2008 INFINITI FX35 service

EM-46
< SERVICE INFORMATION >[VQ35DE]
FUEL INJECTOR AND FUEL TUBE
4. Remove fuel feed hose (wit
h damper) from fuel sub-tube.
NOTE:
There is no fuel return route.
CAUTION:
 While hoses are disconnected, plug them to prevent fuel
from draining.
 Do not separate damper and hose.
5. When separating fuel feed hose (with damper) and centralized under-floor piping connection, disconnect
quick connector as the following:
a. Remove quick connector cap from quick connector connection on right member side.
b. Disconnect fuel feed hose (with damper) from bracket hose clamp.
c. Disconnect quick connector from centralized under-floor piping as follows: CAUTION:
Disconnect quick connector by using quick conn ector release [SST: — (J-45488)], not by picking
out retainer tabs.
i. With the sleeve side of quick connector release facing quick connector, install quick connector release
onto centralized under-floor piping.
ii. Insert quick connector release into quick connector until sleeve contacts and goes no further. Hold quick connector release on
that position.
CAUTION:
Inserting quick connector re lease hard will not disconnect
quick connector. Hold qui ck connector release where it
contacts and goes no further.
iii. Draw and pull out quick connector straight from centralized under-floor piping.
CAUTION:
 Pull quick connector holding “A” position as shown in thefigure.
 Do not pull with lateral force applied. O-ring inside quick connector may be damaged.
 Prepare container and cloth beforehand as fuel will leak out.
 Avoid fire and sparks.
 Keep parts away from heat source. Especially, be careful when welding is performed around
them.
 Do not expose parts to battery electrolyte or other acids.
 Do not bend or twist connection between quick connector and fuel feed hose (with damper) dur-
ing installation/removal.
KBIA1293E
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3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

FUEL INJECTOR AND FUEL TUBEEM-47
< SERVICE INFORMATION > [VQ35DE]
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 To keep clean the connecting portion and to avoid dam-
age and foreign materials, cover them completely with
plastic bags or something similar.
6. Remove intake manifold collectors (upper and lower). Refer to EM-19, "
Component".
7. Disconnect harness connector from fuel injector.
8. Loosen mounting bolts in reverse order as shown in the figure, and remove fuel tube and fuel injector assembly.
CAUTION:
Do not tilt it, or remaining fu el in pipes may flow out from
pipes.
9. Remove spacers on intake manifold.
10. Remove fuel injector from fuel tube as follows:
a. Open and remove clip.
b. Remove fuel injector from fuel tube by pulling straight. CAUTION:
 Be careful with remaining fuel that may go out from fuel
tube.
 Be careful not to damage in jector nozzles during removal.
 Do not bump or drop fuel injector.
 Do not disassemble fuel injector.
11. Remove fuel sub-tube and fuel damper.
INSTALLATION
1. Install fuel damper and fuel sub-tube.  When handling new O-rings, be careful of the following caution:CAUTION:
 Handle O-ring with bare hands. Do not wear gloves.
 Lubricate O-ring with new engine oil.
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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

