Crankshaft Main Bearing

Crankshaft Main Bearing Cap Bolts

Inspection
Measure the minimum diameter of the elongated thread at the measuring point





Standard diameter
Bolt A 10.8 to 11.0 mm (0.425 to 0.433 in.)
Bolt B 9.8 to 10.0 mm (0.386 to 0.394 in.)
Minimum diameter
Bolt A 10.7 mm (0.421 in.)
Bolt B 9.7 mm (0.382 in.)
Measuring point 47 mm (1.85 in.)
If the diameter is less than the minimum, replace the bolt

Tightening Sequence
Step 1:
Install and uniformly tighten the 20 main bearing cap bolts in sequence





Torque 61 Nm (622 kgf-cm, 45 ft-lbf) for inside position
Torque 27 Nm (275 kgf-cm, 20 ft-lbf) for outside position

If any of the main bearing cap bolts does not meet the specified torque, replace it

Step 2:
Tighten the bearing cap bolts another 90° in the order shown in step 1
Install and uniformly tighten the 10 main bearing cap bolts and 10 seal washers in several steps, in sequence





Torque 45 Nm (459 kgf-cm, 33 ft-lbf)

Main Bearing Oil Clearances

Standard





Maximum





If the oil clearance is greater than the maximum, replace the bearings. If necessary, replace the crankshaft

If replacing a bearing, replace it with one having the same number. If the number of the bearing cannot be determined, select the correct bearing by adding together the numbers imprinted on the cylinder block and crankshaft. Refer to the table below for the appropriate bearing number. There are 6 sizes of standard bearings. For No. 1 and No. 5 position bearings, use bearings marked 4, 5, 6, 7, 8 and 9. For other position bearings, use bearing marked 3, 4, 5, 6, 7 and 8





Example:
Cylinder block "07" + Crankshaft "06" = Total number 13 (Use upper bearing "6" and lower bearing "7")

Standard Crankshaft Main Journal Diameter





Standard Bearing Center Wall Thickness for No. 1 and No. 5 Journals





Standard Bearing Center Wall Thickness for Other Journals