Nissan Pathfinder. Manual - part 552

FUEL INJECTOR AND FUEL TUBE

EM-47

< REMOVAL AND INSTALLATION >

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FUEL INJECTOR AND FUEL TUBE

Exploded View

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Removal and Installation

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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.

• Do not drain engine coolant when engine is hot to avoid the danger of being scalded.

CAUTION:

Do not remove or disassemble parts unless instructed.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.
1. Remove engine room cover. Refer to 

EM-23, "Removal and Installation"

.

2. Release the fuel pressure. Refer to 

EC-151, "Work Procedure"

.

3. Disconnect the battery negative terminal. Refer to 

PG-90, "Exploded View"

.

4. Remove intake manifold collector. Refer to 

EM-26, "Removal and Installation"

.

1.

Fuel feed hose

2.

Quick connector cap

3.

Fuel tube

4.

O-ring

5.

Fuel damper

6.

Fuel damper cap

7.

Clip

8.

O-ring (black)

9.

Fuel injector

10. O-ring (green)

A.

Refer to installation

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EM-48

< REMOVAL AND INSTALLATION >

FUEL INJECTOR AND FUEL TUBE

5. When separating fuel feed hose and fuel tube connection, disconnect quick connector using Tool as fol-

lows:

a. Remove quick connector cap from quick connector.
b. Disconnect quick connector from fuel tube as follows:

CAUTION:

Disconnect quick connector by using the Tool, not by prying out retainer tabs.

i.

With the sleeve side of Tool facing toward the quick connector, install the Tool onto fuel tube.

ii.

Insert the Tool (A) into quick connector (2) until sleeve (B) con-

tacts and goes no further. Hold Tool in that position.

CAUTION:

Inserting Tool with excess force 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 fuel tube (1).

CAUTION:

• Pull quick connector (E) holding position (D) as shown.

• 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. Be especially 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.

• To keep the connecting portion clean and to avoid dam-

age and foreign materials, cover them completely with

plastic bags (A) or something similar.

6. Disconnect harness connector from fuel injector.
7. Loosen bolts in reverse order as shown, and remove fuel tube

and fuel injector assembly.

CAUTION:

Do not tilt fuel tube or remaining fuel in pipes may flow out

from pipes.

8. Remove fuel injector from fuel tube as follows:

Tool number

: 16441 6N210 (J-45488)

(C)

: Insert and retain

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: Engine front

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FUEL INJECTOR AND FUEL TUBE

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a. Open and remove clip (1).

b. Remove fuel injector (2) from fuel tube (5) by pulling straight.

CAUTION:

• Be careful or the remaining fuel in the fuel tube may spill. 

• Be careful not to damage injector nozzle during removal.

• Do not bump or drop fuel injector.

• Do not disassemble fuel injector.

• Do not reuse O-rings.

9. Remove fuel damper from fuel tube.

INSTALLATION

1. Install fuel damper as follows:
a. Install new O-ring (2) to fuel tube (1) as shown. When handling

new O-ring, be careful of the following caution:

CAUTION:

• Do not reuse O-rings.

• Handle O-ring with bare hands. Do not wear gloves.

• Lubricate O-ring with new engine oil.

• Do not clean O-ring with solvent.

• Check that O-ring and its mating part are free of foreign

material.

• When installing O-ring, be careful not to scratch, nick or

damage it. Also be careful not to twist or stretch O-ring. 

• Insert new O-ring straight into fuel tube. Be sure O-ring is

centered and not twisted.

b. Install spacer (3) to fuel damper (4).
c. Insert fuel damper straight into fuel tube.

CAUTION:

• Insert fuel damper until (B) is touching (A) of fuel tube.

• Insert straight, checking that the axis is lined up.

• Do not pressure-fit with excessive force.

d. Tighten bolts evenly in turn.

• After tightening bolts, check that there is no gap between fuel

damper cap (5) and fuel tube.

2. Install new O-rings to fuel injector paying attention to the following.

CAUTION:

• Do not reuse O-rings.

• Upper and lower O-ring are different. Be careful to install them in the correct location.

• Handle O-ring with bare hands. Do not wear gloves.

• Lubricate O-ring with new engine oil.

• Do not clean O-ring with solvent.

• Check that O-ring and its mating part are free of foreign material.

• When installing O-ring, be careful not to scratch or nick it. Also be careful not to twist or stretch

O-ring. 

• Insert O-ring straight into fuel injector. Be sure that the O-ring is centered and not twisted. 

3. Install fuel injector to fuel tube as follows:

(3)

: O-ring (green)

(4)

: O-ring (black)

(A)

: Installed condition

(B)

: Clip mounting groove

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Reference value

: 130 N (13.3 kg, 29.2 lb)

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< REMOVAL AND INSTALLATION >

FUEL INJECTOR AND FUEL TUBE

a. Insert clip (3) into clip groove (F) on fuel injector (5).

• Insert clip so that protrusion (E) of fuel injector matches cutout

(C) of clip.

CAUTION:

• Do not reuse clip. Replace it with new one.

• Be careful to keep clip from interfering with O-ring. If

interference occurs, replace O-ring.

• Do not reuse O-rings.

b. Insert fuel injector into fuel tube (1) with clip attached.

• Insert it while matching it to the axial center.

• Insert fuel injector so that protrusion (A) of fuel tube matches

cutout (B) of clip.

• Check that fuel tube flange (G) is securely fixed in flange

groove (D) on clip.

CAUTION:

Do not pressure-fit with excessive force.

c.

Check that installation is complete by checking that fuel injector

does not rotate or come off.

• Check that protrusions of fuel injectors and fuel tubes are aligned with cutouts of clips after installation.

4. 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.

• Tighten bolts in two steps in numerical order as shown.

5. Connect fuel injector harness connectors.
6. Install intake manifold collector. Refer to 

EM-26, "Removal and Installation"

.

7. Connect quick connector between fuel feed hose and fuel tube connection with the following procedure:
a. Check no foreign substances are on the fuel tube or quick connector and that they are not damaged. 
b. Apply a light coating of new engine oil around fuel tube from tip end to spool end.
c.

Align center to insert quick connector straightly into fuel tube.

• Insert quick connector (1) to fuel tube until top spool (2) is

completely inside quick connector, and 2nd level spool (3)

exposes right below quick connector.

CAUTION:

• Hold (A) position as shown when inserting fuel tube into

quick connector.

• Carefully align center to avoid inclined insertion to pre-

vent damage to O-ring inside quick connector.

(2)

: O-ring (black)

(4)

: O-ring (green)

Reference value

: 147 N (15.0 kg, 33.0 lb)

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: Engine front

1st step

: 10.1 N·m (1.0 kg-m, 7 ft-lb)

2nd step

: 22.0 N·m (2.2 kg-m, 16 ft-lb)

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(B)

: Installed condition

: Upright insertion

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