Component Checks (page 2 of 3)

Caution
Oil beneath the head of all the main bearing bolts. Do not oil threads. ‘Hand start’ them into their holes.

Note the positions of the stud bolts at No. 3 and 6 main bearing caps from removal.

3. Install and ‘seat’ the main bearings and caps.
4. Insert the inner and outer bolts to all main bearing caps.
5. Lightly ‘run down’ the bolts to seat the main bearing caps.
6. Release all bolts approx. one turn.

To install the bearing caps spread the engine block side walls using the engine block spreading tool (Refer to ’303-664 (Crankshaft Rear Oil Seal Install)’, page 20-1-5), tensioned to 25 Nm.

To avoid overstriking engine block walls, do not exceed 25 Nm. on engine block spreader bolt.

4. Set No. 4 main bearing so the end loads are taken on both the upper and lower bearing thrust faces.
5. Bias the crankshaft maximum rearward against the upper thrust bearing.
6. With the crankshaft fully rearward, bias No. 4 bearing cap maximum rearward against the crankshaft thrust face.
7. Bias the crankshaft forward.

5. Torque the main bearing cap bolts, in the sequence detailed, to:
1. Bolts 1 to 14 - 37-43 Nm.
2. Bolts 15 to 28 - 22-28 Nm.
3. Bolts 1 to 28 - rotate 85°-95°

6. Insert the main caps side bolts. Torque the main cap side bolts, in sequence detailed, to:
1. Bolts 29 to 42 - 22-28 Nm. + 40°-50°

7. Check the crank shaft end play.

Check and, if required, adjust No. 1 main bearing cap so that the front face does not protrude forward of the oil pump mounting face.

Main bearing bolts are torqued to yield. They must be tightened precisely as specified.