2011 INFINITI QX56 coolant level

LU-12
< REMOVAL AND INSTALLATION >
OIL COOLER
CAUTION:
Perform this step when engine is cold.
4. Remove oil filter. Refer to LU-9, "
Removal and Installation".
5. Remove connector bolt, and remove oil cooler.
INSTALLATION
Installation is in the reverse order of removal, paying attention to the following:
 Confirm that no foreign objects are adhering to the sealing surfaces of the oil cooler and oil pan.
InspectionINFOID:0000000006289623
INSPECTION AFTER REMOVAL
Oil Cooler
Check oil cooler for cracks. Check oil cooler for clogging by blowing compressed air through engine coolant
inlet. If necessary, replace oil cooler assembly.
Relief Valve
Inspect relief valve for movement, cracks and breaks by pushing the ball. If replacement is necessary, remove
the valve by prying it out using a suitable tool. Install a new valve in place by tapping it in.
INSPECTION AFTER INSTALLATION
1. Check engine oil and engine coolant levels and add engine oil and engine coolant. Refer to LU-7, "Inspec-
tion" and CO-8, "Inspection".
2. Start the engine, and check for l eaks of engine oil or engine coolant.
3. Stop the engine and wait for 10 minutes.
4. Check the engine oil level and engine coolant level again. Refer to LU-7, "
Inspection" and CO-8, "Inspec-
tion"
Revision: 2010 May2011 QX56

MA-2
FRONT DIFFERENTIAL GEAR OIL: R180A :
Draining ..................................................................
24
FRONT DIFFERENTIAL GEAR OIL: R180A : Re-
filling .......................................................................
25
REAR DIFFERENTIAL GEAR OIL: R230 ............. ...25
REAR DIFFERENTIAL GEAR OIL: R230 : Inspec-
tion ..........................................................................
25
REAR DIFFERENTIAL GEAR OIL: R230 : Drain-
ing ...........................................................................
25
REAR DIFFERENTIAL GEAR OIL: R230 : Refill-
ing ...........................................................................
26
WHEELS (BONDING WEIGHT TYPE) .....................26
WHEELS (BONDING WEIGHT TYPE) : Adjust-
ment ..................................................................... ...
26
BRAKE FLUID LEVEL AND LEAKS ........................27
BRAKE FLUID LEVEL AND LEAKS : Inspection ...28
BRAKE LINES AND CABLES ............................... ...28
BRAKE LINES AND CABLES : Inspection .............28
BRAKE FLUID ....................................................... ...28
BRAKE FLUID : Bleeding Brake System ................28
DISC BRAKE ......................................................... ...30
DISC BRAKE : Inspection ......................................30
DISC BRAKE : Front Disc Brake ............................31
DISC BRAKE : Rear Disc Brake .............................31
STEERING GEAR AND LINKAGE ........................ ...31
STEERING GEAR AND LINKAGE : Inspection ......31
POWER STEERING FLUID AND LINES ............... ...32
POWER STEERING FLUID AND LINES : Inspec-
tion ..........................................................................
32
AXLE AND SUSPENSION PARTS ...........................32
AXLE AND SUSPENSION PARTS : Inspection .. ...32
DRIVE SHAFT ........................................................ ...33
DRIVE SHAFT : Inspection .....................................33
BODY MAINTENANCE .....................................34
LOCKS, HINGES AND HOOD LATCH .................. ...34
LOCKS, HINGES AND HOOD LATCH : Lubricat-
ing ...........................................................................
34
SEAT BELT, BUCKLES, RETRACTORS, AN-
CHORS AND ADJUSTERS ................................... ...
34
SEAT BELT, BUCKLES, RETRACTORS, AN-
CHORS AND ADJUSTERS : Inspection .................
34
SERVICE DATA AND SPECIFICATIONS
(SDS) .......... ................................................
35
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
35
DRIVE BELTS ........................................................ ...35
DRIVE BELTS : Drive Belts ....................................35
ENGINE COOLANT ............................................... ...35
ENGINE COOLANT :
Periodical Maintenance Specification ....................
35
ENGINE OIL ........................................................... ...35
ENGINE OIL : Periodical Maintenance Specifica-
tion ..........................................................................
35
SPARK PLUG ........................................................ ...35
SPARK PLUG : Spark Plug ....................................35
ROAD WHEEL ....................................................... ...35
ROAD WHEEL : Road Wheel .................................35
Revision: 2010 May2011 QX56

