pcv INFINITI FX35 2004 Owner's Manual

EC-1332
[VK45DE]
POSITIVE CRANKCASE VENTILATION
Revision: 2004 November 2004 FX35/FX45
POSITIVE CRANKCASE VENTILATIONPFP:11810
DescriptionABS00CFY
SYSTEM DESCRIPTION
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake
manifold.
During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the PCV
valve.
Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of ventilating air.
The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air passes
through the hose connecting air inlet tubes to rocker cover.
Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve.
The flow goes through the hose connection in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all condi-
tions.
Component InspectionABS00CFZ
PCV (POSITIVE CRANKCASE VENTILATION) VALVE
With engine running at idle, remove PCV valve from rocker cover. A
properly working valve makes a hissing noise as air passes through
it. A strong vacuum should be felt immediately when a finger is
placed over valve inlet.
PBIB0062E
PBIB1588E
PBIB1589E

POSITIVE CRANKCASE VENTILATION
EC-1333
[VK45DE]
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Revision: 2004 November 2004 FX35/FX45
PCV VALVE VENTILATION HOSE
1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any hose
cannot be freed of obstructions, replace.
S-ET277

AIR CLEANER AND AIR DUCT
EM-17
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Revision: 2004 November 2004 FX35/FX45
AIR CLEANER AND AIR DUCTPFP:16500
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).
3. Disconnect mass air flow sensor harness connector.
4. Disconnect PCV hose.
5. Remove air cleaner case/mass air flow sensor assembly and air duct/resonator assembly 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 care.

Do not shock it.

Do not disassemble it.

Do not touch its sensor.
7. Remove resonator in fender, lifting left fender protector.
INSTALLATION
Note to the following, and install in the reverse order of removal.
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

INTAKE MANIFOLD COLLECTOR
EM-19
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Revision: 2004 November 2004 FX35/FX45
INTAKE MANIFOLD COLLECTORPFP:14003
Removal and InstallationABS009RG
REMOVAL
WARNING:

To avoid the danger of being scalded, never drain engine coolant when 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 valve5. 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

INTAKE MANIFOLD COLLECTOR
EM-21
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Revision: 2004 November 2004 FX35/FX45
8. Loosen bolts in reverse order as shown in the figure to remove
intake manifold collector (upper) with power tool.
9. Remove PCV hose [between intake manifold collector and rocker cover (right bank)].
10. Loosen bolts in reverse order as shown in the figure, and
remove intake manifold collector cover, gasket, intake manifold
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 straightedge and 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

ROCKER COVER
EM-51
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Revision: 2004 November 2004 FX35/FX45
ROCKER COVERPFP:13264
Removal and InstallationABS004U9
REMOVAL
1. Remove intake manifold collectors (upper and lower). Refer to EM-19, "INTAKE MANIFOLD COLLEC-
TOR" .
2. Remove ignition coil. Refer to EM-42, "
IGNITION COIL" .
3. Remove PCV hoses from rocker covers.
4. Remove PCV valve and O-ring from rocker cover (right bank), if necessary.
5. Remove oil filler cap from rocker cover (left bank), if necessary.
1. PCV hose 2. Oil filler cap 3. Oil catcher
4. Rocker cover (right bank) 5. PCV control valve 6. O-ring
7. Rocker cover gasket 8. Rocker cover (left bank)
PBIC2303E

ROCKER COVER
EM-53
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Revision: 2004 November 2004 FX35/FX45
4. Tighten bolts two steps separately in order numbers in illustra-
tion.
5. Install oil filer cap to rocker cover (left bank), if removed.
6. Install new O-ring and PCV valve to rocker cover (right bank), if removed.
7. Install PCV hose.

Insert PCV hose by 25 to 30 mm (0.98 to 1.18 in) from connector end.

When installing, be careful not to twist or come in contact with other parts.

