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Remove the connecting rod bolts 6 and connecting rod
5.
cap 7, and then remove the crankshaft 8 and oil seals.
6.
Remove the metal bearings from the cylinder block and
crankcase.
7.
Remove the connecting rods and piston assemblies from
the cylinder block.
• Removed bearings should be arranged in the
order they are removed.
• Mark individual pistons with the number a
corresponding to their cylinders.
• Connecting rods and caps should be arranged
as pairs in the order they are removed.
Removed parts should be arranged so that they
can be reassembled in their original positions
and orientations.
• Do not reuse piston pin clips. Be sure to replace
with new ones.
Remove the piston pin clip 9 and piston pin, and then
8.
remove the piston.
31) Inspection of Cylinder Block
1.
Check if there are any scratches on the mating surfaces of
the cylinder block and cylinder head.
Repair or replace the cylinder block if there are any
scratches that may affect the sealing performance.
To carry out repairs, lay #240-400 water-resistant
sandpaper on top of the surface plate, shape the
surface, and then use #600 sandpaper for the
final finishing.
Use a straight edge 1 and thickness gauge 2 to check
2.
the distortion of the cylinder in the directions shown in the
diagram.
Repair or replace the cylinder block if greater than the
specified value.
Distortion on cylinder block mating surface:
Standard value
0.05 mm (0.0020 in) or less
Functional Limit:
0.1 mm (0.0039 in)
5-66
9
Do not reuse.
4st 25/30 2022
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