Infiniti QX56 (JA60). Manual — part 492
EX-4
< 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
EX-5
< 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
EX-6
< 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
EX-7
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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)
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