PeachParts Mercedes-Benz Forum - View Single Post

lrg · #8 01-17-2003, 01:46 PM

I don't believe the pump lubricant you are talking about is black and floats around like that in the coolant. As I think about this though I'm not sure my first obversation about a bad head gasket is necessarily right either. I think psfred is right, if you have no pressure in the coolant system after it cools then you probably don't have a leak. More likely, at one time some oil somehow got in the system and has never come out. When you drain it, since the oil stays on the top of the coolant, it will stay behind with the little bit of coolant that you never quite get out. Flushing the system just moves it around so it takes a while before the oil droplets return to the expansion tank. I'd try sucking them out from the expansion tank 2 or 3 times ands see if they continue to come back. It could be that you'll gradually remove them and see fewer each time. If so I doubt you have a head and/or gasket problem. Keep a careful eye out for coolant in your oil for a while anyway, just to be on the safe side. Good luck.