Isuzu engine C22NE / 22LE / 20LE. Service manual — part 11

6A-26 ENGINE MECHANICAL (C22NE, 22LE, 20LE)

Toothed Belt, Replace
(Engine with toothed belt tension
roller)

Removal

1.

Remove the belts on the bracket for alternator.

2.

Remove the fan.

3.

Remove the V-belt for power steering.

4.

Remove the V-belt for A/C.

5.

Remove the fan belt.

6.

Remove the fan shroud.

7.

Remove the crankshaft pulley while counterholding on
the fastening bolt of toothed belt drive gear.

8.

Remove the toothed belt from cover.

Adjust

Turn the crankshaft in the engine rotational direction to
mark(2).
Align markings on toothed belt and on toothed belt rear cover.
Simultaneously, notch (1) on camshaft gear must align with the
mark on toothed belt rear cover.
Turn the crankshaft slowly and smoothly.

ENGINE MECHANICAL (C22NE, 22LE, 20LE) 6A-27

Adjust

Loosen the fastening bolt of the toothed belt tension roller and
turn the adjustment eccentric in the direction of arrow
(clockwise) until pointer (1) comes to the left stop.
Remove the toothed belt.

Installation

1. Install a new toothed belt while keeping tension side taut.

Adjust

Toothed belt tension - see operation " Toothed Belt Tension".

2.

Install the toothed belt to the cover.

3.

Install the crankshaft pulley while counterholding on the
fastening bolt of toothed belt drive gear.

4.

Install the fan shroud.

5.

Install the fan belt.

6.

Install the V-belt for A/C.

7.

Install the V-belt for power steering.

8.

Install the fan.

9.

Install the belts to the bracket for alternator.

6A-28 ENGINE MECHANICAL (C22NE, 22LE, 20LE)

OPERATIONS ON INSTALLED ENGINE

SEALING OPERATIONS

Gasket, Exhaust Manifold, Cylinder Head

Removal

1.

Remove front exhaust pipe from exhaust manifold.

2.

Remove exhaust manifold heat shield.

3.

Remove exhaust manifold retaining nut.

4.

Remove exhaust manifold from cylinder head.

Clean

Sealing surfaces.

Tighten (Torque)

Exhaust manifold to cylinder head - 22 N

⋅

m (2.2 kgf

⋅

m)

Front exhaust pipe to exhaust manifold - 25 N

⋅

m (2.6 kgf

⋅

m)

Gasket, Intake Manifold, Cylinder Head

Removal

1.

Remove air intake hose.

2.

Remove drive belt for alternator.

3.

Remove bolt clamping bracket for alternator from intake
manifold.

4.

Remove intake manifold from cylinder head.

Clean

Sealing surfaces

Tighten (Torque)

Intake manifold to cylinder head - 22 N

⋅

m (2.2 kgf

⋅

m)

Clamping bracket for alternator to intake manifold - 25 N

⋅

m (2.5

kgf

⋅

m)

Installation

1.

Install V-belt according to the corresponding operation.

2.

Install air intake hose.

ENGINE MECHANICAL (C22NE, 22LE, 20LE) 6A-29

Seal Ring, Camshaft Housing, Timing Side

Removal

1.

Remove front toothed belt cover toothed belt from
camshaft timing gear according to the corresponding
operation.

2.

Remove camshaft housing cover and camshaft timing
gear.

3.

Remove sealing ring by making hole in middle of ring,
turning in self-tapping screw and edging out.

Installation

1.

Install sealing ring by using 5-8840-0451-0 with camshaft
sprocket bolt and washer.

2.

Install coat seal lips of shaft seal ring slightly.

Seal Ring, Thermostat Housing, Cylinder Head

Removal

1.

Open radiator drain tap and collect coolant.

2.

Remove toothed belt rear cover and toothed belt
according to the corresponding operation.

3.

Remove camshaft housing cover.

4.

Remove camshaft timing gear by counterholding
camshaft with a flat spanner.

5.

Remove cable from temperature sensor.

6.

Remove upper inner hex bolts of rear toothed belt cover.

7.

Turn rear toothed belt cover to one side.

8.

Remove thermostat housing.

9.

Remove sealing ring from cylinder head.

Clean

Sealing surfaces in cylinder head and thermostat housing.

Installation

1.

Install sealing ring in recess of cylinder head.