DaleJ
I checked to site of the old leak, felt like I could feel a leak. So I took the insulation off the pipe from the manifold to the turbo and remounted it. Now I could feel a big leak at the junction of the manifold and pipe to turbo. I turns out that I think I have a major leak in the exhaust manifold right side of bus rear cylinder.

Replacing the manifold gaskets, is this a project that I should tackle or bring to the DD or like diesel folks?

GregM