Isuzu N-Series. Service manual - part 470

6F-6 EXHAUST

TURBOCHARGER 6G-1

ENGINE 4H SERIES

SECTION 6G

TURBOCHARGER

Contents

GENERAL DESCRIPTION ...................................6G-2
ON-VEHICLE SERVICE .......................................6G-3

Charge Air Pipe .................................................6G-3
Intake Manifold ..................................................6G-3
Turbocharger .....................................................6G-4
Inspection and Repair........................................6G-5
Exhaust Manifold ...............................................6G-8
Turbocharger Turbine Housing Replacement (For 
4HG1-T Model)..................................................6G-8
Charge Air Cooler............................................6G-12

6G-2 TURBOCHARGER

GENERAL DESCRIPTION

Turbocharger

Garrett turbocharger components are constituted the
Center Housing and Rotating Assembly (CHRA), the
compressor housing, and the turbine housing.
Rotating parts include the turbine shaft, the compressor
wheel, the shaft bearings, the thrust bearings and the oil
seal rings. These parts are supported by the center
housing.
The turbocharger bearing and turbine shaft are lubricat-
ed with engine oil and at the same time are cooled with
engine coolant to improve their durability.
The turbocharger increase air intake efficiency, the re-
sults in increased engine power, reduced fuel consump-
tion and minimal engine noise.
Turbocharger rotating parts operate at very high speeds
and temperatures. The parts materials have been care-
fully selected and machined to extremely high precision.
The turbocharger for 4HG1-T Engine has a unit con-
struction of turbine housing and exhaust manifold.
Color for caution plate on the 4HE1-TC turbocharger
are, EURO3 vehicles have a blue caution plate. All other
vehicles have a silver caution plate.

N6A1371E

TURBOCHARGER 6G-3

ON-VEHICLE SERVICE

Charge Air Pipe

Removal

1. Connecting hose clamps.
2. Connecting hoses.

3. Bracket bolts and washers and charge air pipe.

4. Clamps.
5. Connecting hose.
6. Bracket accelerator cable.
7. Bracket engine stop cable and vacuum hose.
8. Engine harness connector.
9. Charge air pipe.

10. Gasket.

Caution:

• Check hoses for deterioration, or damage.
• Charge air pipes for damage.

Installation

1. Gasket to the intake manifold.
2. Charge air pipe.
3. Engine harness connector.
4. Bracket engine stop cable and vacuum hose.
5. Bracket accelerator cable.
6. Connecting hose.
7. Clamps.
8. Charge air pipe and bracket bolts.
9. Connecting hoses.

10. Clamps.

Intake Manifold

Component

Removal

1. PCV hose.
2. Accelerator cable injection pump side.
3. Connecting hose.

4. Bracket accelerator cable.
5. Bracket engine stop cable and vacuum hose.
6. Engine harness connector.
7. Charge air pipe.

N6A1374E

Legend

1. Intake manifold

2. Intake manifold gasket

N6A1372E