9-1
Cylinder / Piston
9. Cylinder / Piston
Service Information …………………9-1
Troubleshootint ……………………9-1
Cylinder ………………………………9-2
Piston …………………………………9-3
Piston/Cylinder Installation ………9-5
Service Information
Geaneral
When removing the cylinder, avoid damaging the cylinder joint part with a driver or cooling pin by
hitting the cylinder strongly.
Avoid damaging the inside of the cylinder and piston surface.
Lower or uneven compression
Worn piston
Worn, damaged piston rings.
Worn cylinder.
Excessive smoke from muffler
Worn cylinder, piston, and piston rings.
Improperly installed piston rings.
Damaged piston, cylinder.
Overheating
Excessive carbon deposits on piston head.
Piston noise
Worn cylinder and piston.
Worn piston pin, connecting rod small end.
Damaged piston rings.
Excessive carbon deposits on piston head.
Troubleshooting
Item Standard Service Unit
I.D 56.500-56.510(2.2244-2.2248) 56.60(2.228)
Cylinder Outer of round 0.1(0.004)
Taper 0.05(0.002)
Warpage 0.1(0.004)
Piston O.D. 56.470-56.490(2.2232-2.2240) 56.37(2.219)
Piston pin hole I.D 15.002-15.008(0.5906-0.5909) 15.04(0.592)
Piston Piston Pin O.D 14.994-15.000(0.5903-0.5906) 14.96(0.589)
Piston Pin Piston pin-to-piston clearance 0.002-0.14(0.0001-0.0006) 0.02(0.001)
and
Piston ring-to-groove
top 0.015-0.045(0.0006-0.0018) 0.09(0.004)
Piston Ring clearance second 0.015-0.045(0.0006-0.0018) 0.09(0.004)
Piston ring top/second 0.10-0.25(0.004-0.010) 0.5(0.02)
end gap oil(side rail) 0.2-0.7(0.01-0.03) 1.1(0.04)
Piston-to-cylinder clearance 0.010-0.040(0.0004-0.0016) 0.15(0.006)
Connecting rod small end I.D. 15.010-15.028(0.5909-0.5917) 15.06(0.593)
Connecting rod small end-piston pin clearance 0.010-0.034(0.0004-0.0013) 0.04(0.002)
Specifications
Unit: mm(in)
9
To Next Page
Loading...
Need help?
General
