Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1692

6A-66 ENGINE MECHANICAL (C24SE, C22NE, 22LE, 20LE)

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.

ENGINE MECHANICAL (C24SE, C22NE, 22LE, 20LE) 6A-67

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.

6A-68 ENGINE MECHANICAL (C24SE, C22NE, 22LE, 20LE)

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.

ENGINE MECHANICAL (C24SE, C22NE, 22LE, 20LE) 6A-69

Important!

Do not loosen or open the radiator cap when coolant is hot.
Doing so may cause hot water or steam to splash out, resulting
in burn. When opening the radiator cap, be sure to confirm the
coolant is cold. Cover a thick cloth over the cap and loosen it
slowly to reduce pressure, then open the cap.

6.

Close the radiator cap firmly and run the engine at
approx. 2000 rpm. In addition, set the heater temperature
adjuster to the max position to circulate coolant in the
heater conduit system.

7.

Confirm that the temperature gauge reads half or more of
full scale and that the thermostat is activated.
Then continue idling 5 minutes more and switch off the
engine, and allow it to cool.

8.

After the engine cools down, check the coolant level and
refill it if necessary. When the level is lowered extremely,
check the coolant conduit system and reservoir hose for
leak.

9.

Pour coolant into the reservoir to MAX level.

Refill Coolant

Important!

After closing the cooling system, let engine run warm until

thermostat opens (coolant approx. 92

°C/197.6F)

Inspection

Coolant level

Allow engine to cool. If necessary, refill coolant.

Check that cooling system self-bleeds during engine warming-

up phase.

Ignition Timing, Check

No Adjustment