Quote:
Originally Posted by COLVERT
-If an engine becomes---Oil Starved---the first thing it will do is seize up.--  |
The top of the KV6 can become oil starved leading to tappet noise, tappet wear and worn camshafts. I had this. Cause yet to be determined - possibly combination of very very slightly damaged bottom end bearing and aging oil pump.
To the OP - I have read of a couple of cases of one of the pulleys on the secondary belts failing. You will see that one is an ordinary sprocket, the other incorporates a vibration damper. Of the two instances I have read, the rubber part holding the inner and outer parts of the damper pulley had failed. I don't know if any visible signs of failure must be there before any symptoms arise. But it is a known although rare problem. Possibly it is starting to fail (or could be something else entirely).