NISSAN TEANA 2003 Service Manual

INTAKE MANIFOLD COLLECTOR
EM-133
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INTAKE MANIFOLD COLLECTORPFP:14003
Removal and InstallationBBS004VR
1. Bracket 2. Electric throttle control actuator 3. Gasket
4. Intake manifold collector (upper) 5. Intake manifold collector support 6. PCV hose
7. Water hose 8. Vacuum hose 9. Water hose
10. Gasket 11. Harness bracket 12. Vacuum hose
13. VIAS control solenoid valve 14. Power valve 15. Gasket
16. Gasket 17. Intake manifold 18. Gasket
19. Intake manifold collector (lower) 20. Bracket 21.EVAP canister purge volume control
solenoid valve
22. Vacuum hose 23. EVAP hose 24. Vacuum tank
A. To rocker cover (right bank) B. To water outlet C. To heater pipe
D. To brake booster E. To vacuum pipe (EVAP canister) F. VQ23DE
PBIC4580J

EM-134
[VQ]
INTAKE MANIFOLD COLLECTOR


Refer to GI-10, "Components" for symbol marks in the figure.
NOTE:
The figure illustrates VQ35DE as an example. Each part form of VQ23DE is different from VQ35DE for differ-
ence of port diameter and so forth. Only portions which structures (components) differ are illustrated.
REMOVAL
WARNING:
To avoid the danger of being scalded, do not drain engine coolant when engine is hot.
NOTE:
Show VQ35DE as an example unless the figure includes specification.
1. Remove engine cover.
CAUTION:
Be careful not to damage or scratch engine cover.
2. Remove air cleaner case (upper) with mass air flow sensor and air duct assembly. Refer to EM-131, "
AIR
CLEANER AND AIR DUCT" .
3. Drain engine coolant, or when water hoses are disconnected, attach plug to prevent engine coolant leak-
age. Refer to CO-34, "
Changing Engine Coolant" .
CAUTION:
Perform this step when engine is cold.
4. Remove electric throttle control actuator as follows:
a. Disconnect harness connector.
b. Loosen mounting bolts in the reverse order as shown in the fig-
ure.
CAUTION:

Handle carefully to avoid any shock to electric throttle
control actuator.

Do not disassemble.
5. Disconnect water hoses from intake manifold collector (upper).

When engine coolant is not drained from radiator, attach plug to water hoses to prevent engine coolant
leakage.
PBIC2454E
KBIA2007J

INTAKE MANIFOLD COLLECTOR
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6. Remove the following:

Va c u u m h o s e

PCV hose

Power steering hose bracket

Intake manifold collector support

Harness bracket
7. Disconnect vacuum hose, EVAP hose and harness connector from EVAP canister purge volume control
solenoid valve.
8. Remove EVAP canister purge volume control solenoid valve.
9. Remove VIAS control solenoid valve and vacuum tank.

Add mating marks as necessary for easier installation.
10. Loosen mounting nuts and bolts in the reverse order as shown
in the figure to remove intake manifold collectors (upper and
lower) assembly and gasket.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
NOTE:
Disregard the numerical order No. 7 to 9 in removal. (VQ23DE)
11. Loosen mounting bolts in the reverse order as shown in the fig-
ure to remove intake manifold collector (upper) from intake man-
ifold collector (lower).
PBIC2455E
PBIC2456E
PBIC2457E
SEM712G

EM-136
[VQ]
INTAKE MANIFOLD COLLECTOR

12. Loosen mounting bolts in the reverse order as shown in the fig-
ure to remove power valve from intake manifold collector
(lower).
INSPECTION AFTER REMOVAL
Surface Distortion

Check the surface distortion of intake manifold collector (lower)
with straightedge and feeler gauge.

If it exceeds the limit, replace intake manifold collector (lower).
INSTALLATION
Note the following, and install in the reverse order of removal.
NOTE:
Show VQ35DE as an example unless the figure includes specification.
Power Valve
Tighten mounting bolts in numerical order as shown in the figure.
Intake Manifold Collector (Upper)
Tighten mounting bolts in numerical order as shown in the figure.
SEM714G
Limit : 0.1 mm (0.004 in)
PBIC1168E
SEM714G
SEM712G

INTAKE MANIFOLD COLLECTOR
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Intake Manifold Collector (Lower)
Tighten mounting nuts and bolts in numerical order as shown in the
figure.
NOTE:
Tighten mounting bolts No. 1, 2 and 4 in two steps. The numerical
order of No. 7, 8 and 9 shows second step. (VQ23DE)
Electric Throttle Control Actuator

Install gasket with positioning no-protrusion surface upward or downward. (VQ35DE)

Tighten mounting bolts in numerical order as shown in the fig-
ure.

