55. Crankshaft and Bearing Installation

Crankshaft and Bearings Installation

^ Tools Required
- J 36660-A Torque/Angle Meter





1. Install the crankshaft bearings to engine block.
2. Install the crankshaft sensor ring.
3. Install the crankshaft sensor bolts.
Use new crankshaft sensor bolts.

Notice: Refer to Fastener Notice in Service Precautions.

Tighten
Tighten the crankshaft sensor ring bolts to 15 Nm (11 ft. lbs.).
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 ft. lbs.).
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 ft. lbs.).