Nissan Xterra. Instruction — part 350
EM-28
< REMOVAL AND INSTALLATION >
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INTAKE MANIFOLD
INTAKE MANIFOLD
Exploded View
INFOID:0000000009484454
Removal and Installation
INFOID:0000000009484455
NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-
ing.
REMOVAL
1. Remove intake manifold collector. Refer to
EM-25, "Removal and Installation"
2. Remove fuel tube and fuel injector assembly. Refer to
EM-45, "Removal and Installation"
3. Loosen nuts and bolts with power tool in reverse order as shown
to remove intake manifold.
4. Remove gaskets.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion
1.
Intake manifold
2.
Gasket
PBIC2878E
PBIC2879E
INTAKE MANIFOLD
EM-29
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• Check the surface distortion of the intake manifold mating surface
with straightedge and feeler gauge.
• If it exceeds the limit, replace intake manifold.
INSTALLATION
Installation is in the reverse order of removal. Note the following:
Intake Manifold
• If stud bolts were removed from cylinder head, install them and tighten to the specified torque.
• Tighten all nuts and bolts to the specified torque in two or more
steps in numerical order as shown.
• Adjust neutral position steering angle sensor.
• Erase CPU memory.
• Perform the "Throttle Valve Closed Position Learning" when harness connector of electric throttle control
actuator is disconnected. Refer to
EC-125, "Throttle Valve Closed Position Learning"
• Perform the "Idle Air Volume Learning" and "Throttle Valve Closed Position Learning" when electric throttle
control actuator is replaced. Refer to
EC-125, "Idle Air Volume Learning"
Limit
: 0.1 mm (0.004 in)
PBIC0870E
Intake manifold studs
: 10.8 N·m (1.1 kg-m, 8 ft-lb)
Intake manifold bolt and nuts
1st step
: 7.4 N·m (0.75 kg-m, 65 in-lb)
2nd step
: 29.0 N·m (3.0 kg-m, 21 ft-lb)
PBIC2879E
EM-30
< REMOVAL AND INSTALLATION >
[VQ40DE]
EXHAUST MANIFOLD AND THREE WAY CATALYST
EXHAUST MANIFOLD AND THREE WAY CATALYST
Exploded View
INFOID:0000000009484456
Removal and Installation (Three Way Catalyst)
INFOID:0000000009484457
WARNING:
Perform the work when the exhaust and cooling system have cooled sufficiently.
REMOVAL
1. Remove the front wheel and tire. Refer to
.
2. Remove the mudguard (if equipped) and front fender protector. Refer to
EXT-22, "Removal and Installa-
3. Remove the exhaust manifold cover bolts.
4. Remove the center exhaust tube, main muffler and front exhaust tube. Refer to
5. Disconnect the harness connector from air fuel ratio sensor.
6. Remove the three way catalyst nuts and remove the three way catalyst.
7. Remove the air fuel ratio sensor 1 using Tool, if necessary.
1.
Cylinder head (LH)
2.
Cylinder head (RH)
3.
Exhaust manifold studs (RH)
4.
Gasket
5.
Exhaust manifold nuts (RH)
6.
Exhaust manifold (RH)
7.
Exhaust manifold cover (RH)
8.
Three way catalyst (RH)
9.
Three way catalyst studs (RH)
10. Seal ring
11. Three way catalyst nuts (RH)
12. Three way catalyst nuts (LH)
13. Seal ring
14. Three way catalyst studs (LH)
15. Three way catalyst (LH)
16. Exhaust manifold cover (LH)
17. Exhaust manifold (LH)
18. Exhaust manifold nuts (LH)
19. Gasket
20. Exhaust manifold studs (LH)
ALBIA0654GB
EXHAUST MANIFOLD AND THREE WAY CATALYST
EM-31
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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:0000000009484458
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
.
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
5. Disconnect water hoses at heater pipe. Refer to
6. Remove heater pipe from cylinder head (LH). Refer to
.
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
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