Crankshaft Journal Diameter & Limits

Crankshaft Journal Diameters [1]:
Basic dimension:
Main 54.00 mm (2.1260 in.)
Connecting rod 47.80 mm (1.8819 in.)
1st undersize (0.25 mm)
Main 53.75 mm (2.1161 in.)
Connecting rod 47.55 mm (1.8720 in.)
2nd undersize (0.50 mm)
Main 53.50 mm (2.1063 in.)
Connecting rod 47.30 mm (1.8622 in.)
3rd undersize (0.75 mm)
Main 53.25 mm (2.0965 in.)
Connecting rod 47.05 mm (1.8524 in.)
Tolerance limits
Main Journal -0.017 mm to -0.042 mm (-0.00066 in. to -0.00165 in.)
Connecting Rod Journal -0.022 mm to -0.042 mm (-0.00087 in. to -0.00165 in.)
Crankshaft Main Bearing Radial Clearance:
New parts 0.02-0.06 mm (0.008-0.0024 in.)
Wear limit 0.17 mm (0.0067 in.)

Crankshaft Main Bearing Axial Clearance:
New parts 0.07-0.17 mm (0.0028-0.0067 in.)
Wear limit 0.25 mm (0.0098 in.)

Connecting Rod Radial Clearance [2]:
New 0.01-0.06 mm (0.0004-0.0024 in.)
Wear limit 0.12 mm (0.0047 in.)

Connecting Rod Axial Clearance:
New 0.05-0.31 mm (0.0020-0.0122 in.)
Wear limit 0.37 mm (0.0145 in.)


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[1]: The journal diameters given are nominal diameters and not actual measured dimensions. For example, the first table entry with basic journal diameter of 54.00 mm should actually measure between 53.978 mm and 53.958 mm, according to the tolerance limits (oil clearance).
[2]: When checking radial clearance, lubricate the contact surface of the nut before tightening. When checking, tighten the nut only to 30 Nm (22 ft lb).