Infiniti FX35 / FX45. Manual - part 632

FUEL INJECTOR AND FUEL TUBE

EM-45

< SERVICE INFORMATION >

[VQ35DE]

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FUEL INJECTOR AND FUEL TUBE

Component

INFOID:0000000001325724

CAUTION:

Do not remove or disassemble parts unless instructed as shown in the figure.

Removal and Installation

INFOID: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 disconnected, 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 injector

12. O-ring (brown)

13. Hose clamp

14. Bracket

15. Quick connector cap

16. Centralized under-floor piping

SBIA0580E

EM-46

< SERVICE INFORMATION >

[VQ35DE]

FUEL INJECTOR AND FUEL TUBE

4.

Remove fuel feed hose (with 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 connector 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 release hard will not disconnect
quick connector. Hold quick 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 the

figure.

• 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

PBIC2083E

PBIC1898E

FUEL INJECTOR AND FUEL TUBE

EM-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 fuel 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 injector 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.

PBIC1899E

KBIA1296E

PBIC2470E

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 stretched 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 stretched while it was being attached, do not insert it
quickly into fuel tube.

• Insert O-ring straight into fuel injector. 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 with

cutouts 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