vauxhall Workshop Repair Guides

Vauxhall Workshop Service and Repair Manuals

ABOUT US
Crankshaft End Play, Check > < Crankshaft Bearing Play, Check (with Plastigage)

Astra G

Crankshaft Bearing Play, Check (Determine Bearing Play with Micrometer and Internal Micrometer)

  Install

Mount cylinder block base plate on cylinder block with crankshaft bearing shells and tighten – tightening torque M8/25 Nm / 18.5 lbf. ft. + 60°, M6/10 Nm / 7.5 lbf. ft. + 60°. The old bolts can be used for checking the crankshaft bearing play.

  Measure

The average crankshaft bearing bore diameter is determined using a inside micrometer at points I, II and III and then calculated.

Formula for and example of calculating average crankshaft bearing bore diameter:

I

+

II

+

III

3

I

50.022 mm

 

+ II

50.018 mm

 

+ III

50.014 mm

 

 

150.054 mm

: 3 = 50.018 mm

 

The average crankshaft bearing bore diameter is 50.018 mm.

 Object Number: 2387884 Size: DEFAULT

The crankshaft bearing journal diameter is measured with a micrometer at points I and II.

Formula for and example of calculating average crankshaft journal diameter:

I

+

II

2

I

50.004 mm

 

+ II

49.998 mm

 

 

100.002 mm

: 2 = 50.001 mm (average bearing journal diameter)

 

The average crankshaft bearing journal diameter is 50.001 mm.

Determine the bearing play using the average crankshaft bearing bore diameter and the average crankshaft bearing journal diameter.

 

average crankshaft bearing bore diameter

50.018 mm

-

Average crankshaft journal diameter

50.001 mm

 

Bearing play

0.017 mm

In this example, the determined crankshaft bearing play is 0.017 mm.

Permissible crankshaft bearing play: 0.007 mm to 0.031 mm

 Object Number: 2387881 Size: DEFAULT

Related Literature Units
-
-

Crankshaft End Play, Check > < Crankshaft Bearing Play, Check (with Plastigage)