Water Pump: Service and Repair

11 51 000 - Removing and installing complete water pump (M52/S52/M52TU/M54/M56)

Remove alternator drive belt Replacing Alternator Drive Belt (M52/S52/M52TU/M54/M56).





Note:
M52 / S52
Water drain plug is located on exhaust side between cylinders 4 and 5 in engine block (illustration).
M52TU / M54 / M56
Water drain plug is located on exhaust side on cylinder 2 in engine block.





Drain and dispose of coolant.

Installation:
Replace seal.
Tightening torque 11 11 5AZ 11 11 Engine Block.
Vent cooling system and check for leaks.





Release belt pulley.





Release water pump.





Tighten two screws (M 6) into thread of water pump and water pump out of timing case.





Installation:
Replace O-ring and coat with coolant as anti-friction agent.