INFINITI FX35 2005 Service Manual

EM-16
[VQ35DE]
DRIVE BELTS
Revision: 2005 July 2005 FX
ALTERNATOR AND POWER STEERING OIL PUMP BELT
1. Remove front engine undercover with power tool.
2. Loosen idler pulley lock nut (A) and adjust tension by turning adjusting bolt (B).

For the specified belt tension, refer to EM-15, "Checking Drive
Belts" .
3. Tighten nut (A).
A/C COMPRESSOR BELT
1. Remove front engine undercover with power tool.
2. Loosen idler pulley lock nut (C) and adjust tension by turning adjusting bolt (D).

For the specified belt tension, refer to EM-15, "Checking Drive Belts" .
3. Tighten nut (C).
Removal and InstallationABS004TZ
REMOVAL
1. Remove front engine undercover with power tool.
2. Remove alternator and power steering oil pump belt. Refer to EM-16, "
ALTERNATOR AND POWER
STEERING OIL PUMP BELT" .
3. Remove A/C compressor belt. Refer to EM-16, "
A/C COMPRESSOR BELT" .
CAUTION:
Grease is applied to idler pulley adjusting bolt. Be careful to keep grease away from belt.
INSTALLATION
1. Install belts to pulley in reverse order of removal.
CAUTION:

Make sure drive belt is correctly engaged with pulley groove.

Make sure that for engine oil and engine coolant do not adhere to belt and each pulley grooves.
2. Adjust belt tension. Refer to EM-15, "
Tension Adjustment" .
3. Tighten each adjusting bolt and nut to the specified torque.
4. Make sure that tension of each belt is within the standard. Refer to EM-15, "
Checking Drive Belts" .
: 34.8 N·m (3.5 kg-m, 26 ft-lb)
SBIA0532E
: 34.8 N·m (3.5 kg-m, 26 ft-lb)

AIR CLEANER AND AIR DUCT EM-17
[VQ35DE]
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Revision: 2005 July 2005 FX
AIR CLEANER AND AIR DUCTPFP:16500
ComponentsABS00E5V
Removal and InstallationABS004U0
REMOVAL
1. Remove engine cover with power tool. Refer to EM-19, "INTAKE MANIFOLD COLLECTOR" .

This work is unnecessary when parts located forward of mass air flow sensor are removed/installed.
2. Remove air duct (inlet) and power duct.
3. Disconnect mass air flow sensor harness connector.
4. Disconnect PCV hose.
5. Remove air cleaner case/mass air flow sensor and air duct disconnecting their joints.

Add marks as necessary for easier installation.
6. Remove mass air flow sensor from air cleaner case. CAUTION:
Handle mass air flow sensor with the following cares.

Do not shock it.

Do not disassemble it.

Do not touch its sensor.
7. Remove resonator in fender, lifting left fender protector.
INSPECTION AFTER REMOVAL
Inspect air hoses for cracks or tear.
1. Air hose 2. PCV hose 3. Air duct
4. Air hose 5. Power duct 6. Clip
7. Air duct (inlet) 8. Resonator 9. Grommet
10. Air cleaner case 11. Air cleaner filter 12. Air cleaner case
13. O-ring 14. Mass air flow sensor
SBIA0462E

EM-18
[VQ35DE]
AIR CLEANER AND AIR DUCT
Revision: 2005 July 2005 FX

If anything found replace air hose.
INSTALLATION
Note the following, and install in the reverse order of removal.

Align marks. Attach each joint. Screw clamps firmly.

To position air cleaner case, refer to EM-18, "Changing Air Cleaner Filter" .
Changing Air Cleaner FilterABS004U1
INSPECTION
Check status (fouling, damage, etc.) of air cleaner filter at power duct
hole.
REMOVAL
Removal in the order below.
1. Remove air duct (inlet) from air cleaner case.
2. Disconnect harness connector from mass air flow sensor.
3. Loosen clamp bolts of air hose.
4. Remove mounting bolts for air cleaner case. Remove air cleaner case/mass air flow sensor/air hose assembly.
5. Unhook clips and open air cleaner case, and remove air cleaner filter.
INSTALLATION
Note the following, and install in the reverse order of removal.

If grommet at bottom of air cleaner case comes off together with
air cleaner case, fix it to vehicle before installation.

Look at internal bottom face through power duct hole, and posi-
tion air cleaner case with resonator upper end circle and air
cleaner case round hole aligned. Then push air cleaner case
straight down.

At this time, check by hand if protrusion at bottom of air cleaner
case has been inserted into grommet on vehicle side.

Clip power duct with bulge on reverse side of lower end
engaged with air cleaner case.
SBIA0463E
SBIA0464E
KBIA0954E

INTAKE MANIFOLD COLLECTOR EM-19
[VQ35DE]
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Revision: 2005 July 2005 FX
INTAKE MANIFOLD COLLECTORPFP:14003
ComponentsABS00E5W
Removal and InstallationABS009RG
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: 2005 July 2005 FX
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: 2005 July 2005 FX
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: 2005 July 2005 FX
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: 2005 July 2005 FX

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-96, "
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-97, "
Idle Air Volume Learning" .
KBIA0957E

EM-24
[VQ35DE]
INTAKE MANIFOLD
Revision: 2005 July 2005 FX
INTAKE MANIFOLDPFP:14003
ComponentsABS00E5X
Removal and InstallationABS004U3
REMOVAL
1. Release fuel pressure. Refer to EC-99, "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
[VQ35DE]
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Revision: 2005 July 2005 FX
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