Exhaust Leak on a 400 Cummins
Can anyone tell me how to check for an exhaust leak on a diesel?? Have been hearing what sounds like an exhaust leak when driving with the window down on the highway. More noticeable when you have the...
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Look for black soot marks emanating form the manifold and onto the side of the head. Most likely in the rear third of the manifold. Also look for cracks on the "ears" that the mounting bolts go through.
