Almost every cold morning (sub 30's) after I start my car and begin to drive off I hear this horrible moan coming from the engine compartment. So one morning I got out of the car and revved the engine by pulling on the accelerator cable (I guess that's what it's called) and I noticed that the sound is coming from underneath the timing belt cover. What could be causing this noise only in cold weather? It really sounds like a bearing has gone south, but once you drive for about 1/2 mile it stops and never comes back again unless the car has been sitting outside in really cold weather. 355 Volvo has already replaced the idler pulley because it was making a high pitch whine sound (it made the moan sound before and after they replaced the idler pulley). I originally thought the moan was the emergency brake sticking in the morning, because it was so loud and it would go away after a little bit of driving. Any thoughts?

Also update on the sludge in oil. I just got off the phone with 355 Volvo and they said there was absolutely nothing wrong and that the tech really didn't find any sludge. Oh, boy some one needs some glasses. So I have to go over there and show them where it is. I guess it really doesn't matter what they say anyway, I'm still sending the oil away to be tested. I don't trust any mechanic who still can't find and fix a suspension clunk even after the forth visit AND I've replicated the sound with the tech in the car.

Thanks in advance

Scott

PS – 4000 miles left on VIP, hopefully everything wrong will get fixed!