2011 INFINITI QX56 engine

ROCKER COVEREM-33
< REMOVAL AND INSTALLATION >
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ROCKER COVER
Exploded ViewINFOID:0000000006289545
Removal and InstallationINFOID:0000000006289546
REMOVAL
1. Remove engine cover and bracket (rear). Refer to
EM-25, "Exploded View".
2. Disconnect PCV hose from rocker cover.
3. Remove air cleaner case (upper) and air duct. Refer to EM-27, "
Exploded View".
4. Move the following parts to the position without the hindrance for work.  Oil level gauge guide. Refer to EM-57, "
Exploded View".
 Power steering fluid reservoir tank bracket. Refer to ST-54, "
Exploded View".
 EVAP canister purge control solenoid valve. EM-30, "
Exploded View".
 Fuel feed hose. Refer to EM-43, "
Exploded View".
5. Remove VVEL actuator motor assembly. Refer to EM-36, "
Exploded View".
6. Remove ignition coil. Refer to EM-29, "
Exploded View".
CAUTION:
Never impact it.
7. Remove rocker cover.
1. Oil filler cap 2. Clamp 3. PCV hose
4. Rocker cover (bank 2) 5. Rocker cover gasket (bank 2) 6. Rocker cover gasket (bank 1)
7. Rocker cover (bank 1) 8. PCV hose 9. O-ring
10. PCV valve 11. Clamp 12. PCV hose
13. PCV valve 14. O-ring
A. To air duct B. To intake manifold C. Comply with the installation proce-
dure when tightening. Refer to
EM-
33, "Removal and Installation".
Refer to GI-4, "
Components" for symbols in the figure.
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EM-34
< REMOVAL AND INSTALLATION >
ROCKER COVER
 Loosen bolts in reverse order shown in the figure.
8. Remove rocker cover gasket from rocker cover.
9. Use scraper to remove all traces of liquid gasket from cylinder head & VVEL ladder assembly.
CAUTION:
Never scratch or damage the mating su rface when cleaning off old liquid gasket.
10. Remove PCV valve from rocker cover, if necessary.
11. Remove oil filler cap from rocker cover, if necessary.
INSTALLATION
1. Apply liquid gasket with the tube presser (commercial service tool) to VVEL ladder assembly (1).
Use Genuine RTV silicone seal ant or equivalent. Refer to
GI-22, "
Recommended Chemical Products and Sealants".
NOTE:
The figure shows an example of bank 1 side.
 Apply liquid gasket on the front and rear side of engine first. [5 mm (0.20 in) + 5 mm (0.20 in) side as shown in the figure]
2. Install rocker cover gasket to rocker cover.
3. Install rocker cover.  Check that rocker cover gasket does not drop fr om the installation groove of rocker cover.
A: Bank 2
B: Bank 1
: Engine front
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A : Liquid gasket application point
F : End surface of VVEL ladder assembly
b : 4.0 mm (0.16 in)
c : 2.5 - 3.5 mm (0.098 - 0.138 in)
d : 5.0 mm (0.20 in)
e : 10.0 mm (0.39 in)
: Engine front
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Revision: 2010 May2011 QX56

ROCKER COVEREM-35
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4. Tighten bolts in two steps separately in numerical order as
shown in the figure.
 Because of the limited working space, use adapter and torquewrench assembly [SST: KV10119300 ( — )] (A) to tighten
bolts (on the No.7 and No. 8 cylinders) to the specified torque.
5. Install ignition coil. Refer to EM-29, "
Exploded View".
CAUTION:
 Install Ignition coil marked with an identification mark (A)
on cylinder No. 5, 6, 7 and 8.
6. Install VVEL actuator motor assembly. Refer to EM-36, "
Exploded View".
7. Install in the reverse order of removal.
A: Bank 2
B: Bank 1
: Engine front
1st step : 2.0 N·m (0.2 kg-m, 18 in-lb)
2nd step : 8.3 N·m (0.85 kg-m, 73 in-lb)
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: Engine front
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: Engine front
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Revision: 2010 May2011 QX56

EM-36
< REMOVAL AND INSTALLATION >
VVEL ACTUATOR ASSEMBLY
VVEL ACTUATOR ASSEMBLY
Exploded ViewINFOID:0000000006289547
Removal and InstallationINFOID:0000000006289548
REMOVAL
1. Remove engine cover. Refer to EM-25, "Exploded View".
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.
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Revision: 2010 May2011 QX56

