1. With the engine removed from the vehicle, remove the pistons and connecting rods as described in Chapter 45.
2. Remove the oil pump (Chapter 44) and rear seal with cover (Chapter 43).
3. Check that each main bearing cap is numbered.
4. Loosen and remove cap screws #1, 2, 3, 5, and 6, then remove caps.
5. With cover No. 4 installed, determine the crankshaft side play with a feeler gauge by inserting it between the thrust washer and the crankshaft web. Compare the wear in the thrust washers with the side play given in Specifications.
6. Unscrew and remove the No. 4 main bearing cap (photo).
7. Store each bearing shell with a cover.
8. Lift the crankshaft out of the crankcase (photo).
9. Remove the bearing shells from the crankcase.
10. Further see Part A, Chapter 22, but note that on some models the rear bearing is secured in the flywheel with two circlips
11. Place cylinder block on bench, crankcase up.
12. Position the upper main bearing shells in the crankcase so that the tabs fit into the recesses. Lubricate the liners. If old bearings are installed, make sure they are in place. All of them must have lubrication grooves.
13. Lower the crankshaft into the crankcase.
14. Position the lower main bearing shells in the caps.
15. Place thrust washers on each side of #4 cover, using lubricant to secure them in position. Make sure the oil grooved surface is facing out.
16. Lubricate the bearing shell, then install the No. 4 main bearing cap, insert and tighten the bolts with the tightening torque specified in the Specification.
17. Use a feeler gauge or micrometer to check that the side play matches the data in the Specifications.
18. Lubricate the remaining liners of main bearings, then install the covers, insert and tighten the bolts with the torque specified specification.
19. Check that the crankshaft rotates freely.
20. Install rear oil seal and shroud (Chapter 43), oil pump (Chapter 44), pistons and connecting rods (Chapter 47).
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