2008 INFINITI FX35 check engine

DRIVE BELTSEM-15
< SERVICE INFORMATION > [VQ35DE]
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 When belt is replaced with a new one, adjust it
to value for “New belt” to accommodate for insuffi-
cient adaptability with pulley grooves.
 When deflection or tension of belt being used exceeds “Limit”, adjust it to value for “After adjust-
ment”.
 When checking belt deflection or tension immediately af ter installation, first adjust it to the specified
value. Then, after turning crankshaft two turns or mo re, re-adjust to the specified value to avoid vari-
ation in deflection between pulleys.
 When installing belt, make sure that it is correctly engaged with pulley grooves.
 Keep engine oil, working fl uid and engine coolant away from belt and pulley grooves.
 Do not twist or bend belt excessively.
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-14, "
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-14, "
Checking Drive Belts".
3. Tighten nut (C).
Removal and InstallationINFOID:0000000001429498
REMOVAL
1. Remove front engine undercover with power tool.
2. Remove alternator and power steering oil pump belt. Refer to EM-14, "
Tension Adjustment".
3. Remove A/C compressor belt. Refer to EM-14, "
Tension Adjustment".
CAUTION:
Grease is applied to idler pulley adjusting bol t. 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 cool ant do not adhere to belt and each pulley grooves.
1 : Alternator and power steering oil pump belt
2 : A/C compressor belt
3 : Power steering oil pump
4 : Idler pulley
5 : Alternator
6 : Crankshaft pulley
7: A/C compressor
: 34.8 N·m (3.5 kg-m, 26 ft-lb)
JPBIA0423ZZ
: 34.8 N·m (3.5 kg-m, 26 ft-lb)
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

INTAKE MANIFOLD COLLECTOREM-21
< SERVICE INFORMATION > [VQ35DE]
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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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

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
PBIC0778E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-28
< SERVICE INFORMATION >[VQ35DE]
EXHAUST MANIFOLD AND THREE WAY CATALYST
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 exhaust manifold gasket in direction shown in the figure. (Follow same procedure for both banks.)
Exhaust Manifold
 If stud bolts were removed, install them and tighten to the specifiedtorque 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.
Air Fuel Ratio Sensor 1 and Heated Oxygen Sensor 2
CAUTION: Limit : 0.3 mm (0.012 in)
PBIC1096E
A : Right bank
B : Triangle press
C : Left bank
: Engine front
PBIC4954E
: 14.7 N·m (1.5 kg-m, 11 ft-lb)
PBIC2042E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

OIL PAN AND OIL STRAINEREM-35
< SERVICE INFORMATION > [VQ35DE]
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 Tighten mounting bolts in numerical order as shown in the fig-
ure.
4. Install oil pan drain plug.  Refer to the figure of components of former page for installation direction of drain plug washer. Refer to
EM-30, "
Component (2WD Models)".
5. Install in the reverse order of removal after this step. NOTE:
At least 30 minutes after oil pan is installed, pour engine oil.
INSPECTION AFTER INSTALLATION
1. Check the engine oil level and adjust engine oil. Refer to LU-5, "Inspection".
2. Start engine, and check there is no leak of engine oil.
3. Stop engine and wait for 10 minutes.
4. Check the engine oil level again. Refer to LU-5, "
Inspection".
Component (AWD Models)INFOID:0000000001325718
PBIC0782E
SBIA0567E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

OIL PAN AND OIL STRAINEREM-41
< SERVICE INFORMATION > [VQ35DE]
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b. Apply a continuous bead of liquid gasket with the tube presser
(commercial service tool) to the oil pan (lower) as shown in the
figure.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
CAUTION:
Attaching should be done wi thin 5 minutes after coating.
c. Install oil pan (lower).  Tighten mounting bolts in numerical order as shown in the fig-
ure.
5. Install oil pan drain plug.  Refer to the figure of components of former page for installation direction of drain plug washer. Refer toEM-35, "
Component (AWD Models)".
6. Install in the reverse order of removal after this step. NOTE:
At least 30 minutes after oil pan is installed, pour engine oil.
INSPECTION AFTER INSTALLATION
1. Check the engine oil level and adjust engine oil. Refer to LU-5, "Inspection".
2. Start engine, and check there is no leak of engine oil.
3. Stop engine and wait for 10 minutes.
4. Check the engine oil level again. Refer to LU-5, "
Inspection".
PBIC2657E
PBIC0782E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

