2011 INFINITI QX56 check oil

EM-70
< REMOVAL AND INSTALLATION >
TIMING CHAIN
b. Apply a continuous bead of liquid gasket with tube presser(commercial service tool) to front cover as shown in the figure.
Use Genuine RTV silicone seal ant or equivalent. Refer to
GI-22, "
Recommended Chemical Products and Sealants".
c. Check again that the matching marks on timing chain and that on each sprocket are aligned. Then, install front cover.
CAUTION:
Be careful not to damage front oil seal by interference with
front end of crankshaft.
d. Tighten mounting bolts in numerical order as shown in the fig- ure.
 There are three types of mounting bolts.
e. After all mounting bolts are tightened, retighten t hem in numerical order as shown in the figure.
CAUTION:
Be sure to wipe out any excessive liquid gasket leaking onto surface mating with oil pan.
13. Install valve timing control cover as per the following:
A : Junction between cylinder block and cylinder head
B : Protrusion
c : 4.3 - 5.3 mm (0.169 - 0.209 in)
d: φ3.4 - 4.4 mm (0.134 - 0.173 in)
e: φ4.0 - 5.6 mm (0.157 - 0.220 in)
f: φ4.8 - 5.8 mm (0.189 - 0.228 in)
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A : 0.79 in (0.79 in)
B : 1.77 in (1.77 in)
C : 3.15 in (3.15 in)
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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
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: 205 N·m (21 kg-m, 151 ft-lb)
Angle tightening: 90 degrees (c)
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Revision: 2010 May2011 QX56

TIMING CHAINEM-73
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Check for cracks and any excessive
wear at link plates and roller
links of timing chain. Replace timing chain if necessary.
INSPECTION AFTER ASSEMBLY
Inspection for Leakage
The following are procedures for chec king fluid leakage, lubricant leakage. Before starting engine, check oil/fluid levels including engine coolant and engine oil. If any are less than the
required quantity, fill them to the specified level. Refer to MA-10, "
Fluids and Lubricants".
 Follow the procedure below to check for fuel leakage.
- Turn ignition switch to the “ON” position (with engi ne stopped). With fuel pressure applied to fuel piping,
check for fuel leakage at connection points.
- Start engine. With engine speed increased, check again for fuel leakage at connection points.
 Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after the engine start. However, this does not indicate a malfunction. The
noise will stop after hydraulic pressure rises.
 Warm up engine thoroughly to check that there is no leak age of fuel, or any oil/fluids including engine oil and
engine coolant.
 Bleed air from lines and hoses of applicable lines, such as in cooling system.
 After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill them to the specified level, if necessary.
Summary of the inspection items:
* Power steering fluid, brake fluid, etc. A: Crack
B: Wear
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Items Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Transmission /
transaxle fluid AT & CVT Models Leakage Level / Leakage Leakage
MT Models Level / Leakage Leakage Level / Leakage
Other oils and fluids* Level Leakage Level
Fuel Leakage Leakage Leakage
Revision: 2010 May2011 QX56

