2008 NISSAN TEANA engine

INTAKE MANIFOLD COLLECTOR
EM-29
< ON-VEHICLE REPAIR >
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Removal and InstallationINFOID:0000000003802254
REMOVAL
WARNING:
To avoid the danger of being scalded, never drain engine coolant when the engine is hot.
1. Remove engine cover. Refer to EM-24, "
Exploded View".
CAUTION:
Be careful not to damage or scratch engine cover.
1. Vacuum hose 2. Clamp 3. Clamp
4. PCV hose 5. Intake manifold collector 6. Gasket
7. Vacuum hose 8. Bracket 9.Electronic controlled engine mount
control solenoid valve
10. Vacuum hose 11. Vacuum hose 12. Vacuum hose
13. Vacuum gallery 14. Vacuum hose 15. Vacuum hose
16. VIAS control solenoid valve 2 17. VIAS control solenoid valve 1 18.EVAP canister purge control solenoid
valve
19. Clamp 20. EVAP hose 21. Service port
22. Bracket 23. EVAP hose 24. EVAP hose
25. EVAP pipe 26. EVAP hose 27. Clamp
28. Water hose 29. Water hose 30. Bracket
31. Electric throttle control actuator 32. Gasket
A. To brake booster B. To rocker cover (bank 1) C. To vacuum tube (rear)
D. To vacuum pipe E. To heater pipe F. To water outlet
: Engine front
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA1713GB

EM-30
< ON-VEHICLE REPAIR >
INTAKE MANIFOLD COLLECTOR
2. Remove air cleaner cases (upper and lower) with mass air flow sensor and air duct assembly. Refer to
EM-26, "
Exploded View".
3. Drain engine coolant, or when water hoses are disconnected, attach plug to prevent engine coolant leak-
age. Refer to CO-8, "
Draining".
CAUTION:
Perform this step when the engine is cold.
4. Remove front wiper arm and extension cowl top. Refer to WW-105, "
Exploded View" and EXT-20,
"Exploded View".
5. Disconnect water hoses from electric throttle control actuator.
 When engine coolant is not drained from radiator, attach plug to water hoses to prevent engine coolant
leakage.
6. Remove electric throttle control actuator as follows:
a. Disconnect harness connector.
b. Loosen mounting bolts in reverse order as shown in the figure.
CAUTION:
 Handle carefully to avoid any shock to electric throttle
control actuator.
 Never disassemble.
7. Remove the following parts:
 Vacuum hose
 PCV hose
 High pressure piping from intake manifold collector: Refer to ST-34, "
Exploded View".
 Electronic controlled engine mount control solenoid valve
8. Disconnect EVAP hoses and harness connector from EVAP canister purge control solenoid valve.
9. Remove EVAP canister purge control solenoid valve and bracket assembly.
10. Remove VIAS control solenoid valve mounting bolts and vacuum gallery mounting bolts, and then move
vacuum gallery.
 Add mating marks as necessary for easier installation.
11. Loosen mounting nuts and bolts in reverse order as shown in
the figure, and remove intake manifold collector and gasket.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
NOTE:
Figure is shown as an example of VQ35DE.
INSTALLATION
Note the following, and install in the reverse order of removal.
Intake Manifold Collector
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: Engine front
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INTAKE MANIFOLD COLLECTOR
EM-31
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Tighten mounting nuts and bolts in numerical order as shown in the
figure.
NOTE:
Figure is shown as an example of VQ35DE.
Electric Throttle Control Actuator
 Tighten mounting bolts in numerical order as shown in the figure.
 Perform the “Throttle Valve Closed Position Learning” when har-
ness connector of electric throttle control actuator is disconnected.
Refer to EC-16, "
THROTTLE VALVE CLOSED POSITION
LEARNING : Special Repair Requirement".
 Perform the “Idle Air Volume Learning” and “Throttle Valve Closed
Position Learning” when electric throttle control actuator is
replaced. Refer to EC-16, "
IDLE AIR VOLUME LEARNING : Spe-
cial Repair Requirement".
: Engine front
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JPBIA1631ZZ

EM-32
< ON-VEHICLE REPAIR >
INTAKE MANIFOLD
INTAKE MANIFOLD
Exploded ViewINFOID:0000000003802255
Removal and InstallationINFOID:0000000003802256
REMOVAL
1. Release fuel pressure. Refer to EC-411, "Inspection".
2. Remove intake manifold collector. Refer to EM-28, "
Exploded View".
3. Remove fuel tube and fuel injector assembly. Refer to EM-44, "
Exploded View".
4. Loosen mounting nuts and bolts in reverse order as shown in
the figure to remove intake manifold with power tool.
5. Remove gaskets.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSTALLATION
Note the following, and install in the reverse order or removal.
Intake Manifold
 If stud bolts were removed, install them and tighten to the specified torque below.
1. Intake manifold 2. Gasket
A. Refer to EM-32
Refer to GI-4, "Components" for symbols in the figure.
JPBIA1629GB
: Engine front
JPBIA1630ZZ
: 10.8 N·m (1.1 kg-m, 8 ft-lb)

