30. Piston and Connecting Rod Disassemble

Piston and Connecting Rod Disassemble




1. Remove the piston with con-rod. Refer to 1401300 - Piston with Con-rod, Remove and Install.

Important: Note installation position of the piston in respect of the con-rod.


2. Detach the piston from the con-rod.

* Remove the retainer (1) from the piston eye.
* Do not damage the bore.
* Press the piston pin (2) out of the piston.

3. Remove the piston rings using piston ring pliers (1).
Remove oil carbon from the groove with a split piston ring, filed to a wedge-shape.
4. Measure the piston ring gap.

* Tension the piston ring in the cylinder and measure the gap with a feeler gauge.
* Permissible ring gap:

- Rectangular compression ring (2): 0.20-0.40 mm
- Tapered compression ring (3): 0.40-0.60 mm
- Oil scraper ring (4): 0.25-0.75 mm




5. Check piston ring vertical play with a feeler gauge in the piston ring groove.
Permissible vertical play:

* Rectangular compression ring (1): 0.04-0.08 mm
* Tapered compression ring (2): 0.03-0.07 mm
* Oil scraper ring (3): 0.03-0.13 mm