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11-25-2014, 12:54 PM | #1 |
Join Date: Sep 2012
Posts: 27
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I also agree with the timing theory. If the timing is off it can mimic some of the fuel ratio theories and if it is really bad you can slam the valve and piston together (I think but don't know for sure that these are interference motors).
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11-26-2014, 08:47 PM | #2 |
Join Date: Apr 2012
Posts: 1
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It looks to me like a classic case of metal mice infestation, the bite marks are plain to see on the head!
Jokes aside beside the previous ideas a too tight valve that runs hot due to not being able to get rid of it's heat to the seat will weaken the valve and possibly cause it to break as this one did. |
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