OK here is a wild one for the experts, had a bent valve and top end fixed with new keepers
and alike. When puttng it all back to gether we tightened the valve cover and she will not start, turns over
and over but will not start. Unplugged it will run in limp mode (barely) but not good.
So just by trial and eror we adjust the valve cover (lossening it a bit) and she fires up. I then smell exhaust from the PCV valve and its painfully smelly. Add a new Valve cover gasket and the exhaust smell is gone but it now will randomly not start, to get it to start I will have appply pressure on the back side of the valve cover from passenger side to drivers direction, it then starts...... does anyone have ANY idea what could be the cause?

Thanks again

Lee

 

Cam timing.