|
if the valves are over tight and not closing you'd have compression loss and combustion leaking past the intake...Also the valves need to make enough contact with the valve seats to transfer heat into the head...if the valves cant transfer heat they can burn up.
A white plug suggests an overly lean air/fuel ratio. So you might want to look at re jetting the carburetor...unless its EFI...which is beyond my tinkering capability.
|