Chevrolet Sonic Repair Manual: Crankshaft and Bearing Cleaning and Inspection
Special Tools
- EN-45059 Torque Angle Sensor Kit
- GE-571-B Dial Gauge
For equivalent regional tools, refer to Special Tools.
- Crankshaft End Play, Check
-
Note:
Crankshaft attached with crankshaft bearing caps.
- Install the GE-571-B gauge (1).
- Install in the holder on the front of the engine block.
- Place the dial gauge plunger against the crankshaft and adjust.
- Measure the longitudinal play of the crankshaft.
- Move the crankshaft in the longitudinal direction.
- Permissible crankshaft end play: 0.100?E.202 mm (0.0039?E.0080 in)
- Remove the GE-571-B gauge .
- Crankshaft Out-of-Round, Check
-
Note:
Crankshaft removed.
- Insert the crankshaft in the engine block.
- Install the GE-571-B gauge .
- Attach to the bracket on the engine block.
- Place the dial gauge plunger against the crankshaft bearing journal
and adjust.
- Check the rotational play of the crankshaft.
- Turn the crankshaft evenly.
- Maximum permissible rotational play: 0.03 mm (0.001 in).
- Remove the GE-571-B gauge (1).
- Check Crankshaft Bearing Clearance (With Plastigage)
-
Note:
- Crankshaft removed.
- Do not rotate the crankshaft.
- Lay on plastigage.
Lay out plastigage (flexible plastic thread) around the entire width
of the con-rod bearing journal (1).
Caution:
Refer to Fastener Caution.
Note:
- Note the correct tightening sequence.
- The bolts can be reused for checking the crankshaft bearing
play.
- Install the crankshaft bearing cap. Tighten the 2 crankshaft bearing
cap bolts in 3 passes. Use the EN-45059 sensor kit :
- First pass to 50 Y (37 lb ft)
- Second pass to 45°
- Third pass to 15°
- Remove the 2 crankshaft bearing cap bolts.
Note:
When reading the value, do not confuse millimeters and
inches on the measuring scale (1).
- Measure the crankshaft bearing play.
- Compare the width of the flattened plastic thread (arrow) to the
measuring scale.
- Permissible crankshaft bearing play: 0.005?E.059 mm (0.0002?E.0023 in).
- Check Crankshaft Bearing Clearance (With Micrometer Gauge Internal Measuring
Device)
-
Note:
- Note the correct tightening sequence.
- The bolts can be reused for checking the crankshaft bearing
play.
- Install the crankshaft bearing cap with the crankshaft bearing clips
to the cylinder block.
Tighten the 2 crankshaft bearing cap bolts in 3 passes. Use the EN-45059
sensor kit :
- First pass to 50 Y (37 lb ft)
- Second pass to 45°
- Third pass to 15°
- Install the inner plunger and calibrate with the micrometer gauge (1).
- Measure the crankshaft bearing diameter at 3 points.
- Measure at points A, B and C with the internal measuring device.
- Calculate the average crankshaft bearing diameter.
- Formula: A + B + C /3.
- Measure the crankshaft bearing journal diameter at 2 points.
Measure at points I and II with the micrometer gauge.
- Calculate the average crankshaft bearing journal diameter.
Formula: I + II/2.
- Determine the crankshaft bearing play.
Calculation formula: average crankshaft bearing diameter minus average crankshaft
bearing journal diameter.
- Nominal-Actual comparison.
Permissible crankshaft bearing play: 0.005?E.059 mm (0.0002?E.0023 in).
Note: The crankshaft position sensor system variation learn procedure
is required when the following service procedures have been performed, regardless
of whether DTC P0315 is set:
...
Special Tools
EN-45059 Torque Angle Sensor Kit
For equivalent regional tools, refer to Special Tools
Note: Inspect the installation position.
Install the crankshaft bearing cl ...
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