Isuzu engine C22NE / 22LE / 20LE. Service manual - part 18

6A-54 ENGINE MECHANICAL (C22NE, 22LE, 20LE)

Installation

1.

Install piston with con-rod by inserting with engine oil.

2.

Coat piston rings with engine oil and compress with
piston ring compressor.

Important!

Installation position:

Arrow / notch on piston head on timing side of engine

Beads on con-rod on clutch side

Torque-Angle Method

Piston to cylinder block.

Con-rod bearing cap to con-rod-35N

⋅

m (3.5 kgf

⋅

m) +45

°

 to 60

°

Important!

Use new bolts.

Installation

1.

Install oil pan and cylinder head according to the
corresponding operations.

2.

Install sealing Gasket or replace if damaged.

3.

Install camshaft housing to cylinder head.

4.

Install cylinder head according to the corresponding
operation.

Con-Rod

Removal

1.

Remove piston with con-rod according to the
corresponding operation.

2.

Disassemble con-rod piston assembly by pressing out
piston pin, using 5-8840-0468-0.

Installation

1.

Slide guide drift (5-8840-0468-0) in horizontal position
through piston and con-rod as far as side plate stops.

2.

Tighten bolts evenly so that the piston rests flush on the
rear plate.

3.

Remove centre piece from guide drift and insert piston
bolts (lubricated) into guide drift.

ENGINE MECHANICAL (C22NE, 22LE, 20LE) 6A-55

4.

Heat a new con-rod to 280

°

C in the oil bath.

5.

Install the con-rod to the piston and insert the piston pin.

Important!

Since the con-rods have no weight balancing studs, re-working

is not possible.

Exchange con-rods in sets only.

Installation position, beads on con-rod point to the flattening on

the piston pin eye.

Firmly seated piston pin cannot be pushed in. Carry out

installation quickly.

Piston Rings

Removal

1.

Remove piston with con-rod according to the
corresponding operation.

2.

Remove piston rings using commercially available ring
installer or piston ring clamp pliers.

Clean

Piston ring grooves - ground piece of old piston ring

Inspection

Piston ring gap

For piston ring sizes, permissible piston ring gaps - see

"Technical Data"

6A-56 ENGINE MECHANICAL (C22NE, 22LE, 20LE)

Installation

1.

Install oil scraper ring.

2.

Offset ring gaps of steel band rings each 25 to 50 mm/1
to 2in. to the left or right of the intermediate ring gap.

3.

Install piston rings.

4.

Offset ring gaps by approx. 180

°

.

5.

Install second piston ring with identification mark "TOP"
facing upwards.

6.

Install piston with con-rod according to the corresponding
operation.

ENGINE MECHANICAL (C22NE, 22LE, 20LE) 6A-57

OPERATIONS ON REMOVED ENGINE

Crankshaft

Removal

1.

Mount the engine on an engine overhaul stand with
appropriate adapters.

2.

Remove the aggregates, flywheel/drive disc, oil pan, and
oil pump according to the corresponding operation.

3.

Mark the con-rod bearing cover.

4.

Remove the crankshaft bearing cover.

5.

Remove the crankshaft from cylinder block.

Inspection

Remove and install all parts if necessary

Crankshaft pulse pickup sensor rotor inspection and repair.
Inspect the crankshaft pulse pickup sensor rotor for excessive
wear and damage.
Replace the crankshaft pulse pickup rotor if the inspection
results exceed wear and damage limits.

Installation

1.

Install the crankshaft pulse pickup sensor.
Torque: 13N

m (1.3 kgf

m)

2.

Install new bearing shells into the cylinder block and
bearing cover.

3.

Coat the bearing shafts with engine oil.
For oversizes-see “Technical Data”

4.

Install a new crankshaft into the cylinder block.

Note

The sealing of the crankshaft can be corrected with light

blows with a rubber hammer on the crank arm (arrowed).