GENERAL MAINTENANCEMA-5
< PERIODIC MAINTENANCE >
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UNDER THE HOOD AND VEHICLE
The maintenance items listed here should
be checked periodically (e.g. each time you check the engine oil or refuel).
Seats Check seat position controls such as seat adjusters, seatback recliner, etc. to
make sure they operate smoothly and that all latches lock securely in every po-
sition. Check that the head restrains move up and down smoothly and that the
locks (if equipped) hold securely in all latched positions. Check that the latches
lock securely for folding-down rear seatbacks. —
Seat belts Check that all parts of the seat belt system (e.g. buckles, anchors, adjusters
and retractors) operate properly and smoothly, and are installed securely.
Check the belt webbing for cuts, fraying, wear or damage. MA-34
Accelerator pedal
Check the pedal for smooth operation and make sure the pedal does not catch
or require uneven effort. Keep the floor mats away from the pedal. —
Brakes Check that the brake does not pull the vehicle to one side when applied. —
Brake pedal and
booster Check the pedal for smooth operation and make sure it has the proper distance
under it when depressed fully. Check the brake booster function. Be sure to
keep the floor mats away from the pedal. BR-7
BR-15
Parking brake
Check that the lever or pedal has the proper travel and make sure that the ve-
hicle is held securely on a fairly steep hill when only the parking brake is ap-
plied. PB-3
Automatic transmis-
sion “Park” mecha-
nismCheck that the lock release button on the selector lever operates properly and
smoothly. On a fairly steep hill check that the vehicle is held securely with the
selector lever in the P (Park) position without applying any brakes.
—
Item
Reference page
Item Reference page
Windshield washer
fluid Check that there is adequate fluid in the tank. —
Engine coolant level Check the coolant level when the engine is cold. MA-12
Radiator and hosesCheck the front of the radiator and clean off any dirt, insects, leaves, etc., that
may have accumulated. Make sure the hoses have no cracks, deformation, de-
terioration or loose connections. MA-16
Brake fluid levels
Make sure that the brake fluid level is between the “MAX” and “MIN” lines on the
reservoir(s). MA-28
Battery
Check the fluid level in each cell. It should be between the “MAX” and “MIN”
lines. Vehicles operated in high temperatures or under severe conditions re-
quire frequent checks of the battery fluid level. PG-159
Engine drive belts
Make sure that no belt is frayed, worn, cracked or oily. MA-12
Engine oil levelCheck the level on the oil level gauge after parking the vehicle on a level spot
and turning off the engine. LU-7
Power steering fluid
level and linesCheck the level on the dipstick with the engine off. Check the lines for improper
attachment, leaks, cracks, etc.
MA-32
Exhaust system
Make sure there are no loose supports, cracks or holes. If the sound of the ex-
haust seems unusual or there is a smell of exhaust fumes, immediately locate
the trouble and correct it. MA-21
Underbody
The underbody is frequently exposed to corrosive substances such as those
used on icy roads or to control dust. It is very important to remove these sub-
stances, otherwise rust will form on the floor pan, frame, fuel lines and around
the exhaust system. At the end of winter, the underbody should be thoroughly
flushed with plain water, being careful to clean those areas where mud and dirt
can easily accumulate. —
Fluid leaks Check under the vehicle for fuel, oil, water or other fluid leaks after the vehicle
has been parked for a while. Water dripping from the air conditioner after use is
normal. If you should notice any leaks or gasoline fumes are evident, check for
the cause and correct it immediately. —
Revision: 2010 May2011 QX56

