can the exhaust housing get tweaked by the dp?

[TType85]

http://turbobuick.com/forums/threads/odd-noise-when-i-kill-the-motor.376605/

Strange sound. I can feel the vibration in the turbo when I kill the motor. It goes away when I pull the dp.

Went out to the car tonight. Makes the sound cold. hit the starter running and it grinds (so it is disengaging). Disconnected the downpipe (it doesn't line up again) and the noise is gone. It is the turbo. Looking at the exhaust housing it looks like the blade may be making contact (little shiny bits in the black soot. the blade looks good though and there is almost no play... could the down-pipe be tweaking the exhaust housing and when the engine turns off the bearings unload (no oil pressure) and it hits?

 

[TType85]

I don't think it's the exhaust wheel hitting anymore ....

 

[Chuck Leeper]

DP doesn't "line up"?? Are you having to force it into place?

 

[TType85]

DP doesn't "line up"?? Are you having to force it into place?

It was a few mm off of being parallel so it was forced in to place. I am going to pull it off the cat tonight and attach it to the turbo before I put the cat on.

 

[sscamino]

Loosen the turbo bracket bolts to the block and brace to the turbo its self,you should be able to get the DP to bolt up. Snug them ,then turbo bracket to motor then braket to turbo.