FINALLY !!!!!
i found what it was.................
it was an air leak !!! when i re fitted the intake manifold, a sticked the vapoured oil return hook between the joint and the manifold.... so nothing was sealed......
SO !! i'va put back the hook in is right place, IN FRONT OF THE MANIFOLD, and everithing is fine !!!!!
thanks a lot to everybody !
now the trick is to get this at gearbox shift...... lol
see ya.