Infiniti QX56 (JA60). Manual - part 492

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< PREPARATION >

PREPARATION

PREPARATION

PREPARATION

Special Service Tool

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The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Commercial Service Tool

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Tool number
(Kent-Moore No.)
Tool name

Description

KV10114400
(J-38365)
Heated oxygen sensor wrench

Loosening or tightening heated oxygen sen-
sors:
a: 22 mm (0.87 in)

S-NT636

(Kent-Moore No.)
Tool name

Description

 (J-43897-18)
 (J-43897-12)
Oxygen sensor thread cleaner

Reconditioning the exhaust system threads 
before installing a new heated oxygen sensor 
(Use with anti-seize lubricant shown below):
a: J-43897-18 (18 mm, 0.71 in) dia. 
b: J-43897-12 (12 mm, 0.47 in) dia. 

Anti-seize lubricant (Permatex 133AR 
or equivalent meeting MIL specifica-
tion MIL-A-907)

Lubricating oxygen sensor thread cleaning 
tool when reconditioning exhaust system 
threads

Power tool

Loosening nuts and bolts

AEM488

AEM489

PBIC0190E

EXHAUST SYSTEM

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< ON-VEHICLE MAINTENANCE >

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ON-VEHICLE MAINTENANCE

EXHAUST SYSTEM

Checking Exhaust System

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Check exhaust pipes, muffler and mounting for improper attachment, leaks, cracks, damage or deterioration.

• If anything is found, repair or replace damaged parts.

SMA211A

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< ON-VEHICLE REPAIR >

EXHAUST SYSTEM

ON-VEHICLE REPAIR

EXHAUST SYSTEM

Exploded View

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Exhaust System

Removal and Installation

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WARNING:

• Perform the operation with the exhaust system fully cooled. The system will be hot just after the

engine stops. 

• Be careful not to cut your hand on the heat insulator edge.

CAUTION:

• Be sure to use genuine exhaust system parts or equivalents which are specially designed for heat

resistance, corrosion resistance, and shape.

REMOVAL

Remove exhaust system components using power tool.

• Remove heated oxygen sensor using Tool as needed.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Always replace exhaust gaskets with new ones when reassembling.

AWBIA0667GB

1.

Tailpipe hanger bracket

2.

Tailpipe

3.

Gasket

4.

Main muffler

5.

Right front exhaust tube

6.

Ring gasket

7.

Heated oxygen sensor 2 (bank 2)

8.

Heated oxygen sensor 2 (bank 1)

9.

Left front exhaust tube

10. Center exhaust tube

11. Muffler hanger bracket front

12. Muffler hanger bracket rear

Front

Tool number

KV10114400 (J-38365)

EXHAUST SYSTEM

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• Before installing a new heated oxygen sensor, clean and lube the exhaust tube threads using suit-

able tool.

• Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7

in) onto a hard surface such as a concrete floor; replace with a new one.

• Do not over-tighten the heated oxygen sensor. Doing so may damage the heated oxygen sensor,

resulting in the MIL coming on.

• If any mounting insulator is badly deformed, repair or replace it. If deposits such as mud pile up on

the mounting insulators, clean and inspect them.

• Temporarily tighten the nuts on the exhaust manifold side and the bolts on the vehicle side. Check

each part for interference with other components, and then tighten the nuts and bolts to specifica-

tion. 

INSPECTION AFTER INSTALLATION

• With the engine running, check exhaust tube joints for gas leakage and unusual noises.

• Check to ensure that mounting brackets and mounting rubbers are installed properly and free from undue

stress. Improper installation could result in excessive noise and vibration. 

Oxygen sensor thread cleaner :  — (J-43897-18)
Oxygen sensor thread cleaner :  — (J-43897-12)