Sealant Replacement - Lower Crankcase to Engine Block

Sealant Replacement - Lower Crankcase to Engine Block

Special Tools

J 45059 Angle Meter


Removal Procedure





1. Remove the engine from the vehicle. Refer to Engine Replacement (Engine Replacement) .
2. Remove the crankshaft balancer. Refer to Crankshaft Balancer Removal (Overhaul) .
3. Remove the front cover. Refer to Camshaft Cover Removal (Overhaul) .
4. Remove the engine oil pan. Refer to Oil Pan Removal (Overhaul) .
5. Remove the crankshaft position sensor.
6. Remove the 3 perimeter bolts.

Important: Do not forget the 2 outside rear bolts.


7. Remove and discard the crankshaft bearing bolts.
8. Using the pry points and an appropriate prying tool, gently separate the upper and lower crankcase.
9. Clean the sealing material from the engine block and lower the crankcase.



Installation Procedure

1. Apply oil to the crankshaft bearing surfaces.




2. Apply a 2-5 mm (0.08-0.20 in) bead (a) of sealer GM P/N 12378521 (Canadian P/N 88901148) to the surface of the engine block-to-lower crankcase mating surface.




3. Install the lower crankcase.
Tap gently into place with a suitable tool, if necessary. Ensure it is aligned properly on the dowels.





Notice: Refer to Fastener Notice .

4. Install the NEW crankshaft bearing bolts in sequence finger tight.

1. Tighten the crankshaft bearing bolts in sequence.

Tighten the crankshaft bearing bolts to 20 N.m (15 lb ft).

2. Tighten the crankshaft bearing bolts in sequence using the J 45059 .

Tighten the crankshaft bearing bolts to 70 degrees using the J 45059 .






5. Tighten the lower crankcase perimeter bolts in sequence.

Tighten the lower crankcase perimeter bolts to 25 N.m (18 lb ft).

6. Install the crankcase position sensor.
7. Install the front cover. Refer to Engine Front Cover and Oil Pump Installation (Overhaul) .
8. Install the crankshaft balancer. Refer to Crankshaft Balancer Installation (Overhaul) .
9. Install the engine oil pan. Refer to Oil Pan Installation (Overhaul) .
10. Install the engine. Refer to Engine Replacement (Engine Replacement) .