2-- 33
62--11362
2.3.5 Cylinder
a. Top
b. Middle
c. Bottom (skirt)
a. Right--angled to
Piston Pin
b. Piston Pin Direction
1. Cylinder I.D.
(before correction)
2. Oversize Cylinder I.D.
2.3.5.a Cylinder Wear
1. Measure the I.D. of the cylinder at the six positions
(seefigurewithacylinder gauge tofindthemaximum
and minimum I.D.’s.
2. Determine the difference (maximum wear) between
the maximum and minimum I.D.’s.
3. Ifthewearexceeds theallowablelimit,boreandhone
to the oversize dimension. (refer to Correcting
Cylinder)
4. Visually checkthe cylinderwall for scratches. If deep
scratches are found, the cylinder walls should be
bored. (refer to Correcting Cylinder)
Cylinder I.D.
Factory
Specification
83.000 to 83.022 mm
3.2678 to 3.2685 in.
Maximum W ear
Allowable
Limit
83.170 mm
3.2744 in.
2.3.5.b Correcting Cylinder (Oversize +0.25 mm)
1. Whenthecylinder is wornbeyond the allowablelimit,
bore and hone it to the specified dimension.
Cylinder I.D.
Factory
Specification
83.250 to 83.272 mm
3.2776 to 3.2784 in.
Maximum W ear
Allowable
Limit
83.420 mm
3.2843 in.
Finishing
Hone to 2.2 to 3.0 mm μRmax.
(0.00087 to 0.00118 in. μRmax.)
2. Replace the piston and piston rings with oversize
(+0.25 mm) ones.
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