Disassembling the piston and connecting rod [Toyota Dyna Y50]

1. Check the fit of the piston and piston pin by rocking the piston on the piston pin. If any movement (play) is felt, replace the piston and pin as a set.



2. Remove the compression piston rings using an expander.



Remove the upper and lower scrapers and the oil ring expander by hand.

Caution: Arrange the piston rings in the correct order.

3. Disconnect the connecting rod from the piston.



a) Remove the piston pin retaining rings.



b) Heat the piston to a temperature of approximately 60°C.



c) Press the pin out of the piston bosses using a hammer and a round brass punch of a suitable diameter.

Note: Arrange pistons, pins, rings, connecting rods and bearings in the proper order.