Cylinder Block and Bore

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 Core Plugs. Engine Core and Oil Gallery Plugs
3. Examine block and cylinder bores for cracks or fractures.

CYLINDER BORE INSPECTION





Fig. 134

The cylinder walls should be checked for out-of-round and taper with Tool C-119 (Fig. 134). 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. Cylinder Bore Honing
Measure the cylinder bore at three levels in directions A and B (Fig. 134). 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. For specifications, refer to General Specifications. Engine Specifications