Has your oil pressure dropped a bit too? If so I'll bet its one of the little oil tubes. M119's are known to do that. Click on the link in the previous post.

__________________
"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles