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Home >> BMW >> 1978 >> 630CSi Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 5301, 633CSI & 733I 6 Cylinder >> Crankshaft Main & Connecting Rod Bearings >> Rear Main Bearing Oil Seal Replacement

Rear Main Bearing Oil Seal Replacement

NOTE: To replace rear main hearing oil seal in vehicle, transmission must be removed.
  1. Remove clutch and flywheel and drain engine oil. Remove bolts securing oil pan to rear main bearing oil seal mount.
  2. Pry oil pan down at area around seal mount, taking care not to damage gasket. Remove bolts securing seal mount to crankcase and remove mount.
    Fig 1: Installing Rear Main Bearing Oil Seal
    G09334313Courtesy of BMW OF NORTH AMERICA, INC.
  3. Pry old seal from mount and install new one using driver and adapter (00 5 500 and 11 1 260). Use guide (11 2 213) when replacing mount to prevent damage to seal. Pack seal lips with grease and apply Atmosit (or equivalent) sealer to junction of oil pan and seal mount. Reverse removal procedure to complete installation.
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