Crankshaft Main Bearing

SERVICE SPECIFICATIONS





Standard oil clearance:





Maximum clearance:

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





HINT: If using 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, then refer to the table below for the appropriate bearing number. The No. 1 and No. 4 journal bearings have 5 standard bearing sizes, marked "3", "4", "5", "6" and "7" accordingly. The No.2 and No.3 journal bearings have 5 standard bearing sizes, marked "1", "2", "3", "4" and "5" accordingly.





No.1 and No.4 journal bearings





No.1 and No.4 journal standard bearings selection chart





No.2 and No.3 journal bearings





No.2 and No.3 journal standard bearings selection chart





Reference


TIGHTENING SPECIFICATIONS

INSTALL 12 POINTED HEAD MAIN BEARING CAP BOLTS

HINT:
^ The main bearing cap bolts are tightened in 2 progressive steps (steps (b) and (d)).
^ If any of the main bearing cap bolts is broken or deformed, replace it.

a. Apply a light coat of engine oil on the threads and under the main bearing cap bolts.





b. Install and uniformly tighten the 16 main bearing cap bolts, in several passes, in the sequence shown.
Torque: 22 Nm (225 kgf-cm, 16 ft. lbs.)
If any of the main bearing cap bolts does not meet the torque specification, replace the main bearing cap bolt.





c. Mark the front of the main bearing cap bolts with paint.
d. Retighten the main bearing cap bolts by 90° in the numerical order shown.
e. Check that the painted mark is now at a 90° angle to the front.





INSTALL HEXAGON HEAD MAIN BEARING CAP BOLTS
a. Install a new seal washer to the main bearing cap bolt.
b. Install and uniformly tighten the 8 main bearing cap bolts, in several passes, in the sequence shown.
Torque: 27 Nm (275 kgf-cm, 20 ft. lbs.)
c. Check that the crankshaft turns smoothly.