2011 INFINITI QX56 fuel injector

EM-8
< PREPARATION >
PREPARATION
KV10114400
(J-38365)
Heated oxygen sensor wrenchLoosening or tightening heated oxygen sen-
sor 2
a: 22 mm (0.87 in)
KV10117100
(J-44626)
Heated oxygen sensor wrench Loosening or tightening air fuel ratio sensor 1
a: 22 mm (0.87 in)
KV10120100
(J-47245)
Ring gear stopper Removing and installing crankshaft pulley
—
(J-45488)
Quick connector release Removing fuel tube quick connectors in en-
gine room
(Available in SEC. 164 of PARTS CATA-
LOG:Part No. 16441 6N210)
KV10119300
(—)
Adapter and torque wrench assembly Tightening rocker cover mounting bolts.
(specified torque)
KV10119600
(—)
Injector remover Removing fuel injector
Tool number
(Kent-Moore No.)
Tool name
Description
JPBIA0397ZZ
NT379
LBIA0451E
PBIC0198E
JPBIA2623ZZ
JPBIA3746ZZ
Revision: 2010 May2011 QX56

PREPARATIONEM-9
< PREPARATION >
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Commercial Service ToolINFOID:0000000006289519
KV101197S0
(—)
Injector seal drift set
Installing fuel injector seal ring
EG15050500
(J-45402)
Compression gauge adapter Checking compresion pressure
Tool number
(Kent-Moore No.)
Tool name
Description
JPBIA3281ZZ
ZZA1225D
(Kent-Moore No.)
Tool name
Description
(—)
Tube presser Pressing the tube of liquid gasket
(—)
Power tool Loosening nuts and bolts
(—)
Spark plug wrench Removing and installing spark plug
a: 14 mm (0.55 in)
(—)
Manual lift table caddy Removing and installing engine
S-NT052
PBIC0190E
JPBIA0399ZZ
ZZA1210D
Revision: 2010 May2011 QX56

EM-48
< REMOVAL AND INSTALLATION >
FUEL INJECTOR AND FUEL TUBE
FUEL INJECTOR AND FUEL TUBE
Exploded ViewINFOID:0000000006289556
CAUTION:
 Never remove or disassemble parts unless instructed as shown in the figure.
 Be sure to follow the tightening instruction to avoid fuel leakage.
1. Fuel tube insulator (bank 2) 2. Fuel tube insulator (center) 3. Fuel tube insulator (bank 1)
4. High pressure fuel pump 5. Fuel feed tube (pump side) 6. Fuel feed tube (bank side)
7. Fuel rail (bank 2) 8. Injector holder 9. O-ring (blue)
10. Backup ring 11. Fuel injector 12. Seal ring
13. Insulator 14. Fuel rail (bank 1) 15. Gasket
16. Fuel rail pressure sensor
A.Comply with the installation proce-
dure when tightening. Refer to
EM-
49, "Removal and Installation".
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA3506GB
Revision: 2010 May2011 QX56

FUEL INJECTOR AND FUEL TUBEEM-49
< REMOVAL AND INSTALLATION >
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Removal and InstallationINFOID:0000000006289557
REMOVAL
WARNING:
 Be sure to read
EM-4, "
Precaution for Handling High Pressure Fuel System" when working on the
high pressure fuel system.
 Put a “CAUTION: FLAMMABLE” sign in the workshop.
 Be sure to work in a well ventila ted area and furnish workshop with a CO
2 fire extinguisher.
 Never smoke while servicing fuel system. Keep op en flames and sparks away from the work area.
 To avoid the danger of being scalded, never drain engine coolant when engine is hot.
1. Release fuel pressure. Refer to EC-153, "
Work Procedure".
2. Remove intake manifold. Refer to EM-30, "
Removal and Installation".
3. Remove fuel feed tube (pump side) and fuel feed tube (bank side). CAUTION:
Never reuse fuel feed tube.
4. Remove fuel rail (bank 1) and fuel rail (bank 2).
5. Disconnect harness connector from fuel injectors.
6. Remove fuel injector from cylinder head as per the following: CAUTION:
 Be careful with remaining fuel th at may go out from fuel tube.
 Be careful not to damage in jector nozzles during removal.
 Never bump or drop fuel injector.
 Never disassemble fuel injector.
a. Remove injector holder.
b. Install an injector remover [SST: KV10119600 (—)] (A) to the injector connector side so that cutout (B) of injector remover
faces the injector connector side.
 Hook pawl portion (B) of injector remover [SST: KV10119600(—)] (A) to groove portion (C) of injector.
JSBIA0342ZZ
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Revision: 2010 May2011 QX56

