Vauxhall Workshop Service and Repair Manuals

Carefully lever out retaining ring (1) with screwdriver and press out piston pin.

Caution

Piston and piston pin are paired to each other and must not be mixed up.

  Measure

Before installing the piston, measure the piston installation play. Measure diameter of piston with commercially available micrometer, 7 mm (I) from lower edge of piston and offset by 90° from piston pin axis.

Determine value at the micrometer.

Insert appropriate insert and Gauge MKM-571-B into precision micrometer and use micrometer to set Gauge MKM-571-B to "0".

  Measure

Measure cylinder bore at bottom (3), centre (2) and top (1) alternating crosswise.

Piston installation play: with new engine: 0.031 to max. 0.063 mm; with used engine: up to max. 0.15 mm.

Caution

Note installation position of piston and con-rod.

Connect con-rods to pistons so that the pairing number is visible (1) and the arrow on the piston head points to the engine timing side.

  Install

Press piston pin into piston and con-rod.

  Install

Install new retaining rings (2).

Note:   Securing ring openings (arrow) are arranged opposite the recess in the eye of the piston pin.