Withdrawal
Drain coolant, see section "Maintenance work".
Remove V-ribbed belt.
Remove radiator.
Loosen the poly V-belt pulley bolts. At the same time, compress the belt to avoid turning the pulley. Remove poly V-belt pulley from hub.
Remove 4 coolant pump mounting bolts. For a 6-cylinder 6-gas engine, nuts must be loosened instead of the bolts shown.
Screw 2 M6 bolts into the threaded holes -arrows- to evenly press the pump housing away from the motor. Make sure that the pump is not twisted. The figure shows the pump of a 6-cylinder engine. In a diesel engine, the threaded holes are located in a vertical plane opposite each other, see arrows in figure W1841.
Installation
Remove the removable bolts, replace the coolant pump O-ring and lubricate it with standard silicone grease or petroleum jelly.
Insert the pump with a new seal and tighten the fastener evenly. The tightening torque of the bolts depends on the thread diameter: M6 - 10 Nm; M8 - 20 Nm.
Screw in the 4 bolts securing the belt pulley and tighten them to a torque of 10 Nm.
Install and tighten poly V-belt.
Install heatsink with fan.
Drink coolant and bleed air from the cooling system, see section "Maintenance work".
Warm up the engine and check the tightness of the hose connection and the coolant pump.