Nissan Murano. Manual - part 619

EM-50

< REMOVAL AND INSTALLATION >

FUEL INJECTOR AND FUEL TUBE

1.

Remove radiator core support covers (RH and LH), air duct (inlet), air cleaner cases (upper and lower)
with mass air flow sensor and air duct assembly. Refer to 

EM-31, "Exploded View"

.

2.

Remove engine cover. Refer to 

EM-29, "Exploded View"

.

3.

Release the fuel pressure. Refer to 

EC-532, "Inspection"

.

4.

Remove front wiper arm and extension cowl top. Refer to 

WW-134, "Exploded View"

 and 

EXT-23,

"Exploded View"

.

5.

Drain engine coolant, or when water hoses are disconnected, attach plug to prevent engine coolant leak-
age. Refer to 

CO-11, "Draining"

 or 

EM-33, "Exploded View"

.

CAUTION:

Perform this step when the engine is cold.

6.

Remove intake manifold collector. Refer to 

EM-33, "Exploded View"

.

7.

When separating fuel feed hose and fuel tube connection, disconnect quick connector as follows:

a.

Remove quick connector cap from quick connector.

b.

Disconnect quick connector from fuel tube as follows:

CAUTION:

Disconnect quick connector by using the quick connector release (commercial service tool: J-
45488), not by picking out retainer tabs.

i.

With the sleeve side of quick connector release facing to quick connector, install the quick connector
release onto fuel tube.

ii.

Insert the quick connector release (A) into quick connector (2)
until sleeve (B) contacts and goes no further. Hold quick connec-
tor 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 fuel tube (1).

CAUTION:

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

the figure.

• Never pull with lateral force applied. O-ring inside quick connector may be damaged.
• Prepare container and cloth beforehand as fuel will leakage out.
• Avoid fire and sparks.
• Keep parts away from heat source. Especially, be careful when welding is performed around

them.

• Never expose parts to battery electrolyte or other acids.
• Never bend or twist connection between quick connector and fuel feed hose (with damper) dur-

ing installation/removal.

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

age and foreign materials, cover them completely with
plastic bags, etc. (A) or something similar.

8.

Disconnect harness connector from fuel injector.

C

: Insert and retain

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FUEL INJECTOR AND FUEL TUBE

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9.

Loosen mounting bolts in the reverse order as shown in the fig-
ure, and remove fuel tube and fuel injector assembly.

CAUTION:

Never tilt fuel tube, or remaining fuel in pipes may flow out
from pipes.

10. Remove fuel injector from fuel tube as follows:
a.

Open and remove clip (1).

b.

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

CAUTION:

• Be careful with remaining fuel that may go out from fuel

tube.

• Be careful not to damage injector nozzle during removal.
• Never bump or drop fuel injector.
• Never disassemble fuel injector.

11. Remove fuel damper from fuel tube.

INSTALLATION

CAUTION:

Do not reuse O-rings.
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. Never wear gloves.
• Lubricate O-ring with new engine oil.
• Never 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 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, never insert it quickly into fuel tube.

• Insert new O-ring straight into fuel tube. Never twist it.

b.

Install spacer (3) to fuel damper (4).

c.

Insert fuel damper straight into fuel tube.

CAUTION:

• Insert straight, checking that the axis is lined up.
• Never pressure-fit with excessive force.

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

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.

: Engine front

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: 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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EM-52

< REMOVAL AND INSTALLATION >

FUEL INJECTOR AND FUEL TUBE

CAUTION:

• Do not reuse O-rings.
• Upper and lower O-ring are different. Be careful not to confuse them.

• Handle O-ring with bare hands. Never wear gloves.
• Lubricate O-ring with new engine oil.
• Never 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 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, never insert it quickly
into fuel tube.

• Insert O-ring straight into fuel injector. Never decenter or twist it.

3.

Install fuel injector to fuel tube as follows:

a.

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

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

(C) of clip.

CAUTION:

• Do not reuse O-rings.
• Never reuse clip. Replace it with 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 (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 fixing

groove (D) on clip.

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 mounting bolts in two steps in numerical order as

shown in the figure.

5.

Connect fuel injector harness.

6.

Install intake manifold collector. Refer to 

EM-33, "Exploded View"

.

7.

Connect quick connector between fuel feed hose and fuel tube connection with the following procedure:

Fuel tube side

: Black

Nozzle side

: Green

2

: O-ring (black)

4

: O-ring (green)

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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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FUEL INJECTOR AND FUEL TUBE

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a.

Check no foreign substances are deposited in and around fuel tube and quick connector, and no damage
on them.

b.

Thinly apply 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 in the figure when inserting

fuel tube 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 position. Check it is completely engaged (connected) so that it does
not come out from fuel tube.

e.

Install quick connector cap (3) to quick connector.

• Install quick connector cap with arrow (A) on surface facing in

direction 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
connection again.

f.

Secure fuel feed hose to clamp of quick connector cap.

8.

Install in the reverse order of removal after this step.

Inspection

INFOID:0000000009717979

INSPECTION AFTER INSTALLATION

Check on Fuel Leakage

1.

Turn ignition switch “ON” (with the engine stopped). With fuel pressure applied to fuel piping, check there
are no fuel leakage at connection points.
NOTE:
Use mirrors for checking at points out of clear sight.

2.

Start the engine. With engine speed increased, check again that there are no fuel leakage at connection
points.

CAUTION:

Never touch the engine immediately after stopped, as the engine becomes extremely hot.

B

: Fitted condition

: Upright insertion

1

: Fuel feed hose

2

: Fuel tube

B

: Upper view

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