Special Tools

MKM-571-B Dial Gage

For equivalent regional tools, refer to Special Tools.

Note: Crankshaft attached with crankshaft bearing covers.

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

•	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 gage .

Note: Crankshaft removed.

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

•	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 gage .

Note: Crankshaft removed.

Note: Do not rotate the crankshaft.

Note: 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).

Caution: Refer to Fastener Caution in the Preface section.

Note: Note the correct tightening sequence.

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

2. Install the crankshaft bearing cap. Tighten the 2 bolts to 50 N·m+45°+15°.
3. Remove the crankshaft bearing cap.

Unscrew the 2 bolts.

Note: 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.

Caution: Refer to Fastener Caution in the Preface section.





Note: Note the correct tightening sequence.

Note: 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 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.