Vauxhall Workshop Service and Repair Manuals

Con-rod Bearing Clearance, Check (Determine Bearing Clearance with Micrometer and Inside Micrometer)  

Notice: 

Con-rod and crankshaft are removed.  

  Install, Connect   

Install con-rod bearing cap with con-rod bearing shell to con-rod - Tightening torque - 35 Nm/26 lbf. ft. + 45 ° + 15 ° .   The bolts can be reused for checking the con-rod bearing clearance.     Measure    Formula for calculation of the average   I + II + III   con-rod bearing diameter:   3     Example:       I   42.738 mm     II   42.732 mm     III   + 42.741 mm       128.211 mm   ÷ 3 = 42.737 mm     The average con-rod bearing diameter is 42.737 mm.

  Measure   

The con-rod bearing journal diameter is measured with a micrometer at points I and II and then calculated.   Formula for calculation of the average   I + II   con-rod bearing journal diameter:   2     Example:       I   42.729 mm     II   + 42.725 mm       85.454 mm   ÷ 2 = 42.727 mm     The average con-rod bearing journal diameter is 42.727 mm. The con-rod bearing clearance is calculated from the difference in diameter between the con-rod bearing bore and the con-rod bearing journal.   Example:     Average con-rod bearing diameter   42.737 mm   Average con-rod bearing journal diameter   - 42.727 mm     0.010 mm     Permissible con-rod bearing clearance: 0.006 to 0.031 mm.