Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1214

6A–53

ENGINE MECHANICAL (Y22SE 2.2L)

2. Rear oil seal (10).

D

Coat lip of seal rings thinly with protective grease.

D

Install seal ring into cylinder block, use J–42616 (1)
and J–42613 (2).

015RW009

3. Flywheel (9).

1. Thoroughly clean and remove the oil from the

threads of crankshaft.

2. Remove the oil from the crankshaft and flywheel

mounting faces.

3. Mount the flywheel on the crankshaft and then

install the washer.

4. Use stopper (J–42618) to hold the flywheel for

prevent from rotating.

015RW010

5. Tighten the flywheel bolts in 2 steps:

1st step: 65 N·m (48 lb ft)

2nd step: 30

°

 – 45

°

NOTE: Do not reuse the bolt.

6. Piston and connecting rod assembly.

D

Apply engine oil to the cylinder bores, the
connecting rod bearings and the crankshaft
pins. Check to see that the piston ring end gaps
are correctly positioned.

D

Piston rings position (A) every 180

°

.

Oil scraper rings (B) — offset 25 to 50 mm (1 to 2 in).
to left and right from gap of intermediate ring.

015R100025

D

Insert the piston/connecting rod assemblies
into each cylinder with the piston ring
compressor. The front marks (1) must be facing
the front of the engine.

D

Match the numbered caps with the numbers on
the connecting rods. Align the punched marks
on the connecting rods and caps.

D

Dot (1) on piston head points to engine timing
side, bead on connecting rod points to flywheel
side.

015R100026

6A–54

ENGINE MECHANICAL (Y22SE 2.2L)

D

Tighten the connecting bearing cap bolts in 2
steps:

1st step: 35 N·m (26 lb ft)

2nd step: 45

°

New bolts must be used.

7. Install the balance unit assembly and tighten the

bolts in 2 steps:

1st step: 20 N·m (14 lb ft)
2nd step: 45

°

Refer to the “Balance Unit Assembly” section of
this manual.

8. Install oil pump assembly, refer to “Oil Pump” in

this manual.

9. Install oil strainer.

Torque: 8 N·m (69 lb in)

Ensure thread locking compound (Locktite) is
used.

10. Install oil pan support and tighten the bolts to the

specified torque.
Clean sealing surface before assembly, and ap-
ply four beads of sealant as shown.

Torque: 20 N·m (14 lb ft)

013R100003

11. Install oil pan.

Tighten the oil pan bolts.

Torque: 8 N·m (69 lb in)

12. Install cylinder head assembly, refer to “Cylinder

Head” in this manual.

6A–55

ENGINE MECHANICAL (Y22SE 2.2L)

Piston and Connecting Rod

Piston, Connecting Rod and Associate Parts

015R100032

Legend

(1) Cylinder Head Assembly
(2) Cylinder Head Gasket
(3) Oil Pan Assembly
(4) Pan Support
(5) Oil Strainer
(6) Balance Unit Assembly

(7) Connecting Rod Assembly
(8) Piston Ring
(9) Piston Pin

(10) Piston

(11) Connecting Rod

(12) Connecting Rod Cap

Disassembly

1. Remove cylinder head assembly (1), refer to

“Cylinder Head Assembly” in this manual.

2. Remove cylinder head gasket (2).
3. Remove oil pan assembly (3) and oil pan support (4).
4. Remove oil strainer.
5. Remove balance unit assembly.

6A–56

ENGINE MECHANICAL (Y22SE 2.2L)

6. Remove connecting rod cap with connecting rod

lower bearing.

7. Remove piston and connecting rod assembly.

NOTE: Before removing piston and connecting rod
assembly, measure thrust clearance.

D

Remove any ridge or carbon build up from the top
end of the cylinder.

8. Remove the piston rings with a piston ring expander

(1). Arrange the removed piston rings in the cylinder
number order.

015R100031

NOTE: Keep the parts removed from each cylinder
separate.  All parts must be reinstalled in their original
positions.

Inspection and Repair

Pistons

Carefully clean away all the carbon adhering to the piston
head and the piston ring grooves.

NOTE: Never use a wire brush to clean the pistons.
Damage will result. Visually check each piston for
cracking, scoring, and other signs of excessive wear. If
any of the above conditions are found, the piston must be
replaced.

Grade
number

Piston out side diameter

99

85.970 – 85.980 mm

(3.3846 – 3.3850 in)

00

85.990 – 86.470 mm

(3.3854 – 3.4043 in)

O/S 0.5

86.470 – 86.490 mm

(3.4043 – 3.4051 in)

Piston Rings

Any worn or damaged part discovered during engine
overhaul must be replaced with a new one.

1. Ring end gap measurement

D

Insert the piston ring into the bore.

D

Push the ring by the piston, at a right angle to the
wall, into the point at which the cylinder bore
diameter is the smallest.

D

Measure the ring end gap.

Compression Ring

1st ring

Standard:

0.20 mm–0.35 mm

(0.0079 in–0.0138 in)

2nd ring

Standard:

0.30 mm–0.50 mm

(0.0118 in–0.0197 in)

Oil ring

Standard:

0.25 mm–0.76 mm

(0.0098 in–0.0299 in)

2. Measure the clearance between the piston ring

groove and the piston ring with a feeler gauge. If the
piston ring groove / piston ring clearance exceeds the
specified limit, the piston must be replaced.

Compression Ring Clearance (1st and 2nd):

0.02 mm–0.04 mm

(0.0008 in.–0.0016 in)

Oil Ring Clearance:

0.01 mm–0.03 mm

(0.0004 in.–0.0012 in)

015R100028