Water Pump: Service and Repair

WM 195019 Removing and installing coolant pump

Tools





Preliminary work

1. Drain cooling system. -> 193817 Draining and filling in coolant Service and Repair
2. Remove intake pipe upstream of throttle valve and drive belt. -> 243519 Removing and installing cowl for throttle housing 243519 Removing and installing air box for throttle housing (Y-shaped pipe ahead of throttle valve)

Information

Component overview

Information

- The water pump for the V6 can be confused with the water pump for V8 engines.

- The water pump for the V6 must not be installed in V8 engines. Heat damage!

- Do not store the V6 water pump together with V8 water pumps.

- The water pump for the V6 has a colour marking with the inscription V6 on the housing.

- Mark a V6 water pump clearly with a pen if the V6 inscription is missing.





Coolant pump









Tightening sequence for coolant pump





V6 coolant pump

Removing coolant pump

Information

- To ease removal, spray the pulley from the rear side with an anti-corrosion agent.

1. Loosen the three fastening screws on the coolant pump pulley. -Pfeile- Block pulley with a holder Nr.38 or brace Nr.193 if necessary or if the belt drive is removed.





Fastening screws for coolant pump pulley

2. Detach drive belt from water pump. For details, see -> 137819 Removing and installing drive belt 137819 Removing and installing drive belt

NOTICE

Incorrect handling of pulley

- Risk of damage to pulley

-> The pulley is sensitive to impact. Do not prise off the pulley with a screwdriver.
-> Do not re-use a damaged pulley.

3. Unscrew three loosened fastening screws from pulley => Belt pulley and remove pulley.





Belt pulley

4. Unscrew fastening screws => Coolant pump mounting -3- from coolant pump and remove pump. => Removing coolant pump.





Coolant pump mounting





Coolant pump









Removing coolant pump.

5. If pump is stuck, loosen it by tapping gently with a plastic hammer. => Loosening coolant pump with a plastic hammer





Loosening coolant pump with a plastic hammer

Installing coolant pump

Information

The tightening specifications for the basic engine are stored centrally. -> 1001IN Tightening torques, tightening sequences, assembly overviews [1][2]Specifications. Tightening torques and assembly instructions for other affected assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.

Information

- The water pump for the V6 can be confused with the water pump for V8 engines.

- The water pump for the V6 must not be installed in V8 engines. Heat damage!

- Do not store the V6 water pump together with V8 water pumps.

- The water pump for the V6 has a colour marking with the inscription V6 on the housing.

- Mark a V6 water pump clearly with a pen if the V6 inscription is missing.

1. Clean sealing faces. Fit coolant pump with new seal.





Coolant pump





2. Tighten fastening screws.





Tightening sequence for coolant pump

NOTICE

Incorrect handling of pulley

- Risk of damage to pulley

-> The pulley is sensitive to impact. Do not prise off the pulley with a screwdriver.
-> Do not re-use a damaged pulley.

3. Fit the pulley on the coolant pump. Screw in the three fastening screws by hand.
4. Tighten the three fastening screws on the coolant pump pulley. Block the pulley with a brace Nr.38 if necessary.





Fastening screws for coolant pump pulley

Subsequent work

1. Fit drive belt. -> 137819 Removing and installing drive belt 137819 Removing and installing drive belt
2. Install intake manifold. -> 243519 Removing and installing cowl for throttle housing 243519 Removing and installing air box for throttle housing (Y-shaped pipe ahead of throttle valve)
3. Fill and bleed the cooling system according to instructions. -> 193817 Draining and filling in coolant Service and Repair