Crankshaft Main Bearing(s) - Installation

INSTALLATION - CRANKSHAFT MAIN BEARINGS

NOTE: One main bearing should be selectively fitted while all other main bearing caps are properly tightened.

1. For main bearing fitting procedure, Refer to - CRANKSHAFT MAIN BEARINGS
2. Start bearing in place, and insert Main Bearing Tool C-3059 into oil hole of crankshaft (Figure 2).
3. Slowly rotate crankshaft counterclockwise sliding the bearing into position. Remove Special Main Bearing Tool C-3059.
4. Inspect main cap bolts for stretching (Figure 1). Replace bolts that are stretched.

NOTE: The main cap bolts should be examined before reuse. Bolt stretch can be checked by holding a scale or straight edge against the threads. If all the threads do not contact the scale the bolt must be replaced (Figure 1).




Figure 1 Check for Stretched (Necked) Bolts






5. Install each main cap and tighten bolts finger tight.
6. Tighten number 1, 3 and 4 main cap bolts to 41 Nm + 1/4 Turn (30 ft. lbs.+ 1/4 Turn).
7. Rotate the crankshaft until the number 6 piston is at TDC.
8. To ensure correct thrust bearing alignment the following procedure must be done:
- Move crankshaft all the way to the rear of its travel.
- Then, move crankshaft all the way to the front of its travel.
- Wedge an appropriate tool between the rear of the cylinder block and rear crankshaft counterweight. This will hold the crankshaft in it's most forward position.
- Tighten the #2 Thrust Bearing cap bolts to 41 Nm + 1/4 Turn (30 ft. lbs.+ 1/4 Turn). Remove the holding tool.
9. Install oil pan.
10. Fill engine crankcase with proper oil to correct level.





Figure 2 Upper Main Bearing Removing/Installing With Special Tool C-3059