Water Pump: Service and Repair

WM 195019 Removing and installing coolant pump





Preliminary work

Preliminary work

1. Remove air cleaner housing.
2. Relieve and remove drive belt.

Warning
Risk of injury from hot engine and hot engine fluids.
Danger of burns, scalding, damage to skin, injury to the eyes.

- Do not carry out work on the engine while it is hot.

Warning
Coolant is hazardous to health.
Risk of skin irritation.

- Wear protective gloves and goggles.

- In the event of contact with the skin or eyes, wash immediately with plenty of water.

3. Drain coolant on engine.
4. Remove coolant hose from reservoir to coolant pump -1-. Collect emerging coolant in a clean container.





Coolant pump coolant feeder hose

5. Remove both catalytic converters.

Danger
Risk of engine failing down.
Danger of fatal injury, material damage.

- Support the engine with the prescribed tool.

6. Support engine in installation position with a transmission jack.
7. Remove engine carrier.





Engine carrier

Removing coolant pump

Removing coolant pump

Warning
Coolant is hazardous to health.
Risk of skin irritation.

- Wear protective gloves and goggles.

- In the event of contact with the skin or eyes, wash immediately with plenty of water.

1. Unscrew seven fastening screws (two M6 x 30 -2-, five M6 x 25 -1-) to coolant pump, remove pump.





Screw arrangement for coolant pump

2. Cut through seal webs -arrows- in the combination seal, remove old seal.





Connection points for coolant pump combination seal

Installing coolant pump

Installing coolant pump

1. Clean sealing face of coolant pump with solvent naphtha or acetone, remove with emery cloth if necessary and then degrease.
2. Clean sealing face on crankcase with solvent naphtha or acetone. Remove any residues beforehand with an emery cloth.





Sealing faces on crankcase

3. Separate new combination seal at the dot-dash line.





Separating combination seal for coolant pump

4. Position coolant pump with new seal on crankcase using two screws, note position of dowel sleeves.
5. Position remaining screws. The longer screws (M6 x 30) -2- are installed at the dowel sleeve position.





Screw arrangement for coolant pump

6. Tighten all screws equally in diagonally opposite sequence. - Tightening torque: 10 Nm (7.5 ftlb.)
7. Position drive belt on pulley.

Subsequent work

Subsequent work

Warning
Coolant is hazardous to health.
Risk of skin irritation.

- Wear protective gloves and goggles.

- In the event of contact with the skin or eyes, wash immediately with plenty of water.

Information
To facilitate assembly of coolant pipes and hoses, smear with Kluber Syntheso Glep or alternatively Kluberplus S06-100 assembly gel.

1. Fit coolant hose.
2. Install engine carrier. - Tightening torque: 65 Nm (48 ftlb.) - Tightening torque: 10 Nm (7.5 ftlb.)
3. Move transmission jack from work area.
4. Install catalytic converters.
5. Fit drive belt.
6. Install air cleaner housing.
7. Fill coolant and bleed system.
8. Perform a test drive, adjusting the coolant level in the container if necessary (note minimum/maximum marking).