskets are like $15 or something like that? i used RTV silicone but can't say if it held up or not as i still have the whining. go to last post and watch video and confirm if it sounds like that.

turbo death whine...? - Supraforums.com (http://www.supraforums.com/forum/showthread.php?p=3298750)

[Mike,]

yeah thats kindof the noise,
ill go video tape the sound in a bit here.

[dondochaka]

I doubt the compressor wheel would've touched the housings, but just to check, take the inlet elbow off and see if there's any contact between the wheel and the comp. housing.

eliminate problems one by one.

[Mike,]

here is the first video of the whine.



YouTube - My Silvia Turbo whine 1

(http://www.youtube.com/watch?v=S4bABKvP2kU)

[Mike,]

and the second video

YouTube - My Silvia Turbo whine 2 (http://www.youtube.com/watch?v=XYFImycFH8c)

[ZakS13]

all my exhaust bolts are tight on the manifold, O2 housing, and downpipe..replaced the compressor outlet gasket, and there is minimal shaft play. maybe some sort of small leak in the IC piping somewhere?