2008 INFINITI FX35 engine

EM-172
< SERVICE INFORMATION >[VK45DE]
DRIVE BELTS
Drive Belt Auto Tensioner and Idler Pulley
INFOID:0000000001325770
REMOVAL
1. Remove air duct (inlet). Refer to EM-173, "Component".
2. Remove front engine undercover with power tool.
3. Remove drive belts. Refer to EM-170, "
Removal and Installation".
 Keep auto tensioner pulley arm locked after belt is removed.
4. Remove auto tensioner and idler pulley with power tool.  Keep auto tensioner pulley arm locked to install or remove auto tensioner.
CAUTION:
Do not loosen the hexagonal part in center of drive belt auto-tensioner pulley (Do not turn it clock-
wise). If turned clockwise, the complete drive belt auto-tensioner must be replaced as a unit,
including the pulley.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
Do not swap the pulley between new and old drive belt auto-tensioner.
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AIR CLEANER AND AIR DUCTEM-173
< SERVICE INFORMATION > [VK45DE]
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AIR CLEANER AND AIR DUCT
ComponentINFOID:0000000001325771
 Refer to
GI-8, "Component" for symbols in the figure.
Removal and InstallationINFOID:0000000001325772
REMOVAL
1. Remove engine cover with power tool. Refer to EM-169, "Component".
2. Disconnect harness connector from mass air flow sensor.
3. Disconnect vacuum hose and PCV hose.
4. Remove air duct (inlet), power duct, air cleaner case and mass air flow sensor assembly, air duct and res-
onator 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 sen sor with following cares.
 Do not shock it.
 Do not disassemble it.
 Do not touch its sensor.
1. Power duct 2. Blind plug 3. Clip
4. Air duct (inlet) 5. Air cleaner case 6. Mounting rubber
7. Resonator 8. Air cleaner filter 9. Air cleaner case
10. O-ring 11. Mass air flow sensor 12. Air duct and resonator assembly
13. Vacuum hose 14. PCV hose
A. To VIAS control solenoid valve B. To rocker cover (left bank)
PBIC4551E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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INTAKE MANIFOLDEM-175
< SERVICE INFORMATION > [VK45DE]
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INTAKE MANIFOLD
ComponentINFOID:0000000001325774
1. PCV tube 2. PCV hose 3. PCV hose
4. Engine cover bracket (RH) 5.
EVAP canister purge control sole-
noid valve
6. EVAP hose
PBIC4555E
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-176
< SERVICE INFORMATION >[VK45DE]
INTAKE MANIFOLD
 Refer to
GI-8, "Component" for symbols in the figure.
Removal and InstallationINFOID:0000000001325775
REMOVAL
WARNING:
To avoid the danger of being scalded, never drai n the engine coolant when the engine is hot.
1. Remove engine cover with power tool.
2. Release fuel pressure. Refer to EC-665, "
Fuel Pressure Check".
3. Remove air duct (inlet), power duct, air cleaner case and air duct and resonator assembly. Refer to EM-
173, "Component".
4. Drain engine coolant from radiator. Refer to CO-37, "
Changing Engine Coolant".
CAUTION:
 Perform this step when the engine is cold.
 Do not spill engine coolant on drive belts.
7. EVAP service port 8. EVAP tube 9. Vacuum hose
10. Vacuum hose 11. PCV hose 12. PCV tube
13. PCV hose 14. PCV hose 15. Water hose
16. EVAP hose 17. Water hose 18. Intake manifold adapter
19. Gasket 20. Electric throttle control actuator 21. Gasket
22. Gasket 23. Intake manifold (lower) 24. Vacuum hose
25. VIAS control solenoid valve 26. Vacuum hose 27. Vacuum hose
28. Vacuum tank 29. Vacuum hose 30. Engine cover bracket (LH)
31. Vacuum hose 32. Water hose 33. Gasket
34. Intake manifold (upper)
A. To centralized under-floor piping B. To rocker cover (right bank) C. To rocker cover (left bank)
D. To thermostat housing E. To air duct and resonator assembly F. To heater pipe
PBIC4553E
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INTAKE MANIFOLDEM-177
< SERVICE INFORMATION > [VK45DE]
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5. Disconnect fuel feed hose quick connector on engine side.
Refer to EM-190, "
Component".
6. Remove fuel damper and fuel hose assembly. Refer to EM-190, "
Component".
CAUTION:
 While hoses are disconnected, plug th em to prevent fuel from draining.
 Do not separate fuel damper and fuel hose.
7. Remove or disconnect harnesses, engine cover bra cket (RH and LH), vacuum hose, EVAP tube and hose
and PCV hose and tube from intake manifold (upper).
