What did you do to your Class A MH today???
This is always a fun thread to watch, so I thought I would start one here.
Forum Discussion
The good news: I think I finally tracked down the source of the squealing noise I had believed was a serpetine belt or fan bearing problem on my CAT C-7. I verified it wasn't the belt by removing it completely and the noise was still there.
The bad news: It sounds like the turbo and there seems to be excessive play in the turbine the blades. It took me 5 hours to remove it, but on the bright side I soaked all the rusty exhaust manifold bolts/nuts with PB Blaster (that stuff is great) and they all came out with breaking. I'm sure I will be in for sticker shock when I order a new turbo on Monday, but at least my labor rate is affordable. :)
Lou
05 Travel Supreme Envoy
Revision 1
More bad news: Now that I have the turbo out, the tolerances appear to be within spec. I'm going to let the CAT dealer check it out to be sure, but this means I spent a lot of time under the MOHO and still haven't located the source of the noise. Once again, on the bright side I did learn a bunch of stuff about the operation of the turbo.
I'm leaning towards a transmission problem now and found a few internet hits related to a failing diverter valve causing noise similar to a belt squealing. Anyone have any experience with this?
Thx,
Lou
The bad news: It sounds like the turbo and there seems to be excessive play in the turbine the blades. It took me 5 hours to remove it, but on the bright side I soaked all the rusty exhaust manifold bolts/nuts with PB Blaster (that stuff is great) and they all came out with breaking. I'm sure I will be in for sticker shock when I order a new turbo on Monday, but at least my labor rate is affordable. :)
Lou
05 Travel Supreme Envoy
Revision 1
More bad news: Now that I have the turbo out, the tolerances appear to be within spec. I'm going to let the CAT dealer check it out to be sure, but this means I spent a lot of time under the MOHO and still haven't located the source of the noise. Once again, on the bright side I did learn a bunch of stuff about the operation of the turbo.
I'm leaning towards a transmission problem now and found a few internet hits related to a failing diverter valve causing noise similar to a belt squealing. Anyone have any experience with this?
Thx,
Lou
