ORIGINAL: William Robison
Flyer:
Most Enya engines have the cams made in a manner such that the inlet and exhaust cams can not be switched side to side. But not all are made that way.
If you have a valve strike condition, and you are SURE the timing is correct, you may have switched the cams. Otherwise the inlet cam has to be out of time – properly assembled and adjusted, the valves will not strike the piston, even without a head gasket.
Bill.
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I had an Enya 80-4C that could not run an OS Type F plug without an extra plug gasket in place. The piston would strike the glow plug tip without the extra gasket. Could this be the problem?