8. Loosen mounting bolts in reverse order as shown in the figure to remove intake manifold (upper) with power tool.
9. 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.
10. Remove fuel injector and fuel tube assembly. Refer to EM-190, "
Component".
11. Disconnect water hoses from intake manifold adaptor.
12. Loosen mounting bolts in reverse order as shown in the figure to remove intake manifold (lower) with power tool.
13. Remove intake manifold adaptor from intake manifold (lower).
14. Remove intake manifold gaskets. CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion
PBIC4552E
: Engine front
PBIC3297E
: Engine front
PBIC3298E
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EM-178
< SERVICE INFORMATION >[VK45DE]
INTAKE MANIFOLD
 Check the surface distortion of both the intake manifold (upper and
lower) mating surfaces with straightedge and feeler gauge.
 If it exceeds the limit, replac e intake manifolds (lower and/or
upper).
INSTALLATION
Note the following, and install in the reverse order of removal.
Intake Manifold (Lower)
Tighten in numerical order as shown in the figure.
 There are two types of mounting bolts. Refer to the following for locating bolts.
Intake Manifold (Upper)
Tighten in numerical order as shown in the figure.
Electric Throttle Control Actuator
 Install gasket with its directional protrusion set up/downward.
 Tighten mounting bolts of electric throttle cont rol actuator equally and diagonally in several steps.
 After installation perform procedure in "INSPECTION AFTER INSTALLATION".
Water Hose
Insert hose by 27 to 32 mm (1.06 to 1.26 in) from connector end.
Va c u u m H o s e
Refer to EC-684, "Vacuum Hose Drawing".
INSPECTION AFTER INSTALLATION
 Perform the “Throttle Valve Closed Position Learning” when harness connector of electric throttle control
actuator is disconnected. Refer to EC-663, "
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-663, "
Idle Air Volume Learning".
Limit : 0.1 mm (0.004 in)
PBIC0016E
: Engine front
M8
× 90 mm (3.54 in) : 7, 8
M8 × 35 mm (1.38 in) : Except the above
PBIC3298E
: Engine front
PBIC3297E
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EXHAUST MANIFOLD AND THREE WAY CATALYST
EM-179
< SERVICE INFORMATION > [VK45DE]
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EXHAUST MANIFOLD AND THREE WAY CATALYST
ComponentINFOID:0000000001325776
 Refer to
GI-8, "Component" for symbols in the figure.
Removal and InstallationINFOID:0000000001325777
REMOVAL
WARNING:
Perform the work, when the exhaust and cooling system h ave completely cooled down.
1. Remove engine cover with power tool. Refer to EM-169, "
Component".
2. Remove front and rear engine undercovers with power tool.
3. Remove air duct (inlet), air cleaner case and mass air flow sensor assembly, air duct and resonator assembly. Refer to EM-173, "
Component".
4. Remove front cross bar. Refer to FSU-5, "
On-Vehicle Inspection and Service".
5. Drain engine coolant from radiator. Refer to CO-37, "
Changing Engine Coolant".
CAUTION:
 Perform this step when engine is cold.
 Do not spill engine coolant on drive belts.
1. Air fuel ratio sensor 1 (bank 2) 2. Exhaust manifold cover (right bank) 3. Exhaust manifold (right bank)
4. Gasket 5. Exhaust manifold (left bank) 6. Exhaust manifold cover (left bank)
7. Air fuel ratio sensor 1 (bank 1) 8. Three way catalyst cover (right bank) 9. Three way catalyst (right bank)
10. Heated oxygen sensor 2 (bank 2) 11. Gasket 12. Three way catalyst cover (left bank)
13. Heated oxygen sensor 2 (bank 1) 14. Three way catalyst (left bank) 15. Mounting bracket
16. Mounting bracket
A. Protrusion for installation confirma-
tion.
: Above
PBIC4549E
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EXHAUST MANIFOLD AND THREE WAY CATALYST
EM-181
< SERVICE INFORMATION > [VK45DE]
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16. Loosen mounting nuts in reverse order as shown in the figure to
remove exhaust manifold.
NOTE:
Disregard the numerical order No. 9 to 12 in removal.
17. Remove exhaust manifold gaskets. CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion
 Check the surface distortion of the each exhaust manifold flange
mating surface 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 exhaust manifold gasket with its directional protrusion set upward.
Refer to the figure of components on former page. Refer to "Removal and Installation".
Exhaust Manifold
A : Left bank
B : Right bank : Engine front
PBIC3300E
Limit : 0.3 mm (0.012 in)
PBIC1550E
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