Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1213

6A–49

ENGINE MECHANICAL (Y22SE 2.2L)

Crankshaft

Crankshaft and Associated Parts

015R100024

Legend

(1) Cylinder Head Assembly
(2) Oil Pump Assembly
(3) Pan
(4) Pan Support
(5) Oil Strainer

(6) Balance Unit Assembly
(7) Piston and Connecting Rod Assembly
(8) Main Bearing Cap
(9) Crankshaft

(10) Cylinder Block Assembly

Disassembly

1. Remove cylinder head assembly (1). Refer to

“Cylinder head” in this manual.

2. Remove oil pan (3).

CAUTION: Take care not to damage or deform the
sealing flange surface of crankcase.

3. Remove oil pan support (4).

4. Remove oil strainer (5).
5. Remove oil pump assembly (2).
6. Balance unit assembly (6).
7. Remove piston and connecting rod assembly (7).

Refer to “Piston, Piston Ring and Connecting Rod” in
this manual.

8. Remove flywheel.
9. Remove rear oil seal and oil baffle plate.

6A–50

ENGINE MECHANICAL (Y22SE 2.2L)

10. Remove main bearing cap (8).

11. Remove crankshaft (9).

12. Remove crankshaft pulse pickup sensor disc.

Inspection and Repair for Bearing

1. Crankshaft

Set the dial indicator as shown in the illustration and
measure the crankshaft thrust clearance. If the thrust
clearance exceeds the specified limit, replace the
thrust bearings as a set.

Thrust Clearance
Standard : 0.01 mm–0.02 mm

(0.0004 in–0.0008 in)

Limit : 0.21 mm (0.0083 in)

014RW079

Main Bearing Clearance

1. Remove the bearing caps and measure the oil

clearance.

2. Remove the main bearing cap fixing bolts.

Arrange the removed main bearing caps in the
cylinder number order.
Remove the main bearings.

3. Remove the crankshaft.

Remove the main bearings.

4. Clean the upper and lower bearings as well as the

crankshaft main journal.

5. Check the bearings for damage or excessive wear.

The bearings must be replaced as a set if damage or
excessive wear is discovered during inspection.

6. Set the upper bearings and the thrust washers to their

original positions.
Carefully install the crankshaft.

7. Set the lower bearings to the bearing cap original

position.

8. Apply plastigage to the crankshaft journal unit as

shown in the illustration.

014RW055

9. Install main bearing caps, and tighten each bolt to the

specified torque.

Main bearing caps bolts.
Torque:
1st step: 50 N·m (37 lb ft)
2nd step: 45

°

10. Measure the plastigage width and determine the oil

clearance. If the oil clearance exceeds the specified
limit, replace the main bearings as a set and/or
replace the crankshaft.

Standard : 0.015 mm–0.04 mm

(0.0006 in–0.0016 in)

Limit : 0.12 mm (0.0047 in)

014RW077

11. Clean the plastigage from the bearings and the

crankshaft.
Remove the crankshaft and the bearings.

6A–51

ENGINE MECHANICAL (Y22SE 2.2L)

Crankshaft Inspection

Inspect the surface of the crankshaft journal and crank
pins for excessive wear and damage. Inspect the oil seal
fitting surfaces for excessive wear and damage. Inspect
the oil ports for obstructions.

Inspection and Repair for Crankshaft

1. Carefully set the crankshaft. Slowly rotate the

crankshaft and measure the runout. If the crankshaft
runout exceeds the specified limit, the crankshaft
must be replaced.

Runout : 0.03 mm (0.0012 in)

014RW078

2. Measure the diameter and the uneven wear of main

journal and crank pin. If the crankshaft wear exceeds
the specified limit, crankshaft must be replaced.

Main journal diameter

White color 57.974 to 57.981 mm
(2.2824 to 2.2871 in)

Green color 57.981 to 57.988 mm
(2.2871 to 2.2830 in)

Brown color 57.988 to 57.995 mm
(2.2830 to 2.2833 in)

Crank pin diameter

Standard (No color) 48.970 to 48.988 mm
(1.9279 to 1.9287 in)

Blue (U/S 0.25) 48.720 to 48.738 mm
(1.9181 to 1.9188 in)

White (U/S 0.5) 48.470 to 48.488 mm
(1.9083 to 1.9090 in)

015RS009

NOTE: Take average of several measurements at
different points.

6A–52

ENGINE MECHANICAL (Y22SE 2.2L)

Crankshaft Bearing Selection

When installing new crankshaft bearings or replacing
bearings, refer to the selection table below. Select and
install the new crankshaft bearings.

Crankshaft grinding dimensions

mm  (in)

Production and Service

Crankshaft bearing journal dia.

Standard size

white

57.974 to 57.981 (2.2824–2.2871)

green

57.981 to 57.988 (2.2871–2.2830)

brown

57.988 to 57.995 (2.2830–2.2833)

Undersize 0.25 (0.0098)

green/blue

57.731 to 57.738 (2.2729–2.2731)

brown/blue

57.738 to 57.745 (2.2731–2.2734)

Undersize 0.5 (0.0197)

green/white

57.481 to 57.488 (2.2630–2.2633)

brown/white

57.488 to 57.495 (2.2633–2.2636)

Guide bearing width

Standard size

25.950 to 26.002 (1.0217–1.0237)

Oversize 0.25 (0.0098)

26.200 to 26.252 (1.0315–1.0335)

Oversize 0.5 (0.0197)

26.450 to 26.502 (1.0413–1.0434)

NOTE: Take care to ensure the bearings are positioned
correctly.
Crankshaft pulse pickup sensor disc inspection and
repair.
Inspect the crankshaft pulse pickup sensor disc for
excessive wear and damage.
Replace the crankshaft pulse pickup sensor disc if the
inspection exceeds wear and damage.

015RW039

Reassembly

1. Crankshaft (12).

D

Install the crankshaft pulse pickup sensor disc.

Torque: 13 N·m (113 lb in)

D

Install the main bearings to the cylinder block and
the main bearing caps.

D

Be sure that they are positioned correctly.

D

Apply new engine oil to the upper and lower main
bearing faces.

NOTE: Do not apply engine oil to the main bearing back
faces.

D

Carefully mount the crankshaft.

D

Apply engine oil to the thrust washer.

D

Assemble the thrust washer to the No.3 bearing
journal. The oil grooves must face the crankshaft.

Apply the liquid gasket to rear bearing cap (In
grooves provided).

D

Tighten the crankshaft baring cap bolts in 2 steps:

1st step: 50 N·m (37 lb ft)

2nd step: 45

°

The new bolts must be used.