When replacing the ring without correcting the cylinder bore, check the gap with the ring situated at the lower
part of cylinder that is less worn out.
Piston ring service size and mark
[Standard dimensions]
No.1 : 0.20 ~ 0.35mm (0.0079 ~ 0.0138in.)
No.2 : 0.37 ~ 0.52mm (0.0146 ~ 0.0205in.)
[Limit]
No.1, No.2 : 0.8mm (0.031in.)
Oil ring side rail : 1.0mm (0.039in)
Standard None
0.25mm (0.010in.) O.S
0.50mm (0.020in.) O.S
25
50
The mark can be found on the upper side of the ring next to the end.
1. When the connecting rod cap is installed, make sure that the cylinder numbers, marked on rod end cap at
disassembly, match. When a new connecting rod is installed, make sure that the notches holding the bearing
in placeare on the same side.
2. Replace the connecting rod if it is damaged at either end of the thrust faces. If it has a stratified wear, or if the
surface of the inside diameter of the small end is severely rough, replace the rod.
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