EM-84
< REMOVAL AND INSTALLATION >
CAMSHAFT
 Move control shaft (A) to the small stopper and large stopper tocheck that the control shaft functions smoothly.
CAUTION:
Turn VVEL ladder assembly upside down to prevent the drive
shaft from dropping off.
RINK CHECK FOR BACK-LASH (BONDING) Check that the link and the shaft of drive shaft and control shaft are
not fixed.
 Check this by moving drive shaft and control shaft in the axial and
rotation directions.
 If there is an unusualness related to the above three items, replace VVEL ladder assembly & cylinder head
assembly.
NOTE:
VVEL ladder assembly cannot be replaced as a singl e part, because it is machined together with cylinder
head assembly.
INSPECTION AFTER ASSEMBLY
Inspection of Camshaft Sprocket (INT) Oil Groove
CAUTION:
 Perform this inspection only when DTC P0011, P 0021 are detected in self-diagnostic results of CON-
SULT-III and it is directed according to inspection procedure of EC section. Refer to EC-177, "
DTC
Logic".
 Check when engine is cold to prevent burns from the splashing engine oil.
1. Check engine oil level. Refer to LU-7, "
Inspection".
2. Perform the following procedure to prevent the engine from being unintentionally started while checking.
a. Release the fuel pressure. Refer to EC-153, "
Work Procedure".
b. Disconnect ignition coil and injector harness connectors.
3. Remove valve timing control solenoid valve. Refer to EM-61, "
Exploded View".
4. Crank engine, and then check that engine oil comes out from valve timing control solenoid valve hole (A). End crank after
checking.
WARNING:
Be careful not to touch rotati ng parts (drive belt, idler pul-
ley, and crankshaft pulley, etc.).
CAUTION:
 Prevent splashing by using a shop cloth to prevent the worker from injury from en gine oil and to prevent engine
oil contamination.
 Prevent splashing by using a shop cloth to prevent engine oil from being splashed to engine and
vehicle. Especially, be careful not to apply engine oil to rubber parts of drive belt, engine mount-
ing insulator, etc. Wipe engine oil out immediately if it is splashed.
: Engine front
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1 : Valve timing control cover (bank 2)
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Revision: 2010 May2011 QX56

CAMSHAFTEM-85
< REMOVAL AND INSTALLATION >
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5. Perform the following inspection if engine oil does not
come out from valve timing control solenoid valve
oil hole of the valve timing control cover.
 Remove oil filter, and then clean it. Refer to EM-61, "
Exploded View".
 Clean oil groove between oil strainer and valve timing control solenoid valve. Refer to LU-5, "
Engine
Lubrication System" and LU-6, "Engine Lubrication System Schematic".
6. Remove components between valve timing control solenoid valve and camshaft sprocket, and then check each oil groove for clogging.
 Clean oil groove if necessary. Refer to LU-5, "
Engine Lubrication System" and LU-6, "Engine Lubrica-
tion System Schematic".
7. After inspection, install removed parts in the reverse order.
Inspection for Leakage
The following are procedures for chec king fluid leakage, lubricant leakage.
 Before starting engine, check oil/fluid levels including engine coolant and engine oil. If any are less than the
required quantity, fill them to the specified level. Refer to MA-10, "
Fluids and Lubricants".
 Follow the procedure below to check for fuel leakage.
- Turn ignition switch to the “ON” position (with engi ne stopped). With fuel pressure applied to fuel piping,
check for fuel leakage at connection points.
- Start engine. With engine speed increased, check again for fuel leakage at connection points.
 Run engine to check for unusual noise and vibration. NOTE:
If hydraulic pressure inside chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after the engine start. However, this does not indicate a malfunction. The
noise will stop after hydraulic pressure rises.
 Warm up engine thoroughly to check that there is no leak age of fuel, or any oil/fluids including engine oil and
engine coolant.
 Bleed air from lines and hoses of applicable lines, such as in cooling system.
 After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill them to
the specified level, if necessary.
Summary of the inspection items:
* Power steering fluid, brake fluid, etc. Items Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Transmission /
transaxle fluid AT & CVT Models Leakage Level / Leakage Leakage
MT Models Level / Leakage Leakage Level / Leakage
Other oils and fluids* Level Leakage Level
Fuel Leakage Leakage Leakage
Revision: 2010 May2011 QX56

CYLINDER HEADEM-87
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NOTE:
 As for replacement of parts on the intake side as
shown in the exploded view, replace VVEL ladder assem-
bly & cylinder head assembly. (Only valve oil seals are replaceable as a single part.)
 VVEL ladder assembly cannot be replaced as a singl e part, because it is machined together with cylinder
head assembly.
Removal and InstallationINFOID:0000000006289572
REMOVAL
1. Remove the following parts:  Rocker cover and spark plug: Refer to EM-33, "
Exploded View".
 Intake manifold: Refer to EM-30, "
Exploded View".
 Exhaust manifold: Refer to EM-40, "
Exploded View".
 Water inlet and thermostat housing: Refer to CO-20, "
Exploded View".
 Water pipe and heater pipe: Refer to CO-20, "
Exploded View".
 Timing chain: Refer to EM-61, "
Exploded View".
 Camshaft (EXH) and VVEL ladder assembly: Refer to EM-74, "
Exploded View".
2. Remove cylinder head.  Loosen mounting bolts in reverse order as shown in the figure.
 Use TORX socket and power tool.
3. Remove cylinder head gaskets.
4. Remove oil filter (for VVEL ladder asse mbly) from cylinder block, if necessary.
5. Remove valve lifter.  Identify installation positions, and store them without mixing them up.
INSTALLATION
1. Install oil filter (for VVEL l adder assembly) (1) in the direction
shown in the figure, if removed.
 Check that the oil filter does not protrude from the upper sur-
face of cylinder block (2) after installation.
A: Bank 2
B: Bank 1
: Engine front
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Revision: 2010 May2011 QX56

