Connecting Rod Bearing
Connecting Rod Bearing Oil ClearanceStandard oil clearance:
Standard sized: 0.030 - 0.055 mm (0.0012 - 0.0022 inch)
GU/S 0.25: 0.031 - 0.071 mm (0.0012 - 0.0028 inch)
Maximum oil clearance: 0.010 mm (0.0039 inch)
If the oil clearance is greater than maximum, replace the bearings. If necessary, grind or replace the crankshaft.
NOTE: If using a standard bearing, replace with one having the same number as marked on the bearing cap. There are 3 sizes of standard bearings, marked "4", "5" and "6" accordingly.
REFERENCE:
Connecting rod big end inside diameter
Standard sized
Mark 4: 56.000 - 56.006 mm (2.2047 - 2.2050 inch)
Mark 5: 56.006 - 56.012 mm (2.2050 - 2.2052 inch)
Mark 6: 56.012 - 56.018 mm (2.2052 - 2.2054 inch)
U/S 0.25: 56.000 - 66.018 mm (2.2047 - 2.2054 inch)
Crankshaft crank pin diameter
Standard sized: 52.987 - 53.000 mm (2.0861 - 2.0866 inch)
U/S 0.25: 52.745 - 52.755 mm (2.0766 - 2.0770 inch)
Bearing center wall thickness
Standard sized
Mark 4: 1.482 - 1.485 mm (0.0583 - 0.0585 inch)
Mark 5: 1.485 - 1.488 mm (0.0585 - 0.0586 inch)
Mark 6: 1.488 - 1.491 mm (0.0586 - 0.0587 inch)
U/S 0.25: 1.601 - 1.607 mm (0.0630 - 0.0633 inch)