Front Crankshaft Seal: Service and Repair

WM 137419 Removing and installing crankshaft sealing ring for pulley/vibration balancer

Preliminary work

1. Remove vibration balancer -> 137619 Removing and installing pulley/vibration balancer - section on "Removing" Service and Repair.

Removing crankshaft sealing ring for pulley/vibration balancer

1. Unscrew the four fastening screws and remove the cover with the sealing ring.





Removing cover with sealing ring

2. Clean the sealing surface of the sheetmetal cover.

Installing crankshaft sealing ring for pulley/vibration balancer

Information

Sealing rings become damaged as a result of improper fitting. Do not oil sealing rings on the running surface and do not pull sealing rings off the plastic sleeve.

Information

- If the joint flange on the pulley or the surface on the crankshaft stub is slightly rusted, polish the rust off with a special polishing pad.

- If there is bad corrosion or deep grooves, replace these components.

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.

1. Place seal with plastic sleeve across crankshaft.





Seal with plastic sleeve

2. Tighten the two upper fastening screws and then the lower fastening screws by hand. Then tighten the screws crosswise to the specified torque (aluminium screws).





Fastening screws on joint flange (sealing ring)





Chain tensioner, joint flange





3. Pull plastic sleeve straight off the joint flange.





Plastic sleeve

Subsequent work

1. Install vibration balancer -> 137619 Removing and installing pulley/vibration balancer - section on "Installing" Service and Repair.