Part 3

ENGINE UNIT

COMPONENTS (Part 1):

COMPONENTS (Part 2):

COMPONENTS (Part 3):

COMPONENTS (Part 4):

COMPONENTS (Part 5):

COMPONENTS (Part 6):

COMPONENTS (Part 7):

COMPONENTS (Part 8):

INSPECTION(continued)

41. INSPECT CRANKSHAFT OIL CLEARANCE

HINT: There are 2 types of main bearings with different widths (19.0 mm (0.748 inch) and 22.4 mm (0.882 inch)) for use in the inspection. Install the 22.4 mm (0.882 inch) bearings in the No. 1 and No. 4 cylinder block journal positions with the main bearing cap. Install the 19.0 mm (0.748 inch)bearings in the No. 2 and No. 3 positions.

(a) Clean each main journal and bearing.

(b) Install the 4 upper bearings.
(1) Install the upper bearing near the center of the cylinder block.

NOTICE:
^ The width of the No. 1 and No. 4 journal bearings is different from that of the No. 2 and No. 3 journal bearings. Therefore, confirm whether it is the correct journal bearing prior to installation.
^ Do not apply engine oil to the bearing installation surfaces of the cylinder block and the back side of the bearings.
^ Check that the oil groove on the cylinder block can be seen through the oil supply holes of the upper bearing.

(c) Install the 4 lower bearings.
(1) Install the lower bearing near the center of the cylinder block.

NOTICE: Do not apply engine oil to the bearing and its contact surface.

HINT: A number marked on each main bearing cap indicates the installation position.

(d) Place the crankshaft on the cylinder block.

(e) Lay a strip of Plastigage across each journal.

(f) Examine the front marks and numbers, check the sequence order is as shown and install the bearing caps onto the cylinder block.
(g) Apply a light coat of engine oil to the threads of bearing cap bolts.
(h) Temporarily install the 8 main bearing cap bolts in the inside positions.

(i) Install the main bearing caps. Tighten the 2 bolts for each bearing cap until the clearance between the bearing cap and the cylinder block is under 6 mm (0.23 inch).

(j) Using a plastic-faced hammer, lightly tap the bearing cap to ensure a proper fit.
(k) Apply a light coat of engine oil to the threads of main bearing cap bolts.

(l) Install the 16 main bearing cap bolts. Using several steps, tighten the bolts uniformly in the sequence shown in the illustration.
Torque: 61 Nm (622 kgf-cm, 45 ft. lbs.)

(m) Mark the front side of the bearing cap bolts with paint.
(n) Retighten the bearing cap bolts 90° in the sequence as shown.
(o) Check that the painted mark is now at a 90° angle from the front.

NOTICE: Do not turn the crankshaft.

(p) Install the 8 main bearing cap bolts. Using several steps, tighten the bolts uniformly in the sequence shown in the illustration.
Torque: 25 Nm (255 kgf-cm, 18 ft. lbs.)
(q) Remove the main bearing caps.

(r) Measure the Plastigage at its widest point.
Standard oil clearance: 0.018 to 0.030 mm (0.0007 to 0.0012 inch)
Maximum clearance: 0.046 mm (0.0018 inch)
If the oil clearance is greater than the maximum, replace the bearings. If necessary, replace the crankshaft.

NOTICE: Completely remove the Plastigage.

(s) Replace the bearing with 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 for the appropriate bearing number. There are 5 size of standard bearings, marked "1", "2", "3", "4" and "5" accordingly.

Journal Bearing:

HINT:
EXAMPLE
Cylinder block "11" (A) + Crankshaft "06" (B)
= Total number 17 (Use bearing "3")