INFINITI FX35 2007 Service Manual

INTAKE MANIFOLD COLLECTOR EM-19
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Revision: 2006 July 2007 FX35/FX45
INTAKE MANIFOLD COLLECTORPFP:14003
ComponentsNBS003G5
Removal and InstallationNBS003G6
REMOVAL
WARNING:

To avoid the danger of being scalded, never drain engine coolant when the engine is hot.

Gasket for intake manifold collector (upper) is secured together with mounting bolt for intake man-
ifold collector (lower). Thus, even when only gasket for upper side is replaced, gasket for lower
side must be also replaced.
1. Electric throttle control actuator 2. Gasket 3. Vacuum hose
4. EVAP canister purge volume control
solenoid valve 5. Bracket 6. Intake manifold collector (upper)
7. Intake manifold collector cover 8. Gasket 9. Water hose
10. Bracket 11. Water hose 12. PCV hose
13. Intake manifold collector (lower)
SBIA0585E

EM-20
[VQ35DE]
INTAKE MANIFOLD COLLECTOR
Revision: 2006 July 2007 FX35/FX45
1. Remove engine cover with power tool.
2. Disconnect water hoses from intake manifold collector (upper), attach blind plug to prevent engine coolant leakage.
CAUTION:

Perform this step when the engine is cold.

Do not spill engine coolant on drive belts.
3. Remove air cleaner case and air duct. Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
4. Remove electric throttle control actuator as the following:
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.

Do not disassemble.
5. Remove fuel sub-tube mounting bolt to disconnect from rear of intake manifold collector (lower). Refer to EM-45, "
FUEL INJECTOR AND FUEL TUBE" .
6. Disconnect vacuum hose and water hose from intake manifold collector (upper).
7. Remove EVAP canister purge volume control solenoid valve bracket mounting bolt from intake manifold collector (upper).
SBIA0486E
KBIA0957E

INTAKE MANIFOLD COLLECTOR EM-21
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Revision: 2006 July 2007 FX35/FX45
8. Loosen mounting bolts in reverse order of illustration to remove
intake manifold collector (upper) with power tool.
9. Remove PCV hose [between intake manifold collector (lower) and rocker cover (right bank)].
10. Loosen mounting bolts in reverse order as shown in the figure, and remove intake manifold collector cover, gasket, intake man-
ifold collector (lower) and gasket with power tool.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion

Check the surface distortion of both the intake manifold collector
(upper and lower) mating surfaces with a straightedge and a
feeler gauge.

If it exceeds the limit, replace intake manifold collector (upper
and/or lower).
PBIC0773E
PBIC0774E
Limit : 0.1 mm (0.004 in)
PBIC0775E

EM-22
[VQ35DE]
INTAKE MANIFOLD COLLECTOR
Revision: 2006 July 2007 FX35/FX45
INSTALLATION
Note the following, and install in the reverse order of removal.
Part Installation Direction
Referring to front marks, install parts shown in figure.
Intake Manifold Collector (Lower)
Tighten mounting bolts in numerical order as shown in the figure.
NOTE:
Tighten mounting bolts to secure gasket (lower), intake manifold col-
lector (lower), gasket (upper), and intake manifold collector cover.
Intake Manifold Collector (Upper)

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

Shank length under bolt head varies with bolt location. Install
mounting bolts while referring to numbers shown below and in
the figure. (Bolt length does not include pilot portion.)

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

Insert hose by 27 to 32 mm (1.06 to 1.26 in) from connector end.
PBIC0776E
PBIC0774E
: 5.9 N·m (0.6 kg-m, 52 in-lb)
Bolt M6 × 25 mm (0.98 in) : 7, 8, 10, 11, 13, 14, 15, 16, 18
M6 × 45 mm (1.77 in) : 2, 4, 5
M6 × 60 mm (2.36 in) : 1, 3, 6, 9
M6 Nut : 12, 17
PBIC0773E

INTAKE MANIFOLD COLLECTOR EM-23
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Revision: 2006 July 2007 FX35/FX45

Clamp hose at location of 3 to 7 mm (0.12 to 0.28 in) from hose end.
Electric Throttle Control Actuator

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

Tighten 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 discon-
nected. Refer to EC-83, "
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-83, "
Idle Air Volume Learning" .
KBIA0957E

