Inner Diameter of Cylinder Bore
- Using a bore gauge, measure cylinder bore for wear, out-of-round and taper at 6 different points on each cylinder. (X and Y directions at A, B and C). The Y axis is in the longitudinal direction of the engine.
Standard inner diameter: 89.000 - 89.030 mm (3.5039 - 3.5051 in)
Wear limit: 0.2 mm (0.008 in)
Out-of-round (difference between, X - Y): 0.015 mm (0.0006 in)
Taper limit (difference between, C - A): 0.01 mm (0.0004 in)
- If the measured value rebore exceeds the limit, or if there are scratches and/or seizure on the cylinder inner wall, hone the inner wall.
- An oversize piston is provided. When using an oversize piston, rebore the cylinder so that the clearance of the piston cylinder satisfies the standard.
Over size (OS): 0.2 mm (0.008 in)
NOTE:
When determining cylinder bore grade, measure cylinder bore at B position.