EM-50
< REMOVAL AND INSTALLATION >
FUEL INJECTOR AND FUEL TUBE
c. Press down body portion (A) of injector remover [SST:KV10119600 (—)] until it contacts cylinder head.
d. Tighten injector remover [SST: KV10119600 (—)] clockwise and remove injector from cylinder head.
e. Cut Teflon seal (1) while pinching it. Be careful not to damage injector.
f. Remove insulator from mounting ho le of fuel injector of cylinder
head.
INSTALLATION
1. Install seal ring to fuel injector as per the following: CAUTION:
 Handle seal ring with bare hands. Never wear gloves.
 Never apply engine oil to seal ring.
 Never clean seal ring with solvent.
JPBIA3747ZZ
JPBIA3748ZZ
JSBIA0346ZZ
Revision: 2010 May2011 QX56

FUEL INJECTOR AND FUEL TUBEEM-51
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a. Install an injector seal drift set [SST: KV101197S0 (—)] (A) to
fuel injector (1).
b. Set seal ring (1) to injector seal drift set [SST: KV101197S0 (—)]
(A).
c. Straightly insert seal ring (1), which is set in step 2, to fuel injec- tor as shown in the figure and install.
CAUTION:
Be careful that seal ring do es not exceed the groove portion
of fuel injector.
d. Insert injector seal drift set [SST: KV101197S0 (—)] (A) to injec- tor and rotate clockwise and counterclockwise by 90 ° while
pressing seal ring to fit it.
NOTE:
Compress seal ring, because this operation is for rectifying
stretch of seal ring caused by installation and for preventing
sticking when inserting injector into cylinder head.
2. Install O-ring and backup ring to fuel injector. When handing new O-ring and backup ring, paying attention to the following caution items:
CAUTION:
 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 pa rt 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 wh ile it was being attached, never insert it quickly
into fuel tube.
 Insert new O-ring straight into fu el rail. Never decenter or twist it.
JSBIA0347ZZ
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JSBIA0350ZZ
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EM-52
< REMOVAL AND INSTALLATION >
FUEL INJECTOR AND FUEL TUBE
 Always install the back up ring (1) in the right direction as
instructed.
3. Install fuel injector (1) to fuel rail (2) as per the following:
a. Install fuel injector holder (5) to fuel injector. CAUTION:
 Never reuse injector holder. Replace it with a new one.
 Be careful to keep fuel inject or holder from interfering
with O-ring. If interfer ence occurs, replace O-ring.
b. Insert fuel injector into fuel rail with fuel injector holder attached.  Insert it while matching it to the axial center.
 Insert so that protrusion (A) of fuel injector is aligned to cutout
(B).
c. Check that installation is complete by checking that fuel injector does not rotate or come off.
 Check that protrusions of fuel in jectors and fuel rail are aligned
with cutouts of clips after installation.
4. Insert insulator into mounting hole of fuel injector of cylinder head.
5. Install fuel rail and fuel injector assembly to cylinder head.  Tighten mounting bolts and nuts in two steps in numericalorder as shown in the figure.
6. Connect injector harness connector.
7. Install fuel feed tube (bank side) to fuel rail. CAUTION:
 When inserting fuel feed tube (b ank side) to fuel rail, press the flange part to install the tube.
 Never use O-ring with any scoring.
 Never reuse fuel feed tube (ban k side), O-ring and back up ring.
JPBIA3864ZZ
3 : O-ring (blue)
4: Backup ring
JSBIA0352ZZ
: Engine front
1st step : 10.0 N·m (1.0 kg-m, 89 in-lb)
2nd step : 20.5 N·m (2.1 kg-m, 15 ft-lb)
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FUEL INJECTOR AND FUEL TUBEEM-53
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 Apply engine oil to O-ring.
 Tighten mounting bolts in numerical order as shown in the fig-
ure.
8. Install fuel feed tube (pump side) to fuel feed tube (bank side) as per the following:
CAUTION:
Never reuse fuel feed tube (pump side).
a. Apply engine oil to flare screw parts of high pr essure pump side and fuel feed tube (bank side) side.
b. Manually tighten 2 flare nuts without using a t ool until they are seated to screw thread.
c. Tighten mounting bolt (A).
d. Tighten flare nuts in numerical order as shown in the figure.
9. Install in the reverse order of removal.
InspectionINFOID:0000000006289558
INSPECTION AFTER INSTALLATION
Check for Fuel Leakage
1. Turn ignition switch “ON” (with the engine stopped). With fuel pressure applied to fuel piping, check that
there is 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 is no fuel leakage at connection
points.
CAUTION:
Never touch the engine immediately after it is stopped because the engine is extremely hot.
JPBIA3924ZZ
: Engine front
JSBIA0355ZZ
B :To high pressure fuel pump
: Engine front
JSBIA0356ZZ
Revision: 2010 May2011 QX56