Cleaning and Inspection

1. Clean cylinder block thoroughly and check all core hole plugs for evidence of leaking.
2. If new core plugs are installed, Refer to Engine Service Procedures, Standard Service Procedures.
3. Examine block and cylinder bores for cracks or fractures.

CYLINDER BORE INSPECTION

Figure 131:

The cylinder walls should be checked for out-of round and taper with Tool C-119. The cylinder bore out-of-round is 0.050 mm (0.002 inch) maximum and cylinder bore taper is 0.051 mm (0.002 inch) maximum. If the cylinder walls are badly scuffed or scored, the cylinder block should be rebored and honed, and new pistons and rings fitted. Whatever type of boring equipment is used, boring and honing operation should be closely coordinated with the fitting of pistons and rings in order that specified clearances may be maintained. Refer to Honing Cylinder Bores outlined in the Standard Service Procedures found under Engine Service and Repairs.
Measure the cylinder bore at three levels in directions A and B (Fig. 131). Top measurement should be 10 mm (3/8 inch) down and bottom measurement should be 10 mm (3/8 inch) up from bottom of bore. Refer to Cylinder Bore and Piston Specification Chart for specifications.





CYLINDER BORE AND PISTON SPECIFICATION CHART