INFINITI FX35 2008 Service Manual

AIR CLEANER AND AIR DUCTEM-17
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AIR CLEANER AND AIR DUCT
ComponentINFOID:0000000001325707
Removal and InstallationINFOID:0000000001325708
REMOVAL
1. Remove engine cover with power tool. Refer to
EM-19, "Component".
 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 senso r 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.
 If anything found replace air hose.
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
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EM-18
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AIR CLEANER AND AIR DUCT
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 FilterINFOID:0000000001325709
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 position 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.
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INTAKE MANIFOLD COLLECTOREM-19
< SERVICE INFORMATION > [VQ35DE]
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INTAKE MANIFOLD COLLECTOR
ComponentINFOID:0000000001325710
Removal and InstallationINFOID:0000000001325711
REMOVAL
WARNING:
 To avoid the danger of being scalded, never dr
ain engine coolant when the engine is hot.
 Gasket for intake manifold collector (upper) is secu red together with mounting bolt for intake mani-
fold 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)
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EM-20
< SERVICE INFORMATION >[VQ35DE]
INTAKE MANIFOLD COLLECTOR
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, "
Component".
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 an y shock to electric throttle
control actuator.
 Do not disassemble.
5. Remove fuel sub-tube mounting bolt to disconnect from r ear of intake manifold collector (lower). Refer to
EM-45, "
Component".
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).
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INTAKE MANIFOLD COLLECTOREM-21
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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 co llector (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).
INSTALLATION
Note the following, and install in the reverse order of removal.
Part Installation Direction
PBIC0773E
PBIC0774E
Limit : 0.1 mm (0.004 in)
PBIC0775E
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EM-22
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INTAKE MANIFOLD COLLECTOR
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 specifiedtorque 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 figure.
Water Hose
 Insert hose by 27 to 32 mm (1. 06 to 1.26 in) from connector end.
 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.
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
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INTAKE MANIFOLD COLLECTOREM-23
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 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 disconnected.
Refer to EC-85, "
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-85, "
Idle Air Volume Learning".
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EM-24
< SERVICE INFORMATION >[VQ35DE]
INTAKE MANIFOLD
INTAKE MANIFOLD
ComponentINFOID:0000000001325712
Removal and InstallationINFOID:0000000001325713
REMOVAL
1. Release fuel pressure. Refer to
EC-87, "Fuel Pressure Check".
2. Remove intake manifold colle ctors (upper and lower). Refer to EM-19, "
Component".
3. Remove fuel tube and fuel injector assembly. Refer to EM-45, "
Component".
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.
INSPECTION AFTER REMOVAL
Surface Distortion
1. Harness bracket 2. Intake manifold 3. Gasket
SBIA0487E
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INTAKE MANIFOLDEM-25
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 Check the surface distortion of the intake manifold mating surface
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
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EM-26
< SERVICE INFORMATION >[VQ35DE]
EXHAUST MANIFOLD AND THREE WAY CATALYST
EXHAUST MANIFOLD AND THREE WAY CATALYST
ComponentINFOID:0000000001325714
 Refer to
GI-8, "Component" for symbols in the figure.
Removal and InstallationINFOID:0000000001325715
REMOVAL
WARNING:
Perform the work when the exhaust and co oling system have completely cooled down.
1. Remove engine cover with power tool. Refer to EM-19, "
Component".
2. Drain engine coolant. Refer to CO-10, "
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, "
Component".
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)
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