Quote:
Originally Posted by Jeron
Yes, TDC I meant engine temp.
Blockage is rare but would be plastic impeller bits or sludge. YM98 is after the bad plastic impeller era so its doubtful.
Something I didn't mention along the lines of the belt slippage is a bad water pump. Since the head is off go ahead and pull the pump and make sure the impeller and input flange are as one.
I thought this thread might help you but I doubt it:
94 525i need help
You should be checking the temperature of the bottom hose. The top (rad inlet) hose will get hot even if there is a a bad thermostat or circulation problem.
It's too late now but I don't see any reason why you needed to pull the head either time. |
Based on how the head looked (CLEAN), sludge is very doubtfull.
I replaced the water pump again with a steward HP water pump after the problem started, it didnt help.
The bottom hose was hot to the touch as well, i remember checking several times.
I appreciate your opinion, but i removed, flushed, inspected and replaced the entire cooling system several times during all this (before pulling the head). I didnt know what else to do. I read many older threads on bimmerforums that mimicked my problems or came very close and ended up being a head gasket or cracked head.