For 1990-2009 cars

## Piston, Connecting Rod, and Bearing Cleaning and Inspection Plastigage Method

1. Remove the oil pan. Refer to 1401312 - Oil Pan, Remove and Install.
2. Remove the con-rod bearing cap.

• | Mark the installation position (1) of the con-rod bearing cap.

• | Unscrew the 2 bolts.

• | Degrease the con-rod bearing cap and wet the con-rod bearing clip with engine oil.

Note: Do not rotate the crankshaft.

Note: Plastigage is available via the "Opel/Vauxhall Workshop Equipment" catalogue.

3. Lay on Plastigage.

Lay Plastigage (flexible plastic thread) over the entire width of the con-rod bearing journal.

Caution: Refer to Fastener Caution in the Preface section.

4. Install the con-rod bearing cap. Tighten the 2 bolts to 35 N·m+45°+15°.
5. Remove the con-rod bearing cap.

Unscrew the 2 bolts.

Note: When reading the value, do not confuse millimeters and inches on the measuring scale.

6. Measure the con-rod bearing play.

• | Compare the width of the flattened plastic thread with the measuring scale.

• | Permissible con-rod bearing play: 0.019-0.071 mm.

Note: Check markings on parts.

7. Install the con-rod bearing cap.

• | Wet the con-rod bearing journal and con-rod bearing clips with engine oil.

• | Renew the bolts and tighten to 35 N·m+45°+15°.

8. Install the oil pan. Refer to 1401312 - Oil Pan, Remove and Install.

## Piston, Connecting Rod, and Bearing Cleaning and Inspection Measuring Device Method

1. Install the inner plunger and calibrate with the micrometer gauge (1).

Caution: Refer to Fastener Caution in the Preface section.

2. Mount the con-rod bearing cover on the con-rod. Tighten the 2 bolts to 35 N·m+45°+15°.
3. Measure the con-rod bearing diameters at 3 points.

Measure at points I, II and III with the internal measuring device.

4. Work out the average con-rod diameter.

Formula: I + II + III/3.

5. Measure the con-rod bearing journal diameter at 2 points.

Measure at points I and II with the micrometer gauge.

6. Work out the average con-rod bearing journal diameter.

Formula: I + II/2.

7. Determine the con-rod bearing play.

Calculation formula: average con-rod bearing diameter - average con-rod bearing journal diameter.

8. Perform the target/actual comparison.

Permissible con-rod bearing play: 0.019-0.071 mm.