Vauxhall Workshop Service and Repair Manuals

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

The crankshaft is removed.

  Install

Install crankshaft bearing cap with crankshaft bearing shell at cylinder block – tightening torque 50 Nm / 37 lbf. ft. + 45° + 15°. To check the crankshaft bearing play, bolt can be reused.

  Measure

The average crankshaft bearing diameter is determined using an inside micro-meter at points I, II and III and then calculated. Formula for calculating the average crankshaft bearing diameter: I + II + III   3 Example: I   54.972 mm   II   54.981 mm   III + 54.984 mm       164.937 mm divided by 3 = 54.979 mm The average crankshaft bearing diameter is 54.979 mm.

  Measure

The crankshaft journal diameter is measured with a micrometer at points I and II and then calculated. Formula for calculating the average crankshaft bearing journal diameter: I + II   2 Example:   I   54.962 mm   II + 54.964 mm       109.926 mm divided by 2 = 54.963 mm The average crankshaft journal diameter is 54.963 mm.

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

Permissible crankshaft bearing play: 0.015 to 0.041 mm.