EM-24
[VQ35DE]
INTAKE MANIFOLD
Revision: 2006 July 2007 FX35/FX45
INTAKE MANIFOLDPFP:14003
ComponentsNBS003G7
Removal and InstallationNBS003G8
REMOVAL
1. Release fuel pressure. Refer to EC-85, "FUEL PRESSURE RELEASE" .
2. Remove intake manifold collectors (upper and lower). Refer to EM-19, "
INTAKE MANIFOLD COLLEC-
TOR" .
3. Remove fuel tube and fuel injector assembly. Refer to EM-45, "
FUEL INJECTOR AND FUEL TUBE" .
4. Loosen mounting bolts and nuts 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.
1. Harness bracket 2. Intake manifold 3. Gasket
SBIA0487E
PBIC0778E

INTAKE MANIFOLD EM-25
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Revision: 2006 July 2007 FX35/FX45
INSPECTION AFTER REMOVAL
Surface Distortion

Check the surface distortion of the intake manifold mating sur-
face with a straightedge and a 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.

Tighten all mounting bolts and nuts 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)
PBIC0778E

EM-26
[VQ35DE]
EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2006 July 2007 FX35/FX45
EXHAUST MANIFOLD AND THREE WAY CATALYSTPFP:14004
ComponentsNBS003G9
Removal and InstallationNBS003GA
REMOVAL
WARNING:
Perform the work when the exhaust and cooling system have completely cooled down.
1. Remove engine cover with power tool. Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
2. Drain engine coolant. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:

Perform this step when the engine is cold.

Do not spill engine coolant on drive belts.
3. Remove air cleaner case and air duct. Refer to EM-17, "
AIR CLEANER AND AIR DUCT" .
4. Remove front and rear engine undercover and front cross bar with power tool.
5. Disconnect heated oxygen sensors 2 (bank 1 and bank 2) harness connectors.
1. Heated oxygen sensor 2 (bank 1) 2. Three way catalyst (right bank) 3. Gasket
4. Air fuel ratio sensor 1 (bank 1) 5. Exhaust manifold cover (right bank) 6. Exhaust manifold (right bank)
7. Exhaust manifold (left bank) 8. Exhaust manifold cover (left bank) 9. Three way catalyst (left bank)
10. Air fuel ratio sensor 1 (bank 2) 11. Heated oxygen sensor 2 (bank 2)
PBIC3103E

EXHAUST MANIFOLD AND THREE WAY CATALYST EM-27
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Revision: 2006 July 2007 FX35/FX45
6. Using the heated oxygen sensor wrench (SST), remove heated
oxygen sensors 2 (bank 1 and bank 2).
CAUTION:

Be careful not to damage heated oxygen sensor.

Discard any heated oxygen sensor which has been
dropped onto a hard surface such as a concrete floor;
replace with a new sensor.
7. Remove exhaust mounting bracket between three way catalysts (right and left bank) and transmission. Refer to EX-3, "
EXHAUST SYSTEM" .
8. Remove three way catalysts (right and left bank).
9. Disconnect air fuel ratio sensor 1 (bank 1 and bank 2) harness connectors and remove harness clip.
10. Using the heated oxygen sensor wrench (SST), remove air fuel ratio sensor 1 (bank 1 and bank 2).
CAUTION:

Be careful not to damage air fuel ratio sensor.

Discard any air fuel ratio sensor which has been dropped
onto a hard surface such as a concrete floor; replace with
a new sensor.
11. Remove water pipe and heater pipe on both right and left side. Refer to CO-29, "
WATER OUTLET AND
WATER PIPING" .
12. Remove exhaust manifold cover (right and left bank).
13. Loosen mounting nuts in the reverse order as shown in the fig- ure to remove exhaust manifold with power tool.
NOTE:
Disregard the numerical order No. 7 and 8 in removal.
14. Remove gaskets. CAUTION:
Cover engine openings to avoid entry of foreign materials.
KBIA1740E
SBIA0575E
PBIC2042E

EM-28
[VQ35DE]
EXHAUST MANIFOLD AND THREE WAY CATALYST
Revision: 2006 July 2007 FX35/FX45
INSPECTION AFTER REMOVAL
Surface Distortion

Check the surface distortion of the exhaust manifold mating sur-
face with a straightedge and a 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 direction shown below. (Follow same procedure for
both banks.)

Locate thick side of port connecting part on right side from tech-
nician’s view.

Locate round press in thick side of port connecting part above
center level line of port.
Exhaust Manifold

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

Install exhaust manifold and tighten mounting bolts in numerical
order as shown in the figure.
NOTE:
Tighten nuts No. 1 and 2 in two steps. The numerical order No. 7
and 8 shows second step. Limit : 0.3 mm (0.012 in)
PBIC1096E
KBIA1051E
: 14.7 N·m (1.5 kg-m, 11 ft-lb)
PBIC2042E