Install PCV hose between right and left rocker covers with its identification paint facing upward (right
rocker cover side). Refer to component figure in EM-51, "
Removal and Installation" .
8. Install in the reverse order of removal after this step. 1st step: 1.96 N·m (0.20 kg-m, 17 in-lb)
2nd step: 8.33 N·m (0.85 kg-m, 74 in-lb)
KBIA0985E

EM-172
[VK45DE]
AIR CLEANER AND AIR DUCT
Revision: 2004 November 2004 FX35/FX45
AIR CLEANER AND AIR DUCTPFP:16500
Removal and InstallationABS006IB
REMOVAL
1. Remove engine cover with power tool. Refer to EM-168, "ENGINE ROOM COVER" .
2. Disconnect harness connector from mass air flow sensor.
3. Disconnect vacuum hose and PCV hose.
4. Remove air duct (inlet), air cleaner case and mass air flow sensor assembly, air duct and resonator
assembly disconnecting their joints.

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

Do not shock it.

Do not disassemble it.

Do not touch its sensor.
INSTALLATION
Note to the following, and install in the reverse order of removal.
1. Air duct and resonator assembly 2. Bracket 3. Vacuum hose
4. Mass air flow sensor 5. O-ring 6. Air cleaner case
7. Air cleaner filter 8. Cover 9. Air cleaner case
10. Resonator 11. Mounting rubber 12. Air duct (inlet)
13. Clip
PBIC1657E

EM-174
[VK45DE]
INTAKE MANIFOLD
Revision: 2004 November 2004 FX35/FX45
INTAKE MANIFOLDPFP:14003
Removal and InstallationABS006IC
REMOVAL
WARNING:
To avoid the danger of being scalded, never drain the engine coolant when the engine is hot.
1. PCV tube 2. Engine cover rear bracket 3.EVAP canister purge control sole-
noid valve
4. EVAP hose 5. EVAP tube 6. EVAP hose
7. Vacuum gallery 8. Engine cover front bracket 9. Vacuum tank
10. VIAS control solenoid valve 11. Water gallery 12. Gasket
13. Intake manifold (lower) 14. Gasket 15. Water hose
16. Intake manifold adapter 17. Electric throttle control actuator 18. Gasket
19. Intake manifold (upper) 20. Resonator 21. EVAP service port
PBIC3502E

INTAKE MANIFOLD
EM-175
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Revision: 2004 November 2004 FX35/FX45
1. Remove engine cover with power tool. Refer to EM-168, "ENGINE ROOM COVER" .
2. Release fuel pressure. Refer to EC-700, "
FUEL PRESSURE RELEASE" .
3. Drain engine coolant. Refer to CO-36, "
Changing Engine Coolant" .
4. Remove air duct (inlet), air cleaner case and mass air flow sensor assembly, air duct and resonator
assembly. Refer to EM-172, "
AIR CLEANER AND AIR DUCT" .
5. Disconnect fuel feed hose quick connector on engine side.
Refer to EM-188, "
FUEL INJECTOR AND FUEL TUBE" .
6. Remove fuel damper and fuel hose assembly. Refer to EM-188, "
FUEL INJECTOR AND FUEL TUBE" .
CAUTION:

While hoses are disconnected, plug them to prevent fuel from draining.

Do not separate fuel damper and fuel hose.
7. Remove or disconnect harnesses, brackets, vacuum hose, vacuum gallery and PCV hose and tube from
intake manifold (upper).
8. Remove electric throttle control actuator as follows:
a. Disconnect harness connector.
b. Loosen mounting bolts diagonally.
CAUTION:

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

Do not disassemble.
9. Disconnect water hoses from water gallery.
10. Remove intake manifold adaptor and water gallery.
11. Loosen bolts in reverse order as shown in the figure to remove
intake manifold (upper) with power tool.
12. Remove vacuum tank form intake manifold (lower).
13. Remove fuel injector and fuel tube assembly. Refer to EM-188, "
FUEL INJECTOR AND FUEL TUBE" .
14. Loosen bolts in reverse order as shown in the figure to remove
intake manifold (lower) with power tool.
SBIA0353E
PBIC0014E
PBIC0015E