Crankshaft Seal Retainer: Service and Repair

Engine Rear Cover Replacement

Tools Required
^ J41476 Front and Rear Cover Alignment
^ J41479 Crankshaft Rear Oil Seal Installer

Removal Procedure
1. Remove the engine flywheel.
2. Remove the oil pan-to-rear cover bolts.





3. Remove the rear cover bolts.
4. Remove the rear cover and gasket.
5. Discard the rear cover gasket.
6. Clean and inspect the engine rear cover. Refer to Crankshaft Rear Oil Seal Housing Cleaning and Inspection.

Installation Procedure

Important:
^ Do not reuse the crankshaft oil seal or rear cover gasket.
^ Do not apply any type of sealant to the rear cover gasket (unless specified).
^ The special tool in this procedure is used to center the crankshaft rear oil seal.
^ All gasket surfaces should be free of oil or other foreign material during assembly.
^ The crankshaft rear oil seal MUST be centered in relation to the crankshaft.
^ The crankshaft rear oil seal will be installed after the rear cover has been installed.
^ An improperly aligned rear cover may cause premature rear oil seal wear and/or engine assembly oil leaks.

1. Apply a 5 mm (0.20 inch) bead of sealant GM P/N 12378521 (Canadian P/N 88901148), or equivalent 20 mm (0.80 inch) long to the oil pan to engine block junction.





2. Install the rear cover gasket and cover.
3. Install the rear cover bolts until snug. Do not overtighten.





4. Rotate the crankshaft until 2 opposing flywheel bolt holes are parallel to the oil pan surface.

Important: The tapered legs of the alignment tool must enter the rear cover oil seal bore.

5. Install the J41476 and bolts onto the rear of the crankshaft.

6. Notice: Refer to Fastener Notice.

Tighten the J41476 bolts until snug. Do not overtighten.
1. Tighten the oil pan-to-rear cover bolts to 12 Nm (106 inch lbs.).
2. Tighten the engine rear cover bolts to 25 Nm (18 ft. lbs.).
7. Remove the J41476.





8. Important:
^ Do not lubricate the oil seal inside diameter (ID) or the crankshaft surface.
^ Do not reuse the crankshaft rear oil seal.

Lubricate the outside diameter (OD) of the oil seal (1) with clean engine oil. Do not allow oil or other lubricants to contact the seal surface.
9. Lubricate the rear cover oil seal bore with clean engine oil. Do not allow oil or other lubricants to contact the crankshaft surface.





10. Install the J41479 cone (2) and bolts onto the rear of the crankshaft.
11. Tighten the bolts until snug. Do not overtighten.
12. Install the rear oil seal onto the tapered cone (2) until the tool (1) contacts the oil seal.
13. Thread the J41479 threaded rod into the tapered cone (2) until the tool (1) contacts the oil seal.
14. Align the oil seal onto the tool (1).
15. Rotate the handle of the J41479 clockwise until the seal enters the rear cover and bottoms into the cover bore.
16. Remove the J41479.
17. Install the engine flywheel.