Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 618

6F – 10 EXHAUST SYSTEM

Important Operations – Installation

Follow the removal procedure in the reverse order to
perform the installation procedure. Pay careful attention to
the important points during the installation procedure.

8. Front Pipe With Gasket

Connect the front pipe to the exhaust manifold.
Torque kg

⋅m(lb⋅ft/N⋅m)

6.8

± 0.5 (49 ± 3.6/67 ± 5)

6. Front Pipe BRKT

Tighten the fixing bolt to the specified torque.
Torque kg

⋅m(lb⋅ft/N⋅m)

Front pipe side 2.4

± 0.5 (17 ± 3.6/23 ± 5)

Transmission side 4.1

± 1.0 (30 ± 7/40 ± 1)

5. Oxidizing Catalytic Converter With Gasket (4JA1TC)

Center Pipe With Gasket (4JH1TC)
Tighten the fixing nuts to the specified torque.
Torque kg

⋅m(lb⋅ft/N⋅m)

4.4

± 1.3 (32 ± 9.4/43 ± 13)

3. Silencer With Gasket

Tighten the fixing nuts to the specified torque.
Torque kg

⋅m(lb⋅ft/N⋅m)

4.4

± 1.3 (32 ± 9.4/43 ± 13)

2. Tail Pipe With Gasket

Tighten the fixing nuts to the specified torque.
Torque kg

⋅m(lb⋅ft/N⋅m)

4.4

± 1.3 (32 ± 9.4/43 ± 13)

• Connect battery ground cable.
• After assembling each part, start the engine to check

for any leakage of gas at each connection.

EXHAUST SYSTEM 6F – 11

INSPECTION AND REPAIR

Make the necessary adjustments, repairs, and part replacements if excessive wear or damage is discovered during
inspection.

Front Exhaust Pipe
Rear Exhaust Pipe
Exhaust Silencer
Check the pipes for corrosion, cracking, damage or
misalignment and repair as required.
Check the rubber rings for deterioration or damage and repair
as required.

6F – 12 EXHAUST SYSTEM

TURBOCHARGER

MAIN DATA AND SPECIFICATIONS

Engine model

4JA1T, 4JB1T,

4JA1TC

4JG2T 4JH1TC

Turbocharger model

IHI RHF 4H

IHI RHB 52W or

RHF5H

RHF5H

Turbine type

Compressor type

Radial inflow

Radial outflow

Maximum permissible speed

rpm

180,000

172,000

180,000

Wastegate opening pressure

mmHg (inHg)

Safety valve opening pressure

mmHg (inHg)

189 – 887

850 - 910

Weight

kg (lb)

4.2 (9.3)

4.6 (10.1)

IHI : Ishikawajima Harima Heavy Industries., Ltd.

EXHAUST SYSTEM 6F – 13

GENERAL DESCRIPTION

The turbocharger internal mechanism consists of the turbine wheel, the compressor wheel, and the radial brarings.
These parts are supported by the bearing housing.
The turbocharger external mechanism consists of the compressor housing air intake port and the turbine housing
air exhaust port.
The turbocharger increases air intake efficiency. This results in increased engine power, reduced fuel consumption,
and minimal engine noise.
The turbocharger operates at very high speeds and temperatures. Part materials have been carefully selected and
machined to extremely high precision.
Turbocharger servicing requires great care and expertise.
If reduced performance is noted, check the engine for damage or wear. If there is no apparent engine damage or
wear, trouble with the turbocharger is indicated.