Quote:
Originally Posted by Gofasterdammit
When was the truck apart last and who did it? That is a foreign object, it's real easy to drop something down the intake ports on the cylinder heads. My best guess is whoever had the intake manifold off (or EGR valve, ect) dropped a bolt down there. If the object finds the right spot it can get stuck in the intake manifold for a while, work it's way to the intake valves where it gets worn down until it's small enough to fit past the valves and into the cylinder. Ford is denying warranty coverage because a Ford part did not fail. You said the dealer fired the last tech for incompetence, well there you go. It's the dealer's responsibility (or whoever had it apart last) to fix it.
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Hi GFD, thanks for the theory, and the same dealer tech did the work on the first 3 times. We don't KNOW what caused the pictured damage because they (Ford) won't pay to take anything else apart to find out where the object came from or went to. If it was just a random bolt dropped down by mistake (and how many times have you worked on a something like a 4bbl carb with the air cleaner off and ...ooooooooops! ) then it might be justified to question where it came from. But they won't even look to find out what's missing!
I haven't TOUCHED this motor, for just this reason. I don't screw with anything under warranty. It's the fastest way to VOID a warranty. I just wish I could find out what that piston crown impression might be..