FUEL INJECTOR AND FUEL TUBEEM-45
< SERVICE INFORMATION > [VQ35DE]
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FUEL INJECTOR AND FUEL TUBE
ComponentINFOID:0000000001325724
CAUTION:
Do not remove or disassemble parts unless
instructed as shown in the figure.
Removal and InstallationINFOID:0000000001325725
REMOVAL
WARNING:
 Put a “CAUTION: FLAMMABLE” sign in the workshop.
 Be sure to work in a well ventilated area and furnish workshop with a CO
2 fire extinguisher.
 Do not smoke while servicing fuel system. Keep open flames and sparks away from the work area.
 To avoid the danger of being scalded, do not drain engine coolant when the engine is hot.
1. Remove engine cover with power tool. Refer to EM-19, "
Component".
2. Release fuel pressure. Refer to EC-87, "
Fuel Pressure Check".
3. Drain engine coolant, or when water hoses are disconnec ted, attach plug to prevent engine coolant leak-
age. Refer to CO-10, "
Changing Engine Coolant" and EM-19, "Component".
CAUTION:
Perform this step when the engine is cold.
1. Fuel damper 2. O-ring 3. Fuel sub-tube
4. EVAP hose 5. Intake manifold collector (lower) 6. Fuel feed hose (with damper)
7. Fuel tube 8. Spacer 9. Clip
10. O-ring (blue) 11. Fuel in jector 12. O-ring (brown)
13. Hose clamp 14. Bracket 15. Quick connector cap
16. Centralized under-floor piping
SBIA0580E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-48
< SERVICE INFORMATION >[VQ35DE]
FUEL INJECTOR AND FUEL TUBE
 Do not clean O-ring with solvent.
 Make sure that O-ring and its mating
part are free of foreign material.
 When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not
to twist or stretch O-ring. If O-ring was stretc hed while it was being attached, do not insert it
quickly into fuel tube.
 Insert new O-ring straight into fuel tube. Do not decenter or twist it.
 Insert fuel damper and fuel sub- tube straight into fuel tube.
 Tighten mounting bolts evenly in turn.
 After tightening mounting bolts, make sure that there is no gap between flange and fuel tube.
2. Install new O-rings to fuel injector, paying attention to the following. CAUTION:
 Upper and lower O-ring are different. Be careful not to confuse them.
 Handle O-ring with bare hands. Do not wear gloves.
 Lubricate O-ring with new engine oil.
 Do not clean O-ring with solvent.
 Make sure that O-ring and its mating part are free of foreign material.
 When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not to
twist or stretch O-ring. If O-ring was stretc hed while it was being attached, do not insert it
quickly into fuel tube.
 Insert O-ring straight into fuel in jector. Do not decenter or twist it.
3. Install fuel injector to fuel tube as follows:
a. Insert clip into clip mounting groove on fuel injector.  Insert clip so that protrusion “A ” of fuel injector matches cutout
“A” of clip.
CAUTION:
 Do not reuse clip. Replace it with a new one.
 Be careful to keep clip from interfering with O-ring. If interference occurs, replace O-ring.
b. Insert fuel injector into fuel tube with clip attached.  Insert it while matching it to the axial center.
 Insert fuel injector so that protrusion “B” of fuel tube matches
cutout “B” of clip.
 Make sure that fuel tube flange is securely fixed in flange fixing groove on clip.
c. Make sure that installation is complete by checking that fuel injector does not rotate or come off.
 Make sure that protrusions of fuel injectors are aligned withcutouts of clips after installation.
4. Install spacers on intake manifold.
5. Install fuel tube and fuel injector assembly to intake manifold. CAUTION:
Be careful not to let tip of injector nozzle come in contact with other parts.
Fuel tube side : Blue
Nozzle side : Brown
PBIC2545E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C