Cylinder Block Assembly: Service and Repair

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 Removal and Replacement.
2. Remove the crankshaft balancer. Refer to Crankshaft Damper Removal Overhaul.
3. Remove the front cover. Refer to Engine Front Cover and Oil Pump 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: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.






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

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

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

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






5. Tighten the lower crankcase perimeter bolts in sequence.

Tighten
Tighten the lower crankcase perimeter bolts to 25 Nm (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 Damper Installation Overhaul.
9. Install the engine oil pan. Refer to Oil Pan Installation Overhaul.
10. Install engine. Refer to Engine Replacement Removal and Replacement.