Rear Crankshaft Main Bearing Seal: Service and Repair

Crankshaft Rear Oil Seal Replacement
Tools Required
^ J34686 Rear Main Seal Installer

Removal Procedure





1. Remove the flywheel.
With Automatic Transmission Service and Repair
With Manual Transmission Flywheel>

Important: Do not nick the crankshaft sealing surface when removing the seal.

2. Insert a flat-bladed or similar tool through the dust lip at an angle.
3. Pry the crankshaft rear oil seal out by moving the handle of the tool towards the end of the crankshaft.
4. Repeat, as necessary around the crankshaft rear oil seal, until the seal is removed.

Installation Procedure

Notice: Do not apply or use any oil lubrication on the crankshaft rear oil seal, or the seal installer. Do not touch the sealing lip of the oil seal once the protective sleeve is removed. Doing so will damage/deform the seal.

Notice: Clean the crankshaft sealing surface with a clean, lint free towel. Inspect lead-in edge of crankshaft for burrs/sharp edges that could damage the rear main oil seal. Remove burrs/sharp edges with crocus cloth before proceeding.





Important:

Notice: the direction of the rear oil seal. The new design seal is a reverse style as opposed to what has been used in the past. "THIS SIDE OUT" has been stamped into the seal, as shown in the graphic.

1. Carefully remove the protection sleeve from the NEW crankshaft rear oil seal.
2. Install the crankshaft rear oil seal onto the J34686 by sliding the crankshaft rear oil seal over the mandrel using a twisting motion until the back of the crankshaft rear oil seal bottoms squarely against the collar of the tool.
3. Perform the following steps in order to install the crankshaft rear oil seal:
A. Align the dowel pin of the J34686 with the dowel pin in the crankshaft.
B. Attach the J34686 to the crankshaft by hand, or tighten the attaching screws to 5 Nm (45 inch lbs.).
C. Turn the T-handle of the J34686 in order to engage and allow the collar to push the seal into the bore. Turn the handle until the collar is tight against the engine block. Ensure that the seal is seated properly.
D. Loosen the T-handle until the handle comes to a stop.
E. Remove the attaching screws.
4. Install the engine flywheel.