Isuzu engine C22NE / 22LE / 20LE. Manual - part 20

6A-62 ENGINE MECHANICAL (C22NE, 22LE, 20LE)

Oil Pump Safety Valve

Removal

1.

Remove closure plug.

2.

Remove seal ring.

3.

Remove spring.

4.

Remove piston.

Installation

1.

Install piston (observe installation position).

2.

Install spring.

3.

Install seal ring.

4.

Install closure plug.

Tighten (Torque)

Closure plug - 30 N

⋅

m (3.0 kgf

⋅

m)

Oil Pump (Overhaul)

Removal

1.

Remove oil pump according to the corresponding
operation.

2.

Remove oil cover and pressure control valve.

Inspect

Clearance between gear pair and housing upper edge - see

“Technical Data”.

Check housing, cover and pressure control valve.

Installation

1.

Install pump cover with Sealing Compound 15 03 166 (90
094 714).

2.

Install oil pump safety valve according to the
corresponding operation.

3.

Install oil pump according to the corresponding operation.

ENGINE MECHANICAL (C22NE, 22LE, 20LE) 6A-63

OPERATIONS ON OIL CIRCULATION

Cylinder Head Safety Valve

Removal

1.

Remove cylinder head according to the corresponding
operation.

2.

Make hole in core plugs with pointed drift, turn in self
tapping screw and edge out.

Important!

Cover oil duct in cylinder head with piece of cloth.

3.

Pull out valve retainer, using commercially available tool.

4.

Remove ball and spring.

5.

Cut three threads in the ball seating with M 10 tap (3rd
stage).

6.

Coat tap with grease.

7.

Remove ball seating from cylinder head with
commercially available tool.
Do not damage cylinder head.

6A-64 ENGINE MECHANICAL (C22NE, 22LE, 20LE)

Installation

1.

Install new pressure valve into cylinder head - with
suitable pipe until stop.

2.

Install core hole plugs into cylinder head - with suitable
pipe to end of chamfer.

ENGINE MECHANICAL (C22NE, 22LE, 20LE) 6A-65

OPERATIONS ON COOLING SYSTEM

Caution!

Before working with the cooling system, be sure to confirm that

the temperature of the engine is cooled down.

Failure to observe this may cause burn.

Cooling System, Check for Leaks

Installation

1.

Install commercially available coolant checking
instrument onto compensation tank (Refer to section 6B;
Engine cooling).

2.

Check coolant level.

Inspection

Use 5-8840-0277-0 tester & 5-8840-2603-0 adaptor.

Cooling System, Fill Up and Bleed

Important!

Radiator and heater core are made from alminium.

To avoid corrosion, use only anti-freeze with corrosion

protection.

Replace Coolant

1.

Confirm the engine is cold enough.

2.

Open the radiator cap, pour coolant to the filler neck level
and close the cap.

3.

Pour coolant into the reservoir until MAX line is reached.

4.

Start the engine, run 2 

∼

 3 minutes at idling speed and

switch off the engine.

5.

Refill coolant if the coolant level is lowered.