Hello all,
Got my 12HT installed, and fixed an exhaust leak on the Manifold at the #1 cylinder. Everything pre-turbo is no really nice and tight as far as I can see. However, I am having a bit of noise from the turbo, not all the time, but the conditions in which it happens are easily reproduced.
When I drive around with the engine cold, I get a scraping noise when the boost goes over 4PSI. Once on the highway and the system is heated up to above 450° F, the noise goes away entirely. If I get off the highway and drive around and let the engine cool to below 250° F the noise starts to return. It seems like about 350° - 400° is the point where the change takes place.
It seems clear to me that something is expanding when hot and clearances are changing. I first question would be is it the turbocharger failing?
Does anyone have any ideas? I don't know what a failing turbocharger sounds like.
Cheers!
Michael
Got my 12HT installed, and fixed an exhaust leak on the Manifold at the #1 cylinder. Everything pre-turbo is no really nice and tight as far as I can see. However, I am having a bit of noise from the turbo, not all the time, but the conditions in which it happens are easily reproduced.
When I drive around with the engine cold, I get a scraping noise when the boost goes over 4PSI. Once on the highway and the system is heated up to above 450° F, the noise goes away entirely. If I get off the highway and drive around and let the engine cool to below 250° F the noise starts to return. It seems like about 350° - 400° is the point where the change takes place.
It seems clear to me that something is expanding when hot and clearances are changing. I first question would be is it the turbocharger failing?
Does anyone have any ideas? I don't know what a failing turbocharger sounds like.
Cheers!
Michael