Perform the “Throttle Valve Closed Position Learning” when har-
ness connector of electric throttle control actuator is discon-
nected. Refer to EC-389, "
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-389, "
Idle Air Volume Learning" .
PBIC2456E
PBIC2457E
KBIA2007J

EM-138
[VQ]
INTAKE MANIFOLD

INTAKE MANIFOLDPFP:14003
Removal and InstallationBBS004VS
NOTE:
Figure is shown as an example VQ35DE. VQ23DE has a different port shape, bolt hole for intake manifold collector (lower) installation
and stud bolt position.
REMOVAL
1. Release fuel pressure. Refer to EC-392, "FUEL PRESSURE RELEASE" .
2. Remove intake manifold collectors (upper and lower). Refer to EM-133, "
INTAKE MANIFOLD COLLEC-
TOR" .
3. Remove fuel tube and fuel injector assembly. Refer to EM-155, "
FUEL INJECTOR AND FUEL TUBE" .
4. Loosen mounting nuts and bolts in the reverse order as shown
in the figure to remove intake manifold.
5. Remove gaskets.
1. Intake manifold 2. Gasket
PBIC2458E
PBIC2459E
PBIC2460E

INTAKE MANIFOLD
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CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion

Check the surface distortion of the intake manifold mating sur-
faces with straightedge and feeler gauge.

If it exceeds the limit, replace intake manifold.
INSTALLATION
Note the following, and install in the reverse order of removal.
Intake Manifold

If stud bolts were removed, install them and tighten to the specified torque below.

Position the direction of embossed letter at the edge as shown
in the figure, and install intake manifold.

Tighten all mounting nuts and bolts to the specified torque in two
or more steps in numerical order shown in the figure.Limit : 0.1 mm (0.004 in)
PBIC0870E
: 10.8 N·m (1.1 kg-m, 8 ft-lb)
1st step
: 7.4 N·m (0.75 kg-m, 5 ft-lb)
2nd step and after
: 29.0 N·m (3.0 kg-m, 21 ft-lb)
PBIC2459E
PBIC2460E

EM-140
[VQ]
EXHAUST MANIFOLD AND THREE WAY CATALYST

EXHAUST MANIFOLD AND THREE WAY CATALYSTPFP:14004
Removal and InstallationBBS004VT
REMOVAL
WARNING:
Perform the work when the exhaust and cooling system have completely cooled down.
1. Drain engine coolant. Refer to CO-34, "
Changing Engine Coolant" .
CAUTION:

Perform this step when engine is cold.

Do not spill engine coolant on drive belts.
2. Remove the following:

Engine cover; Refer to EM-133, "INTAKE MANIFOLD COLLECTOR" .

Air duct (inlet), air cleaner cases (upper and lower) with mass air flow sensor and air duct assembly;
Refer to EM-131, "
AIR CLEANER AND AIR DUCT" .

Undercover

Radiator and radiator cooling fan assembly; Refer to CO-37, "RADIATOR" .
1. Heated oxygen sensor 1 (bank 1) 2. Exhaust manifold cover (right bank) 3. Exhaust manifold (right bank)
4. Ring gasket 5. Three way catalyst (right bank) 6.Three way catalyst support (right
bank)
7. Heated oxygen sensor 2 (bank 1) 8. Gasket 9. Gasket
10. Heated oxygen sensor 1 (bank 2) 11. Three way catalyst (left bank) 12. Three way catalyst cover
13. Three way catalyst cover 14. Three way catalyst cover 15.Three way catalyst support (left
bank)
16. Heated oxygen sensor 2 (bank 2) 17. Exhaust manifold cover (left bank) 18. Exhaust manifold (left bank)
PBIC2461E

EXHAUST MANIFOLD AND THREE WAY CATALYST
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3. Remove exhaust front tube mounting bracket and then remove exhaust front tube. Refer to EX-2,
"EXHAUST SYSTEM" .
4. Remove heat insulator.
5. Disconnect harness connector and remove heated oxygen sen-
sor 1 on both banks with heated oxygen sensor wrench (SST).

Put marks to identify installation positions of each heated oxy-
gen sensor 1.
CAUTION:

Be careful not to damage heated oxygen sensor 1.

Discard any heated oxygen 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 left bank.
6. Disconnect harness connector and remove heated oxygen sen-
sor 2 on both banks with heated oxygen sensor wrench (SST).

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.
7. Remove exhaust manifold covers (right and left banks) and three way catalyst covers.
8. Remove mounting bolts in the reverse order as shown in the fig-
ure to remove three way catalyst supports (right and left banks).
9. Remove three way catalysts (right and left banks) by loosening bolts first and then removing nuts.
CAUTION:
Handle carefully to avoid any shock to three way catalyst.
PBIC2503E
PBIC2462E
PBIC2544E
PBIC2463E

EM-142
[VQ]
EXHAUST MANIFOLD AND THREE WAY CATALYST

10. Loosen mounting nuts in the reverse order as shown in the fig-
ure to remove exhaust manifolds (right and left banks).
11. Remove gaskets.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion

Check the surface distortion of the exhaust manifold mating sur-
faces with straightedge and feeler gauge.

If it exceeds the limit, replace exhaust manifold.
INSTALLATION
Note the following, and install in the reverse order of removal.
Exhaust Manifold Gasket
Install in the direction indicated in the figure.
PBIC2464E
Limit : 0.3 mm (0.012 in)
PBIC1173E
KBIA1051E