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Crankshaft Bearing, Remove and Install > < Hub - Torsional Vibration Damper, Remove and Install

Crankshaft Bearing Clearance, Check (Determine Crankshaft Bearing Clearance Using External Micrometer and Inside Micrometer)

The crankshaft is removed.

  Install

Install crankshaft bearing cap with crankshaft bearing shell at cylinder block – tightening torque 25 Nm / 18 lbf. ft. + 50°. For checking the crankshaft bearing play, the bolts can be re-used.

  Measure

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

Formula for calculating the average con-rod bearing diameter:

I + II + III

 

3


Example:

I

 

57.972 mm

 

II

 

57.981 mm

 

III

+

57.984 mm

 

 

 

173.937 mm

divided by 3 = 57.979 mm


The average con-rod bearing diameter is 57.979 mm.

Object Number: 2387884  Size: DEFAULT

  Measure

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

Formula for calculating the average con-rod bearing diameter:

I + II

 

2


Example:

 

I

 

57.962 mm

 

II

+

57.964 mm

 

 

 

115.926 mm

divided by 2 = 57.963 mm


The average crankshaft journal diameter is 57.963 mm.

Object Number: 2387881  Size: DEFAULT

  Measure

The crankshaft clearance is calculated from the difference in diameter between the crankshaft bearing bore and crankshaft journal.

Example:

Average crankshaft bearing diameter

 

57.979 mm

Average crankshaft journal diameter

-

57.963 mm

 

 

0.016 mm


Permissible crankshaft bearing play: 0.02 to 0.058 mm. For selection of the bearing shells – see "Technical Data".


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Crankshaft Bearing, Remove and Install > < Hub - Torsional Vibration Damper, Remove and Install