Any body has an idea of what exactly happened? The engine is from a crashed
r22 and has 700 hours since new. All gages oil pressure temperature cilender
head are ok .All comments welcome

Claude,

One of the recurring inspection on your engine is the valve guide to
valve stem clearance. The rocker cover is removed and the valve stem
is moved back and forth to measure the movement. There is a go, no-go
limit that I can't think of off the top of my head. Excessive
clearance can allow oil to leak into the combustion chamber. One
associated issue is if it builds up with deposits from burnt oil it
can cause the valve to stick. This is bad! I would suggest getting
the AD's and service bulletins for the R22 and looking for the valve
guide to valve stem clearance test to start with. I can't remember if
it was SB or AD. One other slim possibility is a crankcase breather
problem causing the crankcase to build pressure, but this is visible
by other oil leaks normally. The bottom line, get it checked out.

Regards,

Eric D