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You can hear the blown gaskets. It makes a loud ticking sound where the exhaust pulses are escaping at the flange. The biggest sign is a heavy amount of soot in the engine comapartment. Exhaust escaping around the gaskets will coat everything in black!

Also, Cummins specs 35 ft-lb. on the manifold bolts. They don't need to be gorilla tight! Tighten from the center two cylinders outwards progressively in a box pattern. Use plenty of anti-seize on the threads, and they shouldn't give you too much trouble in the future.

Hey everyone. Been a while since I have posted. I wanted to share this with anyone having similar problems. Long post with information. Due to level of grease and contamination, unfortunately no pictures of the process. Picture of the truck is all I have for now (4th of July). I have a...