Crankshaft Main Bearing

Crankshaft Main Bearing

Crank case bolt No.1* (a)
Tightening torque: (50 Nm -> 0 Nm -> 20 Nm -> 35 Nm -> 40° -> 40° (5.1 kgf-m -> 0 kgf-m -> 2.0 kgf-m -> 3.6 kgf-m -> 40° -> 40°, 37.0 lbf-ft -> 0 lbf-ft -> 15.0 lbf-ft -> 26.0 lbf-ft -> 40° -> 40°))


Install lower crank case to cylinder block and tighten crank case bolt No.1s according to the following procedure.

NOTE:
- If crank case bolt No.1s are reused, check them for deformation referring to "Crank Case Bolt No.1 Inspection" under Main Bearing Inspection Main Bearing Inspection.
- Use 12-point socket wrench to crank case bolt No.1s.

a) Apply engine oil to bolt threads and seats of crank case bolt No.1 and tighten bolt to 50 Nm (5.1 kgf-m, 37.0 lbf-ft) in numerical order ("1" - "10") evenly and gradually.
b) Loosen all bolts in reverse numerical order until loosening torque becomes 0.
c) In the same manner as Step a), retighten them to 20 Nm (2.0 kgf-m, 15.0 lbf-ft).
d) In the same manner as Step a), retighten them to 35 Nm (3.6 kgf-m, 26.0 lbf-ft).
e) In the same manner as Step a), retighten them to 40°.
f) In the same manner as Step a), retighten them to 40°.






Crank case bolt No.2* (a)
Tightening torque: 25 Nm (2.5 kgf-m, 18.5 lbf-ft)

Tighten crank case bolt No.2s in numerical order ("1" - "12") evenly and gradually.








Main bearing clearance
Standard: 0.022 - 0.034 mm (0.00087 - 0.00133 in.)
Limit: 0.050 mm (0.00196 in.)





Crankshaft journal diameter





Standard size crankshaft main bearing thickness














Main bearing cross - reference selection table (standard size)





Undersize of crankshaft main bearing thickness














Finished crankshaft journal diameter 51.732 - 51.750 mm (2.03670 - 2.03740 in.)

Main bearing cross - reference table (under size)