2011 INFINITI QX56 sensor

EM-46
< REMOVAL AND INSTALLATION >
HIGH PRESSURE FUEL PUMP AND FUEL HOSE
 Check that rotation stopper (A) of fuel feed hose contact highpressure fuel pump.
6. Tighten mounting bolts that are temporarily tightened in step 3.
7. Connect harness connector to high pressure fuel pump.
8. Install fuel pump connector protector.
9. Connect harness connector to low fuel pressure sensor.
10. Note the following, and connect quick connector to install fuel feed hose.
a. Check the connection for foreign material and damage.
b. Align center to insert quick connector straightly into fuel tube. NOTE:
The figure shows engine side as an example.
 Insert fuel tube into quick connector until the top spool on fueltube is inserted completely and the second level spool is posi-
tioned slightly below quick connector bottom end.
CAUTION:
 Hold “A” position 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 “c lick” sound and actually feel
the engagement.
 To avoid misidentification of engagement with a similar sound , be sure to perform the next
step.
c. Before clamping fuel feed hose with hose clamps, pull quick connector hard by hand holding “A” position.
Check it is completely engaged (connected) so that it does not come out from fuel feed tube.
d. Install quick connector cap to quick connector connection.  Install so that the arrow mark on the side faces up.
CAUTION:
 Check that quick connector and fuel tube are securely fitinto quick connector cap installation groove.
 If quick connector cap canno t be installed smoothly,
quick connector may have not been installed correctly.
Check connection again.
11. Install in the reverse order of removal.
InspectionINFOID:0000000006289555
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.
JSBIA0364ZZ
KBIA0272E
PBIC2348E
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

EM-54
< REMOVAL AND INSTALLATION >
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.
JPBIA3494GB
Revision: 2010 May2011 QX56

OIL PAN (UPPER)EM-57
< REMOVAL AND INSTALLATION >
C
DE
F
G H
I
J
K L
M A
EM
NP
O
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.
JPBIA3494GB
Revision: 2010 May2011 QX56

EM-58
< REMOVAL AND INSTALLATION >
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
JPBIA3502ZZ
: Engine front
JPBIA2299ZZ
Revision: 2010 May2011 QX56

EM-62
< REMOVAL AND INSTALLATION >
TIMING CHAIN
Removal and Installation
INFOID:0000000006289566
REMOVAL
1. Release fuel pressure. Refer to EC-153, "Work Procedure".
2. Drain engine coolant from radiator. Refer to CO-8, "
Draining".
3. Remove fan shroud (lower). Refer to CO-13, "
Exploded View".
4. Remove fan bracket. Refer to CO-16, "
Exploded View".
5. Remove drive belt auto-tensioner. Refer to EM-26, "
Exploded View".
6. Remove oil level gauge and oil level gauge guide. Refer to EM-57, "
Exploded View".
7. Move power steering oil pump to the posit ion without the hindrance for work. Refer to ST-48, "
Exploded
View".
8. Remove alternator, alternator bracket and alternator stay. Refer to CHG-25, "
Exploded View".
9. Move power steering reservoir tank to the position without the hindrance for work, and then remove Res- ervoir tank bracket. Refer to ST-54, "
Exploded View".
10. Remove camshaft position sensors.
CAUTION:
 Handle carefully to avoid dropping and shocks.
 Never disassemble.
 Never allow metal powder to adhere to magnetic part atsensor tip.
 Never place sensors in a lo cation where they are exposed
to magnetism.
11. Remove high pressure fuel pump and lifter. Refer to EM-43, "
Exploded View".
CAUTION:
After removing lifter, replace lifter with a new one.
12. Remove radiator hose (upper) and radiator hose (lower). Refer to CO-13, "
Exploded View".
13. Remove water suction pipe. Refer to CO-20, "
Exploded View".
14. Remove valve timing control cover as per the following:
a. Disconnect valve timing control solenoid valve harness connector.
10. Slack guide (bank 2) 11. Timing chain tensioner (bank 2) 12. Exhaust camshaft sprocket (bank 1)
13. Timing chain (bank 1) 14. Intake camshaft sprocket (bank 1) 15. Timing chain tensioner (bank 1)
16. Slack guide (bank 1) 17. Tension guide (bank 1) 18. Oil pump
19. Camshaft position sensor (bank 2) 20. O-ring 21. Seal ring
22. Valve timing control cover (bank 2) 23. Intake valve timing control solenoid
valve (bank 2)24. Crankshaft pulley
25. Front oil seal 26. Intake valve timing control solenoid
valve (bank 1)27. Valve timing control cover (bank 1)
28. Timing chain tensioner cover 29. Front cover 30. O-ring
31. Camshaft position sensor (bank 1) 32. Camshaft bracket 33. Oil filter (for valve timing control so-
lenoid valve)
34. Crankshaft sprocket 35. Oil pump drive spacer
A. Comply with the installation proce-
dure when tightening. Refer to
EM-
62, "Removal and Installation".
Refer to GI-4, "
Components" for symbol marks in the figure.
A : Keep free from magnetic materials
JPBIA0454ZZ
Revision: 2010 May2011 QX56

