System Specifications

Cylinder bore diameter - grade 1 90.200-90.210 mm (3.5512-3.5516 inch)
Cylinder bore diameter - grade 2 90.210-90.220 mm (3.5516-3.5520 inch)
Cylinder bore diameter - grade 3 90.220-90.230 mm (3.5520-3.5524 inch)
Cylinder bore maximum taper 0.006 mm (0.0002 inch)
Cylinder bore maximum out-of-round 0.020 mm (0.0008 inch)
Main bearing bore inside diameter 72.401-72.422 mm (2.850-2.851 inch)
Head, gasket surface flatness 0.05 mm (0.0020 inch) in any 150 mm x 150 mm (6.0 in x 6.0 inch) area
Piston diameter - grade 1 (at right angle to pin bore) 90.175-90.165 mm (3.5502-3.5498 inch)
Piston diameter - grade 2 (at right angle to pin bore) 90.185-90.175 mm (3.5506-3.5502 inch)
Piston diameter - grade 3 (at right angle to pin bore) 90.195-90.185 mm (3.5510-3.5506 inch)
Piston-to-cylinder bore clearance (at grade size) 0.025-0.045 mm (0.0010-0.0018 inch)
Piston ring end gap - top 0.13-0.28 mm (0.0051-0.0110 inch)
Piston ring end gap - intermediate 0.25-0.40 mm (0.0098-0.0158 inch)
Piston ring end gap - oil control 0.15-0.65 mm (0.0059-0.0256 inch)
Piston ring groove width - top 1.53-1.55 mm (0.0602-0.0610 inch)
Piston ring groove width - intermediate 1.52-1.54 mm (0.0598-0.0606 inch)
Piston ring groove width - oil control 3.030-3.050 mm (0.1193-0.1201 inch)
Piston ring width 1.49-1.46 mm (0.0587-0.0575 inch)
Piston ring-to-groove clearance - top 0.030-0.050 mm (0.0012-0.0020 inch)
Piston ring-to-groove clearance - intermediate 0.030-0.080 mm (0.0012-0.0031 inch)

For torque specifications, refer to the service procedure.