Quote:
Originally Posted by war1ock
idk how it just pops out but it does. The threads arent messed up which puzzles me. I do t just pop it back in i meant i screw it back in.
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Try some Teflon tape or Loctite on the threads. As to why it's popping out, the crankcase pressure is too high. All the exhaust gases aren't leaving the cylinder, they build up and out pops the plug.
Adjust the valves, check exhaust for obstructions, make sure threads aren't damaged.
With the plug plugged, the head gasket is next. Or, it could blow a hole in the head.
My .02