Water Pump: Service and Repair

Coolant pump, replacing

Special tools:
951 2957 Coolant Reservoir 951 2957 Coolant Reservoir
951 2953 Cover 951 2953 Cover

Note! The illustrations in this service information are used for different model years and/or models. Some variation may occur. However, the essential information in the illustrations is always correct.

Note! Raise the vehicle as described in Jacking points, body Service and Repair.

Removal

Preparatory work
Remove the expansion tank cap.
Raise the vehicle.

Removing protective plate





Note! There is a guide sleeve on the upper mounting for the plate. This must be lifted slightly so that the panel can be slid forward.

Remove the 6 screws.
Lift and slide the protective plate forward.
Remove the protective plate.

Draining coolant
Open the cock on the lower left edge of the radiator.
Drain the coolant into a clean receptacle.
Close the cock.

Installing the protective plate





Install:
- the protective plate
- the 6 screws; tighten.
Lower the vehicle.

Removing the coolant pump belt pulley




Undo the 4 screws of the coolant pump belt pulley.
Loosen the screws a few turns.

Removing the auxiliaries belt
Remove the auxiliaries belt. See Auxiliaries belt/belt tensioner, replacement, B8444S Service and Repair.

Removing the coolant pump belt pulley, continued




Remove the 4 screws of the belt pulley.

Removing the coolant pump





Remove:
- the 7 screws of the coolant pump
- the coolant pump; scrap the gasket.

Installation

Note! For tightening torques, see: Tightening torque, B8444S Tightening Torque.

Installing the coolant pump
Clean the gasket surface for the coolant pump.





Install:
- a new gasket
- the coolant pump
- the 7 M6 screws. Tighten.

Installing the coolant pump belt pulley




Position the belt pulley but do not tighten the screws.

Installing the auxiliaries belt
Install the auxiliaries belt. See Auxiliaries belt/belt tensioner, replacement, B8444S Service and Repair.

Installing the coolant pump belt pulley, continued
Tighten the 4 M6 screws of the belt pulley.

Check

Caution! Make sure the outlet hose of filling equipment is not blocked as this could damage the cooling system.

Fill with coolant using filling equipment 951 2957 Coolant Reservoir 951 2957 Coolant Reservoir and cover 951 2953 Cover 951 2953 Cover.
Start the engine and allow it to warm to normal operating temperature. Check for leaks and proper function. Fill up fluid as necessary.