CAN BAD SET TIMING CAUSE VALVES TO BREAK AND DESTROY HEAD AND PISTONS?

2002 Ford F-150

Tiny

adriangallardo

August, 16, 2012 AT 5:52 PM

Put in rebuilt heads on a 2002 ford f150 4.6 v8. I think the timing chain was put on wrong but not sure. Upon starting car ther was 2 loud knocks. The engine did not turn. Open the heads again and three of the four valves had completely broken with enough force to send 1 valve through a piston an d made a hole. Pistons were damaged and head beyond repair. What could have happened? Any advice would help. THank you

FOUND 314 RELATED QUESTIONS

1 Answer

Tiny

ASEMaster6371

August, 16, 2012 AT 6:18 PM

Absolutely. It is an interference engine.

When were the heads installed?

Roy

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