Piston: Service and Repair

REMOVE PISTON RINGS






1. Using a piston ring expander, remove the 2 compression rings.
2. Remove the 2 side rails and oil ring expander by hand.

NOTE: Arrange the piston rings in correct order only.

DISCONNECT CONNECTING ROD FROM PISTON






1. Using a small screwdriver, remove the 2 snap rings.
2. Gradually heat the piston to about 80�C (176�F).






3. Using a plastic-faced hammer and brass bar, lightly tap out the piston pin and remove the connecting rod.

NOTE:
^ The piston and pin are a matched set.
^ Arrange the pistons, pins, rings, connecting rods and bearings in the correct order.

ASSEMBLE PISTON AND CONNECTING ROD






1. Install a new snap ring at one end of the piston pin hole.

NOTE: Be sure that end gap of the snap ring is not aligned with the pin hole cutout portion of the piston.

2. Gradually heat the piston to about 80°C (176°F).
3. Coat the piston pin with engine oil.






4. Align the front marks of the piston and connecting rod, and push in the piston pin with your thumb.
5. Install a new snap ring at the other end of the piston pin hole.

NOTE: Be sure that end gap of the snap ring is not aligned with the pin hole cutout portion of the piston.

INSTALL PISTON RINGS
1. Install the oil ring expander and 2 side rails by hand.






2. Using a piston ring expander, install the 2 compression rings with the code mark facing up.
- Code mark:
No. 1 ring mark: 1T
No. 2 ring mark: 2T






3. Position the piston rings so that the ring ends are as shown.

NOTE: Do not align the piston ring ends.