Rear Main Oil Seal Leak

Repair Procedure for Rear Main Oil Seal Leak





1. Place a bead of Loctite 515 on the block at both rear main bearing cap joint areas and on the joint face about 1/2 inch from the rear of the block (figure 3).



2. Make sure that the lower rear main bearing insert is in place. Install the rear main bearing cap and snug bolts.

NOTE:
New main bearing cap bolt and stud must be used during reassembly. See Parts Information.

3. Align the rear main bearing cap so that the rear seal stop (approximately 1/2 inch inward in the rear oil seal bore) of the block and the cap line up. This will assure that the rear main oil seal will seat squarely when installed in the bore.

4. Torque the rear main cap bolts to 90-104 N-m (66-77 Ft.Lb.).

5. Fill the cavities of the "wedge seal" on both sides of the rear main cap and the small groove in the oil pan gasket area of the rear main cap with Loctite 515.

6. Place the "wedge seal" into position using a flat blade screwdriver to fully seat it. This will force the excessive sealer out. Do not remove the excess sealer.

NOTE:
When reassembling, use a new "wedge seal" (ZZLO 11 399). This seal is included in the gasket kit.

7. Reinstall the oil pump and windage tray. Torque to 17-21 N-m (13-15 Ft.Lb.).

8. Coat the oil seal-to-cylinder block surface of the oil seal and heavy SG engine oil. Coat the seal contact surface of the oil seal and crankshaft with heavy SG engine oil.





9. Place the seal in the Rear Main Seal Installer Tool (49UN 01 009). Next, put the tool in position and start threading the flywheel bolts. Screw seal into position until seal is firmly seated into place (figure 4).

10. Install the flywheel. Tighten the flywheel bolts to 80 N-m (59 Ft.Lb.) using the standard crosstightening sequence.






11. Install the selected spacers to the mounting pads on the rear of the oil pan before bolting the engine and transmission together (chart 1).

NOTE:
The transmission bolts to the engine and oil pan when installed. It is important to measure the gap between the surface of the rear face of the oil pan (at the spacer locations) and the rear face of the engine block.








When using the straight edge to align the block and oil pan, it is important that the rear surface of the oil pan and block are vertically aligned. If not perfectly aligned, measure the difference and install the appropriate spacer (figure 5 and chart 1).

12. Install engine back into the vehicle.