Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 550

6A – 38 ENGINE MECHANICAL

GENERAL DESCRIPTION

4JB1T

ENGINE MECHANICAL 6A – 39

4JA1TC

6A – 40 ENGINE MECHANICAL

F06L200022

The 4J series automotive diesel engine has SPECIAL DESIGNED combustion chambers in the piston. This design
provides superior fuel economy over a wide range of driving conditions.
The model 4JG2 diesel engine has swirl type combustion chambers.
Auto-thermatic pistons with cast steel struts are used to reduce thermal expansion and resulting engine noise when
the engine is cold.
Chrome plated dry type cylinder liners provide the highest durability.
The laminated steel sheet cylinder head gasket is very durable and, to increase the head gasket reliability.
The crankshaft has been tufftrided to provide a longer service life. Because the crankshaft is tufftrided, it cannot be
reground.
The 4JA1, 4JB1T, 4JA1T and 4JG2T engines are equipped with the VE-Type distributor injection pump.
The 4JA1TC, 4JH1TC are equipped with the electronic controlled fuel injection pump. The type of this pump is
VP44 in the product made from BOSCH
The 4JG2T, 4JB1T, 4JA1TC, 4JH1TC and 4JA1T engines are equipped with turbocharger.
The 4JA1TC engine is equipped with intercooler and EGR cooler.
The 4JH1TC engine is equipped with intercooler.

4JH1TC

ENGINE MECHANICAL 6A – 41

REMOVAL AND INSTALLATION

Read this Section carefully before performing any removal and installation procedure. This Section gives you
important points as well as the order of operation. Be sure that you understand everything in this Section before you
begin.

Important Operations – Removal

1. Carefully remove the piping, hoses, wiring harness

connectors, engine control cables, and control rods
from the engine.

2. Remove the clutch slave cylinder, the back up light

switch connector, and the speedometer cable from the
transmission.

Battery

1. Disconnect the battery cable

Q

and the grounding

cable

R

from the battery terminals.

2. Remove the battery clamp

S

.

Take care not to accidentally short the battery with the
spanner or some other tool.

3. Remove

the

battery.

4. Disconnect the battery cable at the starter motor and

the ground cable at the cylinder body.

Engine Hood

Apply setting marks to the engine hood

Q

and the engine

hood hinges

R

before removing the engine hood.

This will facilitate reinstallation of the engine hood to its
original position.

Fuel Filter and Water Separator

1. Pull the fuel hose from the fuel filter

Q

and the water

separator

R

.

2. Plug the fuel hose to prevent fuel leakage.
3. Remove the fuel filter and the water separator.