Nissan ENGINE - Page 31

EXHAUST MANIFOLD AND THREE WAY CATALYST
EM-31
< REMOVAL AND INSTALLATION >
[VQ40DE]
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CAUTION:
• Be careful not to damage air fuel ratio sensor 1.
• Discard any air fuel ratio sensor 1 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 sensor.
INSTALLATION
Installation is in the reverse order of removal.
• Tighten air fuel ratio sensor 1 to specification, if removed.
CAUTION:
• Do not over tighten air fuel ratio sensor 1. Doing so may cause damage to air fuel ratio sensor 1,
resulting in the “MIL” coming on.
• Before installing a new air fuel ratio sensor 1, clean exhaust system threads using oxygen sensor
thread cleaner and apply anti-seize lubricant.
Removal and Installation (Exhaust Manifold) INFOID:0000000008798970
REMOVAL (LH)
WARNING:
Perform the work when the exhaust and cooling system have cooled sufficiently.
NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-
ing.
1. Remove air cleaner case (upper) and air duct and resonator assembly. Refer to EM-24, "Exploded View"
.
2. Partially drain engine coolant. Refer to CO-11, "Changing Engine Coolant"
.
3. Remove three way catalyst (LH). Refer to EM-30, "Removal and Installation (Three Way Catalyst)"
.
4. Remove oil level gauge and oil level gauge guide. Refer to EM-34, "Exploded View"
.
5. Disconnect water hoses at heater pipe. Refer to CO-28, "Exploded View"
.
6. Remove heater pipe from cylinder head (LH). Refer to CO-28, "Exploded View"
.
7. Loosen nuts in reverse order as shown.
• : Front
NOTE:
Disregard the numerical order No. 7 and 8 in removal.
8. Remove exhaust manifold (LH).
9. Remove gaskets.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL (LH)
Surface Distortion
Tool number : KV991J0050 (J-44626)
Air fuel ratio sensor : 50.0 N·m (5.1 kg-m, 37 ft-lb)
Oxygen sensor thread cleaner : — (J-43897-12)
Oxygen sensor thread cleaner : — (J-43897 18)
AWBIA0725ZZ
Revision: January 2013 2013 Xterra