so ! Doctor's verdict after operation heart open! Already it was necessary to take out the engine ... and the first time it had not been of all rest to put it in.
I started by removing the cylinder head, side valves, no worries, piston side, we see that the second piston came to strike the valve because this one remained open. On the picture we see not too much but in truth it is obvious:
easier without the cylinder head :
And here is the guilty !!!!!! The screw that clamps the gear on the camshaft is loose! (Gok ok ... the guilty is me), shifting off the distri and PAF ! the rod of tippers as well as the pusher. At first glance the camshaft il safe !
I managed to pull out the pusher which in fact was not so stuck. In the end I did not need to pull out the engine but it's much simpler to work on it outside.
Next step I will continue the bodywork while waiting to find a push rod and a rocker rod