55. Crankshaft and Bearing Installation

Crankshaft and Bearing Installation

Tools Required
- J 36660-A Torque/Angle Meter

1. Install the crankshaft bearings to engine block.
2. Install the crankshaft sensor ring.

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.

3. Install the crankshaft sensor bolts.
- Use new crankshaft sensor bolts. Tighten the crankshaft sensor ring bolts to 15 Nm (11 lb ft).
4. Install the crankshaft to the engine block.
5. Apply Engine Oil Supplement (EOS), GM P/N 1052367, to the bearing surfaces.
6. Install the main bearings to the main bearing caps.






7. Apply RTV sealer, GM P/N 12345739 or equivalent, in the groove on the side of the fourth main bearing cap.






8. Install the main bearing caps to the engine block. Place the main bearing caps in numerical order.
9. Install the crankshaft bearing bridge.
10. Use new main bearing cap bolts or damage may occur when the final tightening is performed.
11. Install the main bearing cap bolts loosely.






12. Back off the crankshaft bearing bridge adjusting sleeves until the bushings do not contact the engine block when the bridge is fully seated. Tighten the main bearing cap bolts to 50 Nm (37 lb ft).
13. Use the J 36660-A to rotate the main bearing cap bolts in the following sequence:
13.1 The first pass rotate the main bearing cap bolts 60 degrees.
13.2 The second and the final pass rotate the main bearing cap bolts an additional 15 degrees.
14. Adjust the crankshaft bearing bridge adjusting sleeves until the bushings firmly contact the engine block.






15. Install the crankshaft bearing bridge bolts (1). Tighten the crankshaft bearing bridge bolts to 20 Nm (15 lb ft).