Piston Ring: Service and Repair

REMOVAL
1. Remove cylinder head assembly.
Refer to removal procedure for Cylinder Head.
2. Remove crankcase with oil pan.
Refer to removal procedure for Oil Pan and Crankcase.





3. Remove oil strainer fixing bolts, remove oil strainer assembly with O-ring.
4. Remove three fixing bolts, oil pipe with O-ring.
5. Remove eight fixing bolts, oil gallery.
6. Remove piston with connecting rod assembly, before removing the bearing cap, remove carbon on the top of cylinder bore and push piston with connecting rod out from the top of cylinder bore.

INSTALLATION





1. Install piston with connecting rod assembly.
- Apply engine oil to cylinder bore, connecting rod bearing and crank pin.
- When installing the piston, its front mark must face the engine front side.
- The bearing cap number must be the same as connecting rod number.
- Apply engine oil to the thread and seating surface of each nut.
- Tighten nuts to the specified torque.

Torque: 54 Nm (40 ft. lbs.)

- After tightening the nuts, make sure that the crankshaft rotates smoothly.

NOTE: Do not apply engine oil to the bearing back faces and connecting rod bearing fitting surfaces.





2. Install oil gallery and tighten the bolts in two steps, in the order shown in illustration.

Torque:
1st step: 29 Nm (21 ft. lbs.)
2nd step: 55° - 65°

3. Install oil pipe with O-ring.

Torque: 10 Nm (89 inch lbs.)

4. Install oil strainer assembly with O-ring.

Torque: 25 Nm (18 ft. lbs.)

5. Install crankcase with oil pan.
Refer to installation procedure for Oil Pan and Crankcase.
6. Install cylinder head assembly.
Refer to installation procedure for Cylinder Head.