For 1990-2009 cars

#### Special Tools

MKM-571-B Dial Gage

### Crankshaft End Play, Check

Important: Crankshaft attached with crankshaft bearing covers.

1. Install the dial gage MKM-571-B .

• | Install in the holder on the front of the cylinder block.

• | Place the dial gage plunger against the crankshaft and adjust.

2. Measure the longitudinal play of the crankshaft.

• | Move the crankshaft in the longitudinal direction.

• | Permissible crankshaft end play: 0.100-0.202 mm.

3. Remove the dial gage MKM-571-B .

### Crankshaft Out-of-Round, Check

Important: Crankshaft removed.

1. Insert the crankshaft in the cylinder block.
2. Install the dial gage MKM-571-B .

• | Attach to the bracket on the cylinder block.

• | Place the dial gage plunger against the crankshaft bearing journal and adjust.

3. Check the rotational play of the crankshaft.

• | Turn the crankshaft evenly.

• | Maximum permissible rotational play: 0.03 mm.

4. Remove the dial gage MKM-571-B .

### Check Crankshaft Bearing Clearance (With Plastigage)

Important: Crankshaft removed.

Important: Do not rotate the crankshaft.

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

1. Lay on Plastigage.

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

Notice: Refer to Fastener Notice in the Preface section.

Important: Note the correct tightening sequence.

Important: The bolts can be reused for checking the crankshaft bearing play.

2. Install the crankshaft bearing cap.

Tighten
Tighten the 2 bolts to 50 N·m+45°+15°.

3. Remove the crankshaft bearing cap.

Unscrew the 2 bolts.

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

4. Measure the crankshaft bearing play.

• | Compare the width of the flattened plastic thread (arrow) to the measuring scale.

• | Permissible crankshaft bearing play: 0.005-0.059 mm.

### Check Crankshaft Bearing Clearance (With Micrometer Gage Internal Measuring Device)

Notice: Refer to Fastener Notice in the Preface section.

Important: Note the correct tightening sequence.

Important: The bolts can be reused for checking the crankshaft bearing play.

1. Install the crankshaft bearing cap with the crankshaft bearing clips to the cylinder block.

Tighten
Tighten the 2 bolts to 50 N·m+45°+15°.

2. Install the inner plunger and calibrate with the micrometer gage (1).
3. Measure the crankshaft bearing diameter at 3 points.

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

4. Work the out average crankshaft bearing diameter.

Formula: I + II + III/3.

5. Measure the crankshaft bearing journal diameter at 2 points.

Measure at points I and II with the micrometer gauge.

6. Work out the average crankshaft bearing journal diameter.

Formula: I + II/2.

7. Determine the crankshaft bearing play.

Calculation formula: average crankshaft bearing diameter - average crankshaft bearing journal diameter.

8. Nominal-Actual comparison.

Permissible crankshaft bearing play: 0.005-0.059 mm.