Water Pump: Service and Repair

Removing and installing complete water pump (M52 / S52 /M52TU/ M54 / M56)


Installation Note:
1. All screws, nuts, bolts and hose clamps removed during the repair must be replaced.
2. Retaining elements on chassis and suspension and steering parts must be replaced.

Remove drive belt for alternator, refer to Engine, Cooling and Exhaust - Engine - Drive Belts, Mounts, Brackets and Accessories - Drive Belt - Service and Repair - Procedures Service and Repair





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

Drain and dispose of coolant.

Installation Note:
Replace seal.
Tightening Torque, refer to Specifications - Mechanical. Specifications
Vent cooling system and check for leaks, refer to Engine, Cooling and Exhaust - Cooling System - Service and Repair - Procedures. Service and Repair




Release belt pulley.




Release water pump.




Tighten two screws (M6) into thread of water pump and water pump out of timing case.




Installation Note:
Replace the O-ring and coat it with coolant as a lubricant.