MA-12
< PERIODIC MAINTENANCE >
ENGINE MAINTENANCE
ENGINE MAINTENANCE
DRIVE BELTS
DRIVE BELTS : Exploded ViewINFOID:0000000006394835
DRIVE BELTS : CheckingINFOID:0000000006394836
WARNING:
Be sure to perform the these steps when engine is stopped.
 Check that the indicator (C) (notch on fixed side) of each auto-tensioner is within the possible use range (A).
NOTE:
 Check the each auto-tensioners indication when the engine is cold.
 When new drive belts is installed, the indicator (notch on fixed side) should be within the range (B) in the\
figure.
 Visually check all drive belts for wear, damage or cracks.
 If the indicator (notch on fixed side) is out of the possible use range or drive belts are damaged, replace drive
belts.
DRIVE BELTS : Tension AdjustmentINFOID:0000000006394837
Refer to EM-132, "Drive Belts".
ENGINE COOLANT
ENGINE COOLANT : InspectionINFOID:0000000006394844
LEVEL
1. Drive belt 2. Power steering oil pump pulley 3. Alternator pulley
4. Crankshaft pulley 5. A/C compressor 6. Idler pulley
7. Cooling fan pulley 8. Water pump pulley 9. Drive belt auto-tensioner
A. Possible use range B. Range when new drive belt is in-
stalledC. Indicator
D. View D
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Revision: 2010 May2011 QX56

ENGINE MAINTENANCEMA-13
< PERIODIC MAINTENANCE >
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 Check if the reservoir tank engine coolant level is within the “MIN”
to “MAX” when the engine is cool.
 Adjust the engine coolant level if necessary. WARNING:
Never remove reservoir tank cap when engine is hot.
LEAKAGE
 To check for leakage, apply pressure to the cooling system with theradiator cap tester and radiator cap tester adapter (commercial
service tool) (A).
WARNING:
Never remove radiator cap and reservoir tank cap when
engine is hot. Serious burns could occur from high-pressure
engine coolant escaping from water inlet.
CAUTION:
Higher test pressure than specified may cause radiator dam-
age.
NOTE:
In a case that engine coolant decreas es, fill radiator with engine coolant.
 If anything is found, repair or replace damaged parts.
ENGINE COOLANT : DrainingINFOID:0000000006394845
WARNING:
 Never remove radiator cap and reservoir tank cap when engine is hot. Serious burns could occur
from high-pressure engine co olant escaping from radiator.
 Wrap a thick cloth around the caps. Slowly turn them a quarter of a turn to release built-up pressure.
Carefully remove the caps by turning it all the way.
1. Open radiator drain plug (1) at the bottom of radiator, and then remove radiator cap and reservoir tank cap.
When draining all of engine cool ant in the system, open water drai n plug on cylinder block. Refer
to EM-103, "
Setting".
2. Remove reservoir tank if necessary, and drain engine coolant and clean reservoir tank before installing.
3. Check drained engine coolant for contaminants such as rust, corrosion or discoloration. If contaminated, flush the engine cooling system. Refer to MA-15, "
ENGINE COOLANT : Flushing".
ENGINE COOLANT : RefillingINFOID:0000000006394846
1. Install reservoir tank if removed, and radiator drain plug.
CAUTION:
Be sure to clean drain plug and install with new O-ring. Refer to CO-13, "
Exploded View".
A: MAX
B: MIN
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Testing pressure : Refer to CO-23, "Radiator".
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2 : Front under cover
: Vehicle front
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Revision: 2010 May2011 QX56

