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Identification Of Connecting Rod Bearing: Notes

Class Mark Thickness Of Bearing
E Blue 1.509 ~ 1.512 mm (0.0594 ~ 0.0595 in.)
D Black 1.506 ~ 1.509 mm (0.0592 ~ 0.0594 in.)
C Red 1.503 ~ 1.506 mm (0.0591 ~ 0.0592 in.)
B Green 1.500 ~ 1.503 mm (0.0590 ~ 0.0591 in.)
A Yellow 1.497 ~ 1.500 mm (0.0589 ~ 0.0590 in.)
  1. (11) Selection
      Connecting Rod Identification Mark
    0(a) 1(b) 2(c)
    Crankshaft Identification Mark  1 or A A (Yellow) B (Green) C (Red)
    2 or B B (Green) C (Red) D (Black)
    3 or C C (Red) D (Black) E (Blue)
  1. 3. Check the connecting rod.
    1. When reinstalling, check the cylinder numbers on the connecting rods and the caps. When installing a new connecting rod, the notches for bearing fixing on the connecting rods and caps should face the same direction.
    2. If one or both edge of the connecting rod thrust surface is damaged, replace the rod. If the inner surface of the rod is damaged or rough, also replace it.
    3. Using a connecting rod aligner, measure the bent or torsion of the rod. If the measurement is near the specification, adjust the rod with a press. If the rod is bent or twisted excessively, replace it.

      Allowable bend of connecting rod 

      0.05mm/100mm (0.0020in./3.9370in.)

      Allowable twist of connecting rod 

      0.1mm/100mm (0.0039in./3.9370in.)

      NOTE: When assembling the rod without a bearing, there should be no difference.