sounds like a marble is caught in the driver's side timing belt cover...when I put my fingers on the cover I can feel something getting knocked around. Happens usually when I start it and stops when the rpms get a little higher. no loss of power and everything else is normal. I tried taking the cover off (3 bolt screws) but the coolant overflow tank was in the way...does anybody know if the bottom of the coolant overflow tank is connected to the rad? Or do I just un-do the 2 bolts on it and yank it out? I did get the cover partly off and nothing fell out...and the belt looked fine.
any ideas?