Checking crankshaft bearing clearance

The ā€˛Plastlgage" method Is a simple way of checking bearing clearance.

Plastlgage is available in three different sizes for measuring ranges from 0.025 to 0.230 mm.

Type

Color Measuring Range green 0.025 to 0.075 mm red 0.05 to 0.15 mm blue 0.10 to 0.23 mm

Checking radial clearance

1. Remove crankcase lower section.

2. Remove oil from bearing shell and bearing journal.

3. Place Plastigage having width of bearing on crankshaft journal in axial direction. Install crankcase lower section carefully and tighten to specified torque.

Note

Do not turn crankshaft while measuring.

4. Remove crankcase lower section. Read width of flattened Plastigage from measuring scale. Corresponding value on measuring scale equals the bearing clearance.

Play of new bearings: Wear limit:

Checking axial clearance

Use special tool VW 387 to check axial clearance.

Play of new bearings: 0.110 to 0.312 mm Wear limit: 0.40 mm

Checking crankshaft bearing clearance

Printed in Germany - IV, 1992

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