FUEL INJECTOR AND FUEL TUBEEM-49
< SERVICE INFORMATION > [VQ35DE]
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 Tighten mounting bolts in two steps in numerical order as
shown in the figure.
6. Connect injector sub-harness.
7. Install intake manifold collectors (upper and lower). Refer to EM-19, "
Component".
8. Install fuel sub-tube on rear end of intake manifold collector (lower).
9. Connect fuel feed hose (with damper).  Handling procedure of O-ring is the same as that of fuel damper and fuel sub-tube.
 Insert fuel damper straight into fuel sub-tube.
 Tighten mounting bolts evenly in turn.
 After tightening mounting bolts, make sure t hat there is no gap between flange and fuel sub-tube.
10. Connect quick connector between fuel feed hose ( with damper) and centralized under-floor piping con-
nection as follows:
a. Make sure no foreign substances are deposited in and around centralized under-floor piping and quick connector, and no damage on them.
b. Thinly apply new engine oil around centralized under-floor piping from tip end to spool end.
c. Align center to insert quick connector st raightly into centralized under-floor piping.
 Insert quick connector to centralized under-floor piping until top spool is completely inside quick connector, and 2nd level
spool exposes right below quick connector.
CAUTION:
 Hold “A” position as shown in the figure when inserting
centralized under-floor pipi ng into quick connector.
 Carefully align center to avoid inclined insertion to pre-
vent damage to O-ring inside quick connector.
 Insert until you hear a “click” sound and actually feel the
engagement.
 To avoid misidentification of engagement with a similar sound, be sure to perform the next step.
d. Pull quick connector by hand holding “A” position. Make sure it is completely engaged (connected) so that
it does not come out from centralized under-floor piping.
e. Install quick connector cap to quick connector connection.  Install quick connector cap with arrow on surface facing indirection of quick connector (fuel feed hose side).
CAUTION:
If quick connector cap cannot be installed smoothly, quick
connector may have not been installed correctly. Check the
connection again.
11. Install in the reverse order of removal after this step.
INSPECTION AFTER INSTALLATION
Check on Fuel Leakage
1. Turn ignition switch “ON” (with the engine stopped). With fuel pressure applied to fuel piping, make sure there are no fuel leaks at connection points. 1st step : 10.1 N·m (1.0 kg-m, 7 ft-lb)
2nd step : 23.6 N·m (2.4 kg-m, 17 ft-lb)
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3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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EM-50
< SERVICE INFORMATION >[VQ35DE]
FUEL INJECTOR AND FUEL TUBE
NOTE:
Use mirrors for checking at points out of clear sight.
2. Start the engine. With engine speed increased, make su re again that there are no fuel leaks at connection
points.
CAUTION:
Do not touch the engine immediately after st opped, as the engine becomes extremely hot.
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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ROCKER COVEREM-51
< SERVICE INFORMATION > [VQ35DE]
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ROCKER COVER
ComponentINFOID:0000000001325726
Removal and InstallationINFOID:0000000001325727
REMOVAL
1. Remove engine cover with power tool. Refer to
EM-19, "Component".
2. Release the 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.
4. Remove intake manifold collectors (upper and lower). Refer to EM-19, "
Component".
5. Separate engine harness removing thei r brackets from rocker covers.
6. Remove ignition coil. Refer to EM-42, "
Component".
7. Remove PCV hoses from rocker covers.
8. Remove PCV valve and O-ring from rocker cover (right bank), if necessary.
9. Remove oil filler cap and oil catcher 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)
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3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-52
< SERVICE INFORMATION >[VQ35DE]
ROCKER COVER
10. Loosen mounting bolts with power tool in reverse order as
shown in the figure.
11. Remove rocker cover gaskets from rocker covers.
12. Use a scraper to remove all trances of liquid gasket from cylinder head and camshaft bracket (No. 1). CAUTION:
Do not scratch or damage the mating su rface when cleaning off old liquid gasket.
INSTALLATION
1. Apply liquid gasket with the tube presser (commercial service
tool) to joint part among rocker cover, cylinder head and cam-
shaft bracket (No. 1) as follows:
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
NOTE:
The figure shows an example of left bank side [zoomed in shows
camshaft bracket (No. 1)].
a. Refer to the figure “a” to apply liquid gasket to joint part of cam- shaft bracket (No. 1) and cylinder head.
b. Refer to the figure “b” to apply liquid gasket to the figure “a” squarely.
2. Install new rocker cover gasket to rocker cover.
3. Install rocker cover.  Check if rocker cover gasket is not dropped from installation groove of rocker cover.
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3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

ROCKER COVEREM-53
< SERVICE INFORMATION > [VQ35DE]
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4. Tighten bolts in two steps separately in numerical order as
shown in the figure.
5. Install oil catcher and 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 (rightrocker cover side). Refer to component figure in "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
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