Timing Cover: Service and Repair

^ Tools Required
- J41476 Front and Rear Cover Alignment (at crankshaft seal area)

Removal Procedure





1. Remove the water pump. Refer to Water Pump Replacement in Cooling System.
2. Remove the crankshaft balancer from the crankshaft. Refer to Crankshaft Balancer Removal.
3. Remove the engine front cover from the engine. Refer to Engine Front Cover Removal.
4. Clean and inspect all parts. Refer to Engine Front Cover Clean and Inspect.

Installation Procedure

Important:
^ Do not reuse the crankshaft oil seal or front cover gasket.
^ Do not slide the front cover/gasket across the oil pan gasket.
^ The special tool in this procedure is used to properly align the crankshaft front oil seal.
^ The crankshaft front oil seal MUST be centered in relation to the crankshaft.
^ An improperly aligned front cover may cause premature front oil seal wear and/or engine assembly oil leaks.





1. Apply a 5 mm (0.20 inch) bead of GM P/N 12378190 to the corner were the oil pan meets the engine block.
2. Install the front cover, gasket and bolts on to the engine.
3. Tighten the cover bolts finger tight. Do not overtighten.

Important: Align the tapered legs of the tool with the machined alignment surfaces on the front cover.





4. Align the J41476.

Notice: Refer to Fastener Notice in Service Precautions.

5. Install the crankshaft balancer bolt.
5.1. Tighten the crankshaft balancer bolt by hand until snug. Do not overtighten the bolt.
5.2. Snug the oil pan-to-cover bolts in order to position the cover at the pan rail.
5.3. Tighten the oil pan-to-front cover bolts to 25 N.m (18 lb ft).
5.4. Tighten the front cover bolts to 25 N.m (18 lb ft).
6. Remove J41476 from the front cover.
7. Install the front crankshaft oil seal. Refer to Crankshaft Front Cover Oil Seal Installation.
8. Install the crankshaft balancer to the crankshaft. Refer to Crankshaft Balancer Installation.
9. Install the water pump. Refer to Water Pump Replacement in Cooling System.