zero compression yes Zero lol !

nm9stheham said

I've had valves stick in small aircraft engines for a second or 2 and then go on running just fine forever. (Dropping 1 of 4 cylinders in the air WILL get your attention LOL!) So, crud in the guides can do this. Hope it stays fixed. I 'd put some Rislone or MMO in the oil for a few hundred miles to clean things out.

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I'm running synthetic which makes it harder to find an additive product but I am looking , I am now more that ever convinced it was the pushrod not seated in the lifter or the lash too tight not the valve sticking but either way we'll see if it stays together eh lol !
PS I bet the pucker factor is off the chart when that happens mid air yikes !