EM-72
< REMOVAL AND INSTALLATION >
TIMING CHAIN
d. Being careful not to move seal ring from the installation groove,align dowel pins on front cover with dowel pin holes (C) to install
valve timing control covers.
e. Tighten mounting bolts in numerical order as shown in the fig- ure.
14. Install camshaft position sensor and valve timing c ontrol solenoid valve (RH and LH) to valve timing con-
trol cover, if removed.
 Be sure to tighten mounting bolts with flanges completely seated.
15. Install oil pan (upper). Refer to EM-57, "
Exploded View".
16. Install oil pan (lower) and oil strainer. Refer to EM-54, "
Exploded View".
17. Install water pump pulley. Refer to CO-18, "
Exploded View".
18. Install crankshaft pulley.  Fix the crankshaft as instructed in the removal procedure. Refer to EM-96, "
FRONT OIL SEAL :
Removal and Installation".
a. Install crankshaft pulley, taking care not to damage front oil seal.
b. Apply engine oil onto threaded parts of crankshaft pulley bolt and seating area.  Lightly tapping its center with plastic hammer, insert crankshaft pulley.
CAUTION:
Never tap crankshaft pulley on the side surface wh ere belt is installed (outer circumference).
c. Tighten crankshaft pulley bolt.
d. Put a paint mark (A) on crankshaft pulley (1) aligning with angle mark (B) on crankshaft pulley bolt.
e. Tighten crankshaft pulley bolt (clockwise).
 Check the tightening angle by referencing to the notches. Theangle between two notches is 90 degrees.
19. Rotate crankshaft pulley in normal direction (clockwise when viewed from engine front) to confirm it turns smoothly.
20. Install in the reverse order of removal.
InspectionINFOID:0000000006289567
INSPECTION AFTER DISASSEMBLY
Timing Chain
A: Bank 2
B: Bank 1
JPBIA3476ZZ
: 205 N·m (21 kg-m, 151 ft-lb)
Angle tightening: 90 degrees (c)
JPBIA2066ZZ
Revision: 2010 May2011 QX56

EM-74
< REMOVAL AND INSTALLATION >
CAMSHAFT
CAMSHAFT
Exploded ViewINFOID:0000000006289568
1.VVEL actuator motor assembly
(bank 2) 2. Gasket 3.
VVEL actuator ho
using assembly
(bank 2)
4. Washer 5. VVEL ladder as sembly (bank 2) 6. Exhaust camshaft (bank 2)
7. Cylinder head (bank 2) 8. Cylinder head (bank 1) 9. Exhaust camshaft (bank 1)
10. VVEL ladder assembly (bank 1) 11. VVEL actuator housing assembly
(bank 1)12. Gasket
13. VVEL actuator motor assembly
(bank 1) 14.
VVEL control shaft
position sensor
(bank 1) 15.
VVEL control shaft
position sensor
(bank 2)
A. Comply with the installation proce-
dure when tightening. Refer to
EM-
75, "Removal and Installation".B. View B C. View C
Refer to GI-4, "
Components" for symbols in the figure.
JSBIA0403GB
Revision: 2010 May2011 QX56