EM-88
< REMOVAL AND INSTALLATION >
CYLINDER HEAD
2. Install new cylinder head gaskets.
3. Install cylinder head as per the following: CAUTION:
 If cylinder head bolts are re-used, check their ou ter diameters before installation. Refer to EM-92,
"Inspection".
 Before installing cylinder head, inspect cylinder head distortion. Refer to EM-92, "
Inspection".
 Tighten cylinder head bolts in numerical order as shown in fig- ure.
 Use TORX socket.
a. Apply new engine oil to threads and seat surfaces of cylinder head bolts.
b. Tighten all cylinder head bolts.
c. Tighten all cylinder head bolts (clockwise).
d. Completely loosen all cylinder head bolts.
CAUTION:
In step “d”, loosen bolts in the reverse order of that indi-
cated in the figure.
e. Tighten all cylinder head bolts.
f. Tighten all cylinder head bolts (clockwise).
g. Tighten all cylinder head bolts again (clockwise).
CAUTION:
Check the tightening angle us ing the angle wrench [SST:
KV10112100 (BT8653-A)] (A). Never make judgment by
visual inspection.
 Check tightening angle indicated on the angle wrench indica- tor plate.
4. Install valve lifter.  Install it in the original position.
5. Install in the reverse order of removal.
A: Bank 2
B: Bank 1
: Engine front
: 40.0 N·m (4.1 kg-m, 30 ft-lb)
Angle tightening: 75 degrees : 0 N·m (0 kg-m, 0 ft-lb)
: 40.0 N·m (4.1 kg-m, 30 ft-lb)
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Angle tightening: 90 degrees
Angle tightening: 90 degrees
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Revision: 2010 May2011 QX56

CYLINDER HEADEM-91
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d. Using the valve guide reamer (commercial service tool) (A),
apply reamer finish to valve guide (EXH).
2. Install valve seat (EXH), if removed. Replace with oversize [0.5 mm (0.020 in)] valve seat (EXH).
a. Ream cylinder head recess diameter (a) for service valve seat (EXH).
 Be sure to ream in circles concentric to valve guide center.
This enables valve to fit correctly.
b. Heat cylinder head to 110 to 130 °C (230 to 266 °F) by soaking in
heated oil (A).
c. Provide valve seats (EXH) cooled well with dry ice. Force fit valve seat (EXH) into cylinder head. WARNING:
Cylinder head contains heat. When working, w ear protective equipment to avoid getting burned.
CAUTION:
Avoid directly touching cold valve seats.
d. Using the valve seat cutter set (commercial service tool) or valve seat grinder, finish seat to the specified dimensions. Refer to
EM-135, "
CylinderHead".
CAUTION:
When using the valve seat cutt er, firmly grip cutter handle
with both hands. Then, press on the contacting surface all
around the circumference to cu t in a single drive. Improper
pressure on cutter or cutting many different times may
result in staged valve seat.
e. Using compound, grind to adjust valve fitting.
f. Check again for normal contact. Refer to EM-92, "
Inspection".
3. Install new valve oil seals as per the following: Standard : Refer to
EM-135, "
CylinderHead".
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Oversize (service) [0.5 mm (0.020 in)]:
: Refer to EM-135, "
CylinderHead".
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SEM934C
Revision: 2010 May2011 QX56