Re: [Expensive engine noises :^(]

[JACranwell@cs.com]

It's a long shot, but another potential cause, given the engine vital signs 
are good could be the starter ring coming away from the flywheel. I've had 
this happen, and the din is frightful. On the plus side, if this is the 
cause, it can be persuaded back into position with hammer, provided it has 
not split, with only the removal of the splash plate needed. 

Good luck,

Julian - SIII