Ok, further investigation revealed that my tensioner was incorrect and allowing the slack to slam the cam a tiny bit after the crank stopped. BARF* But no damage! I took the tb cover off and loosened the three 13mm cam sprocket bolts, and the tensioner nut and reset the tensioner.
Works great now.. But isn't the tensioner pointer supposed to wobble or move while the belt is going round and round? Also when I let the tension off the belt.. its creeks and doesn't seem to be.. flexible. I can't get a torque wrench on it so I have been guessing at the tightness. Still.. When loosened hardly anything belt wise moves. I know its slight but.. its seems locked up! Its fixed for the moment. I don't know what else to do with it.
Oh.. Maybe this helps: When I tightened the 15mm center nut.. the pointer use to move a bit. Now it does not move. The pointer stays where the allen key set it at. And after the engine runs.. it gets tighter on its own! It was so tight that the pointer was all the way over to the right! what the heck?! Something is wrong here. Maybe I should pull it and investigate it further.
The Aliment tab is in its slot. That was the first thing I checked.
Any Ideas? Ill check the valve thing.. But I bet its the Tensioner/my own fault. I could put the old one back on and see. Use it until I can order a new one... but that's putting the cart before the horse.
I'll keep working at it until the wee hours. Burn some midnight oil. Fuel oil that is!
PS
Seatman: The valve is NOT closed when the engine is off. When I switch it off it makes a noise and opens and closes etc.. then stays open. Its always done that... I think.. is it supposed to stay closed!!!? How do I fix it? I don't have a VCDS.
Its not the root cause of the slamming violent engine stop. It was the tb tensioner. I just want to make sure the tensioner is functioning correctly. Should I also be concerned with the Valve too?