Isuzu N-Series. Manual - part 469

6F-2 EXHAUST

GENERAL DESCRIPTION

Component

The vehicle is equipped with a single horizontal exhaust
system which consists of a front exhaust pipe with a
heat shield attached, a main exhaust pipe, a silencer
with catalytic converter and a tail pipe.
An engine exhaust brake is attached between the front
exhaust pipe and the exhaust manifold.
The exhaust brake, when turned on, restricts the flow of
exhaust gases and thereby slows the engine.
Be sure the exhaust brake system is turned off before
performing any exhaust system diagnosis.

Gasket

The gasket must be replaced whenever a new exhaust
pipe, muffler or exhaust throttle is installed.
Catalytic Converter
For Taiwan

Legend

1. Flexible tube

3. Rubber mount

2. Rubber support

4. Silencer with converter

N6A1365E

Legend

1. Inlet assembly
2. Outlet assembly
3. Catalyst assembly
4. P.NO.

N6A1366E

EXHAUST 6F-3

For Venezuela

For Hongkong

Legend

1. Inlet assembly
2. Outlet assembly
3. Catalyst assembly
4. P.NO.

Legend

1. Inlet assembly
2. Outlet assembly
3. Catalyst assembly
4. P.NO.

N6A1681E

N6A1682E

6F-4 EXHAUST

ON-VEHICLE SERVICE

Rattles and noise vibrations in the exhaust system are
usually caused by misalignment of parts. When aligning
the system, leave all bolts or nuts loose until all parts are
properly aligned; then tighten, working from front to rear.

1. Check connections for looseness or damage, es-

pecially for exhaust gas leakage.

2. Check clamps and rubbers for weakness, cracks or

damage.

3. Check for dents or damage and for any holes or

cracks caused by corrosion.

Component

Front Exhaust Pipe

Removal

Preparation

• Disconnect battery negative cable.

1. Front Exhaust Pipe I (Exhaust manifold side) 

• Remove the three nuts from front exhaust pipe I

(exhaust manifold side)

• Remove the bolt from mounting bracket (engine

right side)

Legend

1. Front exhaust pipe I (Exhaust manifold side)

2. Front exhaust pipe II (Exhaust brake side)

N6A1368E

EXHAUST 6F-5

• Remove the four bolts and nuts from front exhaust

pipe II (exhaust brake side)

2. Front Exhaust Pipe II (exhaust brake side)

Installation

1. Front Exhaust Pipe II (exhaust brake side)

Tighten:
Exhaust brake unit fixing bolt to 17 N

⋅m (1.7 kg⋅m/12

lb

⋅ft)

2. Front Exhaust Pipe I (exhaust manifold side)

Tighten:
Exhaust Pipe II side to 17 N

⋅m (1.7 kg⋅m/12 lb⋅ft)

Mounting Bracket Bolt to 18 N

⋅m (1.8 kg⋅m/13 lb⋅ft)

Tighten:
Manifold Fixing Nut to 67 N

⋅m (6.8 kg⋅m /49 ft⋅lb)

• Connect battery ground cable.
• Start engine and check for exhaust gas leakage

from exhaust pipes.

N6A1369E

N6A1369E