For 1990-2009 cars

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