INFINITI QX56 2011 Factory Service Manual

FUEL INJECTOR AND FUEL TUBEEM-49
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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.
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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.
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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.
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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.
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3 : O-ring (blue)
4: Backup ring
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: 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.
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: Engine front
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B :To high pressure fuel pump
: Engine front
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OIL PAN (LOWER) AND OIL STRAINER
OIL PAN (LOWER) AND OIL STRAINER
Exploded ViewINFOID:0000000006289559
1. Oil level gauge 2. Oil level gauge guide 3. O-ring
4. Oil pressure switch 5. O-ring 6. Oil cooler
7. Oil filter 8. Relief valve 9. Drain plug washer
10. Oil pan (lower) 11. Oil strainer 12. Gasket
13. Oil temperature sensor 14. Baffle plate 15. Rear plate cover
16. Oil pan (upper) 17. O-ring 18. O-ring
19. O-ring
A.Comply with the installation proce-
dure when tightening. Refer to
LU-9,
"Removal and Installation".
: Oil pan side
Refer to GI-4, "
Components" for symbols in the figure.
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OIL PAN (LOWER) AND OIL STRAINEREM-55
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Removal and InstallationINFOID:0000000006289560
REMOVAL
WARNING:
To avoid the danger of being scalded, never
drain engine oil when engine is hot.
1. Drain engine oil. Refer to LU-8, "
Draining".
2. Remove protector A and protector B. Refer to SCS-32, "
FRONT TUBE ASSEMBLY : Exploded View".
3. Remove front suspension rear cross member. Refer to TM-205, "
2WD : Exploded View" (2WD models) or
TM-208, "
4WD : Exploded View" (4WD models).
4. Remove oil pan (lower) as per the following:
a. Loosen mounting bolts in reverse order as shown in the figure to remove.
b. Insert the seal cutter [SST: KV10111100 (J-37228)] (A) between oil pan (upper) and oil pan (lower).
CAUTION:
 Be careful not to damage the mating surfaces.
 Never insert a screwdriver. This damages the mating sur-faces.
c. Slide the seal cutter by tapping on the side of tool with a ham- mer. Remove oil pan (lower).
5. Remove oil strainer.
INSTALLATION
1. Install oil strainer.
2. Install oil pan (lower) as per the following:
a. Use scraper (A) to remove old liquid gasket from mating sur- faces.
 Remove old liquid gasket from the bolt holes and thread.
CAUTION:
Never scratch or damage th e mating surfaces when clean-
ing off old liquid gasket.
: Engine front
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OIL PAN (LOWER) AND OIL STRAINER
b. Apply a continuous bead of liquid gasket with the tube presser(commercial service tool) to the oil pan (lower) as shown in the
figure.
Use Genuine RTV silicone seal ant or equivalent. Refer to
GI-22, "
Recommended Chemical Products and Sealants".
CAUTION:
Attaching must be done with in 5 minutes after coating.
c. Install oil pan (lower).  Tighten mounting bolts in numerical order as shown in the fig-ure.
3. Install oil pan drain plug.  Refer to the figure of the components of on the prior page for installation direction of drain plug washer.Refer to EM-54, "
Exploded View".
4. Install in the reverse order of removal after this step. NOTE:
Wait at least 30 minutes after oil pan is installed before pouring engine oil.
InspectionINFOID:0000000006289561
INSPECTION AFTER REMOVAL
Clean oil strainer if any object is attached.
INSPECTION AFTER INSTALLATION
1. Check the engine oil level and adjust engine oil. Refer to LU-7, "Inspection".
2. Start engine, and check there is no leakage of engine oil.
3. Stop engine and wait for 15 minutes.
4. Check the engine oil level again. Refer to LU-7, "
Inspection".
a : 7.5 - 9.5 mm (0.295 - 0.374 in)
b: φ4.0 - 5.0 mm (0.157 - 0.197 in)
: Engine front
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: Engine front
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OIL PAN (UPPER)EM-57
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OIL PAN (UPPER)
Exploded ViewINFOID:0000000006289562
1. Oil level gauge 2. Oil level gauge guide 3. O-ring
4. Oil pressure switch 5. O-ring 6. Oil cooler
7. Oil filter 8. Relief valve 9. Drain plug washer
10. Oil pan (lower) 11. Oil strainer 12. Gasket
13. Oil temperature sensor 14. Baffle plate 15. Rear plate cover
16. Oil pan (upper) 17. O-ring 18. O-ring
19. O-ring
A.
Comply with the installation proce-
dure when tightening. Refer to
LU-9,
"Removal and Installation".
: Oil pan side
Refer to GI-4, "
Components" for symbols in the figure.
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OIL PAN (UPPER)
Removal and Installation
INFOID:0000000006289563
REMOVAL
WARNING:
To avoid the danger of being scalded, never drain engine oil when engine is hot.
1. Remove oil filter. Refer to LU-9, "
Removal and Installation".
2. Remove oil cooler. Refer to LU-11, "
Exploded View".
3. Move A/C compressor to the position without the hindrance for work. Refer to HA-30, "
Exploded View".
4. Remove oil level gauge and oil level gauge guide.
5. Remove oil pressure switch and oil temperature sensor if necessary.
6. Remove rear plate cover.
7. Remove protector A and protector B. Refer to SCS-32, "
FRONT TUBE ASSEMBLY : Exploded View".
8. Remove front suspension rear cross member. Refer to TM-205, "
2WD : Exploded View" (2WD models) or
TM-208, "
4WD : Exploded View" (4WD models).
9. Remove steering gear assembly. Refer to ST-41, "
Exploded View".
10. Remove front final drive assembly. Refer to DLN-162, "
Exploded View".
11. Remove oil pan (lower). Refer to EM-54, "
Exploded View".
12. Remove oil strainer. Refer to EM-54, "
Exploded View".
13. Remove bolts fixing oil pan (upper) to transmission assembly.
14. Remove oil pan (upper) as per the following:
a. Loosen mounting bolts in the reverse order as shown in the fig- ure with power tool to remove.
NOTE:
Disregard No. 9, 16 when loosening.
b. Insert a suitable tool into the notch at oil pan (upper) (1) as shown.
 Pry off case by moving a suitable tool.
CAUTION:
Be careful not to damage the mating surfaces.
15. Remove O-ring from bottom of cylinder block and oil pump.
16. Remove oil pressure switch and oil temperature sensor, if necessary.
INSTALLATION
1. Install oil pan (upper) as per the following:
: Engine front
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: Engine front
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