Cylinder block and crank connecting rod mechanisms
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4. If the distortion of cylinder block exceeded the max.value with the height within the
range of standard value, grind the height or replace the cylinder block.
Max. grinding size: 0.20mm {0.008in}
5. As shown in the following figure, measure the I/D of cylinder with an I/D dial gauge
at 37mm{1.45in} away from the surface, in the directions of X and Y, .
6. If the I/D of cylinder exceeded the wear limit, replace the cylinder block or rebore the
cylinder and fit the oversized piston to have it conform to the standard clearance of
between the piston and cylinder.
Wear limit: 0.15mm {0.006in}
Attention
l The diameter of cylinder boring shall be determined according to the
oversized diameter of piston. All cylinders shall be in the same diameter.
l In order to prevent the heat generation at the time of boring, resulting in
distortion of cylinder block, the cylinders shall be bored in the following
order: 2→4→1→3.
l A honing margin of 0.02mm {0.000787in} shall be reserved by boring. After
the boring, hone the cylinder bore until the last process size.
Upper face of cylinder block
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