Ha! Yeah, this last engine I had in there was a skull crusher. Fixing the problem is just nuts and bolts but actually finding out what the problem is can be the real challenge. I know now I have bad piston ring in the old engine, but I don't know what else. I am interested to take it apart in the fall once it cools off. I've been driving around all morning! I love it! Good luck on your son's truck and thanks!