weird sound with video!!

[peste noire]

so after driving yesterday i noticed that i was getting a wierd sound and suddenly it got louder.

today i tried to check what is, so i open the hood and rev it but i can hardly hear it when i put load on it and hit boost , there it is. lifted the car to see if i can see anithing tranny looked to have a little oil under but my valve covers do leak alittle so i think it might of just gone down to the tranny. maybe the turbo? maybe the boost controller affecting the wastegate??


heres video 1 from the top http://www.youtube.com/watch?v=r8gCdGJL_d4

and heres video number 2 from the shifter http://www.youtube.com/watch?v=_YuCP--tvtw

any help is appreciated.

 

[bioskyline]

holy shit is all i gotta say......that is nasty. how is the turbo? check for shaftplay, almost sounds like its toast and rubbing on the housing.

 

[peste noire]

well i recently got the turbo from another shell i had and it had play, not bad but it had it and since then i hap put about 500 miles since then so idk if can get messed up that quick...

yoy think its turbo related (hopefully)and not motor internals??

 

[jonahs_supra]

I would say the turbo
Inspect and see what kind of play you got

Does it do it when free revving?

 

[peste noire]

you mean when im not actually driving it, just giving it gas? (not in load?) \

it doesnt it do it in free revving,only while driving.

 

[Poodles]

Check for leaks as well, had that sounds before when the turbo was loose on the manifold.

 

[OfnaRcR4]

Kind of sounds like an exhaust leak but a little "lumpier"?

 

[radiod]

Definitely something related to or around the turbo. As others have already said, check for leaks and excessive shaft play.

 

[peste noire]

so i checked the turbo for shaft play and it feels as the same i amount as it had when i put it on( light/medium play) also checked the turbo so see if it was loose but couldnt see anything. mainfold and turbo where on there tight.

you guys dont think this noise could be clutch related?? cause i reused arp bolts for the flywheel and stock bolts for the pressure plate with no lock tight( didnt know about this when i was putting tranny on) and clutch was used from but clutch disk and pp did not come from the same car(had too many mixed parts so i didnt know which ones they mated to.

 

[Greyscorpion]

it only makes the noise when you are making boost or under light load im thinking turbo as well. when you check the turbo you shouldnt be able to move the shaft much at all in and out and side to side. You have to remember that the turbo is spinning at very high rpms and needs very high tolerances it dont take much movement to cause damage.

 

[bioskyline]

if it was clutch related i would assume you would feel it everytime you pressed the pedal.

when you replaced the turbo, did you reuse the exaust housing gaskets? also you might want to check the bolts like poodles says that they are tight, now that its had a few heat cycles.

 

[peste noire]

so im ruling out the fact that it can be clutch related...

yea i did. i used the one i had but it was in good condition. i will try to lit the rear tires and have some one make the wheels turn(safely) so i can try to pin point where the noise is coming from.

 

[jonahs_supra]

only other thing i could think of is possibly the bov????
shot in the dark

 

[vpr131]

Did you ever find out what the problem was? I have the same sound right now and I'm not sure what is either...

 

[peste noire]

no not yet. havent driving it much but thinking it might be exhaust or boost leak cause after changing the turbo(moved several stuff) the noise came in at like 5 psi and so on,compared to before where it would do it as soon as i would hit 0 or 1 psi. goona do a boost leak later.

 

[supraguy@aol]

Can barely hear it over the whine if your diff, but it does sound like the turbo.

 

[vpr131]

I just found out why mine was making the same noise as yours. As poodles was saying, check the 4 bolts where the manifold connects to the turbo. the top 2 are easy to get to and are easy to see and reach, but the bottom two are not. Check those and see if they are tight. Even being just a little loose will cause that noise.