## Engine Block

#### Crankshaft Main Bearing Replacement (cont'd)

7-7

Main Bearing Clearance Inspection (with micrometer)

1. Measure the crankshaft journal diameter.

1. Use a micrometer to measure the crankshaft journal diameter across points (''A – A'') and (''B – B'').
2. Use the micrometer to measure the crankshaft journal diameter at the two points (I and II).

Crankshaft journal diameter:

Standard (New):

Size mark

51.918 – 51.928 mm

(2.0440 – 2.0444 in.)

Size mark

51.928 – 51.938 mm

(2.0444 – 2.0448 in.)

Service limit:

Size mark

51.912 mm (2.0438 in.)

Size mark

51.922 mm (2.0442 in.)

1. Measure the main bearing inside diameter.

1. If the clearance between the measured bearing inside diameter and the crankshaft journal exceeds the specified limit, the bearing and/or the crankshaft must be replaced.

Crankshaft journal and bearing clearance:

Standard (New):

0.030 – 0.058 mm

(0.0012 – 0.0023 in.)

Service limit:

0.08 mm (0.003 in.)

Crankpin and Bearing Clearance Inspection (with plastigage)

1. Clean the crankshaft, the connecting rod, the bearing cap and the bearings.

1. Install the bearing to the connecting rod and the bearing cap.

   NOTE: Do not allow the crankshaft to move when installing the bearing cap.

1. Prevent the connecting rod from moving.

1. Attach the Plastigage to the crankpin. Apply engine oil to the Plastigage to keep it from falling.

1. Install the bearing cap and tighten it to the two steps specified torque.

   NOTE: Do not allow the connecting rod to move when installing and tightening the bearing cap.

1st step torque:

25 Nm (2.5 kgf/m, 18 lbf/ft)

2nd step:

100°

1. Remove the bearing cap.

1. Compare the width of the Plastigage attached to either the crankshaft or the bearing against the scale printed on the Plastigage container.

Crankpin and bearing clearance:

Standard (New):

0.025 – 0.058 mm

(0.0010 – 0.0023 in.)

Service limit:

0.1 mm (0.004 in.)

a a a