Volt

Crankshaft and Bearing Cleaning and Inspection

Special Tools

For equivalent regional tools, refer to Special Tools .

Note : Crankshaft attached with crankshaft bearing caps.

1. Install the GE-571-B gauge (1).

•	Install the holder on the front of the engine block.

•	Place the dial gauge 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 (0.0039-0.0080 in).

3. Remove the GE-571-B gauge.

Note: Crankshaft removed.

1. Insert the crankshaft in the engine block.
2. Install the GE-571-B gauge (1).

•	Attach holder to the engine block.

•	Place the dial gauge 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 (0.001 in).

4. Remove the GE-571-B gauge.

Note: 

•	Crankshaft removed.

•	Do not rotate the crankshaft.

1. Lay out plastigauge. Refer to electronic parts catalog to find the recommended plastigage.

Lay out plastigauge (flexible plastic thread) around the entire width of the crankshaft bearing journal (1).





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

2. Install the 4 lower crankshaft bearings (3) and the lower crankshaft thrust bearing (4).
3. Install the crankshaft bearing cap tie plate (2).
4. Install the 10 inner crankshaft bearing cap tie plate bolts (1).

Caution: Refer to Fastener Caution in the Preface section.




5. Tighten the 10 inner crankshaft bearing cap tie plate bolts in a sequence as shown and in the following order:

5.1.	Tighten the inner crankshaft bearing cap tie plate bolts to 25 N·m (18 lb ft).

5.2.	Tighten the inner crankshaft bearing cap tie plate bolts an additional 60°. Use EN-470-B wrench .

5.3.	Tighten the inner crankshaft bearing cap tie plate bolts an additional 15°. Use EN-470-B wrench .

6. Remove the crankshaft bearing cap tie plate bolts and the crankshaft bearing cap tie plate.




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

7. Measure the crankshaft bearing play.

•	Compare the width of the flattened plastic thread (arrow) to the measuring scale (1).

•	The crankshaft bearing play should be 0.007-0.031 mm (0.00028-0.00122 in).

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

1. Install and tighten the crankshaft bearing cap tie plate and the crankshaft bearings as shown above.



2. Measure the crankshaft bearing diameter at 3 points.

Measure in areas as shown (1) with an internal measuring device.

Calculate the average crankshaft bearing diameter.

Formula: 1. result + 2. result + 3. result / 3.




3. Measure the crankshaft bearing journal diameter at 2 points between (1) and (3) and between (2) and (4) with the micrometer gauge.
4. Calculate the average crankshaft bearing journal diameter.

Formula: 1. result + 2. result / 2.

5. Determine the crankshaft bearing play.

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

6. The crankshaft bearing play should be 0.007-0.031 mm (0.00028-0.00122 in).