INTAKE MANIFOLD
EM-33
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 Tighten all mounting nuts and bolts to the specified torque in two or
more steps in numerical order shown in the figure.
InspectionINFOID:0000000003802257
INSPECTION AFTER REMOVAL
Surface Distortion
 Check the surface distortion of the intake manifold mating surface
with a straightedge (A) and a feeler gauge (B).
 If it exceeds the limit, replace intake manifold.
: Engine front
1st step: 7.4 N·m (0.75 kg-m, 5 ft-lb)
2nd step and after: 25.5 N·m (2.6 kg-m, 19 ft-lb)
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Limit : Refer to EM-136, "Intake Manifold".
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EM-34
< ON-VEHICLE REPAIR >
EXHAUST MANIFOLD AND THREE WAY CATALYST
EXHAUST MANIFOLD AND THREE WAY CATALYST
Exploded ViewINFOID:0000000003802258
Removal and InstallationINFOID:0000000003802259
REMOVAL
WARNING:
Perform the work when the exhaust and cooling system have completely cooled down.
1. Remove following parts:
 Air duct (inlet), air cleaner case (upper) with mass air flow sensor and air duct assembly: Refer to EM-
26, "Exploded View".
 Engine cover: Refer to EM-24, "
Exploded View".
 Front wiper arm: Refer to WW-105, "
Exploded View".
 Extension cowl top: Refer to EXT-20, "
Exploded View".
2. Remove exhaust front tube. Refer to EX-5, "
Exploded View".
1. Gasket 2. Exhaust manifold (bank 1) 3. Exhaust manifold cover (bank 1)
4. Air fuel ratio sensor 1 (bank 1) 5. Ring gasket 6. Three way catalyst (bank 1)
7. Three way catalyst support (bank 1) 8. Heated oxygen sensor 2 (bank 1) 9. Air fuel ratio sensor 1 (bank 2)
10. Exhaust manifold cover (bank 2) 11. Exhaust manifold (bank 2) 12. Ring gasket
13. Three way catalyst (bank 2) 14. Three way catalyst support (bank 2) 15. Heated oxygen sensor 2 (bank 2)
A. To oil pan (upper) B. Upper mark
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA2235GB

EXHAUST MANIFOLD AND THREE WAY CATALYST
EM-35
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3. Disconnect harness connector and remove air fuel ratio sensor
1 on both banks with the heated oxygen sensor wrench [SST:
KV10117100 (J3647-A)] (B).
 Put marks to identify installation positions of each air fuel ratio
sensor 1.
CAUTION:
 Be careful not to damage air fuel ratio sensor 1.
 Discard any air fuel ratio sensor 1 which has been
dropped onto a hard surface such as a concrete floor.
Replace with a new sensor.
NOTE:
Figure is shown as an example of bank 2 (A).
4. Disconnect harness connector and remove heated oxygen sen-
sor 2 on both banks with the heated oxygen sensor wrench
[SST: KV10114400 (J38365)] (B).
 Put marks to identify installation positions of each heated oxy-
gen sensor 2.
CAUTION:
 Be careful not to damage heated oxygen sensor 2.
 Discard any heated oxygen sensor 2 which has been
dropped onto a hard surface such as a concrete floor.
Replace with a new sensor.
5. Remove exhaust manifold covers (bank 1 and bank 2).
6. Remove three way catalyst support mounting bolts (bank 1 and bank 2).
7. Remove three way catalysts (bank 1 and bank 2) by loosening bolts first and then removing nuts.
CAUTION:
Handle carefully to avoid any shock to three way catalyst.
8. Loosen mounting nuts in reverse order as shown in the figure to
remove exhaust manifolds (bank 1 and bank 2).
NOTE:
Disregard No. 7 and 8 when loosing.
9. Remove gaskets.
CAUTION:
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A : Bank 1
C : Bank 2
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A: Bank 1
B: Bank 2
: Engine front
JPBIA1633ZZ

EM-36
< ON-VEHICLE REPAIR >
EXHAUST MANIFOLD AND THREE WAY CATALYST
Cover engine openings to avoid entry of foreign materials.
INSTALLATION
Note the following, and install in the reverse order of removal.
Exhaust Manifold Gasket
Install in the direction indicated in the figure.
Exhaust Manifold
 If stud bolts were removed, install them and tighten to the torque specified below.
 Tighten mounting nuts in numerical order as shown in the figure.
NOTE:
No. 7 and 8 mean double tightening of nuts No. 1 and 2.
Three Way Catalyst Supports
1. Temporarily tighten three way catalyst support mounting bolts.
2. Tighten three way catalyst support mounting bolts to oil pan (upper).
3. Tighten three way catalyst support mounting bolts to three way catalyst.
Air Fuel Ratio Sensor 1 and Heated Oxygen Sensor 2
 Install air fuel ratio sensor 1 and heated oxygen sensor 2 in the original position.
A: Bank 1
B : Triangle press
C: Bank 2
: Engine front
PBIC4954E
: 15.4 N·m (1.6 kg-m, 11 ft-lb)
A: Bank 1
B: Bank 2
: Engine front
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