[C320-list] Vibration at 1000 RPMs and Perkins Injectors?

[Dave Hupe]

 If you pull the exhaust elbow, as Jeff mentions, the short wet exhaust hose to the muffler likely will be rigid and need to be cut out and replaced.  Jeff and I both suggest replacing it with the hump hose from Catalina direct Exhaust Hump Hose 2" I.D. x 6" (catalinadirect.com) and the 2 inch fiberglass splice Exhaust Hose Fiberglass Splice for 2" Hose (catalinadirect.com). You also will need a short piece of regular wet exhaust hose and lots of clamps to splice enough hose length together between the exhaust elbow and muffler (even though the total length is I think less than 1 foot total).  Using the hump hose is good to reduce vibration on the inlet fiberglass flange of the muffler. 
Dave Hupe
1994 C320 (#32) with Perkins M30
Holland, MI