VVEL ACTUATOR ASSEMBLYEM-37
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2. Loosen mounting bolts (C), and then remove VVEL actuator
motor assembly (1).
CAUTION:
Never loosen screws (A) of VVEL actuator motor assembly.
3. Remove rocker cover. Refer to EM-33, "
Exploded View".
4. Insert mounting bolt (A) removed at step 2 into VVEL actuator housing assembly.
5. Loosen mounting bolt (C) to disengage the control shaft and the actuator arm.
A: Bank 2
B: Bank 1 : Engine front
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Revision: 2010 May2011 QX56

EM-38
< REMOVAL AND INSTALLATION >
VVEL ACTUATOR ASSEMBLY
6. Loosen mounting bolts (C), and then remove VVEL actuator housing assembly.
INSTALLATION
Note the following, and install in the reverse order of removal.
 When disengaging the control shaft (1) and the actuator arm, hold the stopper of the control shaft in the posi-
tion shown in the figure.
A. Bank 1 B. Bank 2
: Engine front
1. VVEL actuator ho using assembly
(bank 1) 2. VVEL actuator housing assembly
(bank 2)
A. Bank 1 B. Bank 2 : Engine front
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A. Bank 1 B. Bank 2 C. View C
: Engine front
Revision: 2010 May2011 QX56

EM-40
< REMOVAL AND INSTALLATION >
EXHAUST MANIFOLD AND THREE WAY CATALYST
EXHAUST MANIFOLD AND THREE WAY CATALYST
Exploded ViewINFOID:0000000006289550
Removal and InstallationINFOID:0000000006289551
REMOVAL
WARNING:
Perform the work when the exhaust and cooling system have cooled sufficiently.
1. Drain engine coolant from radiator. Refer to CO-8, "
Draining".
CAUTION:
 Perform this step when the engine is cold.
 Never spill engine coolant on drive belt.
2. Remove reservoir tank. Refer to CO-13, "
Exploded View".
3. Remove drive belt. Refer to EM-20, "
Removal and Installation".
4. Remove power steering oil pump. Refer to ST-48, "
Exploded View".
5. Remove radiator. Refer to CO-13, "
Exploded View".
6. Remove front under cover. Refer to EXT-25, "
Exploded View".
7. Remove front wheels and tires. Refer to WT-64, "
Exploded View".
8. Remove A/C compressor. Refer to HA-30, "
Exploded View".
9. Remove alternator and alternator bracket. Refer to CHG-25, "
Exploded View".
10. Remove exhaust front tube (bank 1 and bank 2). Refer to EX-5, "
Exploded View".
1. Air fuel ratio sensor 1 (bank 2) 2. Exhaust manifold cover (bank 2) 3. Exhaust manifold and three way cat-
alyst (bank 2)
4. Gasket 5. Exhaust manifold and three way cat-
alyst (bank 1)6. Exhaust manifold cover (bank 1)
7. Air fuel ratio sensor 1 (bank 1)
Refer to GI-4, "
Components" for symbols in the figure.
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Revision: 2010 May2011 QX56

EXHAUST MANIFOLD AND THREE WAY CATALYST
EM-41
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11. Remove front propeller shaft. Refer to
DLN-128, "Exploded View".
12. Disconnect steering lower joint. Refer to ST-37, "
Exploded View".
13. Remove air fuel ratio sensor 1 as per the following: CAUTION:
Air fuel ratio sensor 1 is not reusable. Never remo ve air fuel ratio sensor 1 unless this is required.
 Using the heated oxygen sensor wrench [SST: KV10117100
(J-44626)] (A), remove air fuel ratio sensor 1 (1).
14. Remove exhaust manifold cover.
15. Remove oil level gauge guide. Refer to EM-57, "
Exploded View".
16. Remove exhaust manifold.  Loosen nuts in the reverse order of figure to remove exhaustmanifold with a power tool.
17. Remove exhaust manifold gaskets. CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSTALLATION
Note the following item, and install in the reverse order of removal.
Exhaust Manifold Gasket
 Install exhaust manifold gasket in directional shown in the figure.
NOTE:
When install exhaust manifold gasket, coating surface (black) shall
be located on the exhaust manifold side.
Exhaust Manifold
: Vehicle front
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A : Bank 1
B : Bank 2 : Engine front
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A : Triangle press : Above
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Revision: 2010 May2011 QX56