Cylinder Block Assembly: Testing and Inspection
CYLINDER BLOCK CLEANING AND INSPECTION1. Clean cylinder block thoroughly and check all core hole plugs for evidence of leaking. Replace if necessary
2. Examine block and cylinder bores for cracks or fractures.
CYLINDER BORE INSPECTION
Checking Cylinder Bore Size:
The cylinder walls should be checked for out-of-round and taper with Special Tool 6879. If the cylinder walls are badly scuffed or scored, the cylinder block should be re bored 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 for specification and procedures.
Measure the cylinder bore at three levels in directions A and B. Top measurement should be 10 mm ( 3/8 in.) down and bottom measurement should be 10 mm ( 3/8 in.) up from bottom of bore. Refer to chart above for specifications.
SIZING PISTONS
Piston Installation And Sizing Information:
Piston and cylinder wall must be clean and dry. Piston diameter should be measured 90 degrees to piston pin at size location shown. Cylinder bores should be measured halfway down the cylinder bore and transverse to the engine crankshaft center line.
Pistons and cylinder bores should be measured at normal room temperature; 70°F (21°C).