MA-14
< PERIODIC MAINTENANCE >
ENGINE MAINTENANCE
If water drain plug on cylinder block is removed, close and tighten it. Refer to EM-107, "Disassem-
bly and Assembly".
2. Check that each hose clamp is firmly tightened.
3. Remove air relief plug (1) on heater hose.
4. Fill radiator, and reservoir tank, to specified level. Pour engine coolant through engine coolant filler neck
slowly of less than 3 (2-5/8 lmp qt) a minute to allow air
in system to escape.
 Use Genuine NISSAN Long Life Antifreeze/Coolant or
equivalent mixed with water (d istilled or demineralized).
Refer to MA-10, "
Fluids and Lubricants".
5. When engine coolant overflows air relief hole on heater hose, install air relief plug with clamp. Then refill
radiator with engine coolant.
6. Install radiator cap.
7. Install reservoir tank cap.
8. Warm up engine until opening thermostat less than 3,000 rpm.  Check thermostat opening condition by touching radiator hose (lower) to see a flow of warm water.
CAUTION:
Watch water temperature gauge so as not to overheat engine.
9. Stop the engine and cool down to less than approximately 50 °C (122 °F).
 Cool down using fan to reduce the time.
 If necessary, refill radiator up to filler neck with engine coolant.
10. Refill reservoir tank to “MAX” level line with engine coolant if necessary.
11. Repeat steps 6 through 10 two or more times with reservoir tank cap installed until engine coolant level no longer drops. : 1.96 N·m (0.2 kg-m, 17 in-lb)
2. Engine cover
: Vehicle front
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Engine coolant capacity : Refer to CO-23,
"PeriodicalMaintenanceS
pecification".
(With reservoir tank at
“MAX” level)JPBIA0412ZZ
Reservoir tank engine
coolant capacity :Refer to
CO-23,
"PeriodicalMaintenanceSp
ecification".
(At “MAX” level)
A : MAX
B: MIN
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Revision: 2010 May2011 QX56

ENGINE MAINTENANCEMA-15
< PERIODIC MAINTENANCE >
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12. Check cooling system for leakage with engine running.
13. Warm up the engine, and check for sound of engine coolant flow while running engine from idle up to
3,000 rpm with heater temperature controller se t at several position between “COOL” and “WARM”.
 Sound may be noticeable at heater unit.
14. Repeat step 13 three times.
15. If sound is heard, bleed air from cooling system by repeating step 4, and steps from 6 to 14 until engine
coolant level no longer drops.
ENGINE COOLANT : FlushingINFOID:0000000006394847
1. Install reservoir tank if removed, and radiator drain plug. CAUTION:
Be sure to clean drain plug and install with new O-ring. Refer to CO-13, "
Exploded View".
If water drain plug on cylinder block is removed, close and tighten it. Refer to EM-107, "
Disassem-
bly and Assembly".
2. Remove air relief plug (1) on heater hose.
3. Fill radiator and reservoir tank with water until water spills from the air relief holes, then close air relief
plugs with clamp. Fill radiator and rese rvoir tank with water and reinstall caps.
4. Run the engine and warm it up to normal operating temperature.
5. Rev the engine two or three times under no-load.
6. Stop the engine and wait until it cools down.
7. Drain water from the system. Refer to MA-13, "
ENGINE COOLANT : Draining".
8. Repeat steps 1 through 7 until clear water begins to drain from radiator.
RESERVOIR TANK CAP
RESERVOIR TANK CAP : InspectionINFOID:0000000006394848
 Check valve seat of reservoir tank cap.
- Check if valve seat (A) is swollen to the extent that the edge of the metal plunger (B) cannot be seen when watching it vertically from
the top.
- Check if valve seat has no soil and damage. : 1.96 N·m (0.2 kg-m, 17 in-lb)
2. Engine cover
: Vehicle front
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Revision: 2010 May2011 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
MA-35
< SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
DRIVE BELTS
DRIVE BELTS : Drive BeltsINFOID:0000000006394853
DRIVE BELT
ENGINE COOLANT
ENGINE COOLANT : Periodical Maintenance SpecificationINFOID:0000000006394856
ENGINE COOLANT CAPACITY (APPROXIMATELY)
Unit: (US qt, Imp qt)
ENGINE OIL
ENGINE OIL : Periodical Maintenance SpecificationINFOID:0000000006394855
ENGINE OIL CAPACITY (APPROXIMATE)
Unit: (US qt, Imp qt)
SPARK PLUG
SPARK PLUG : Spark PlugINFOID:0000000006394854
SPARK PLUG
Unit: mm (in)
ROAD WHEEL
ROAD WHEEL : Road WheelINFOID:0000000006349771
ALUMINUM WHEEL
Tension of drive belts Belt tension is not necessary, as it is automatically adjusted by drive belt auto-tensioner.
Engine coolant capacity [With reservoir tank (“MAX” level)] 14.9 (15-6/8, 13-1/8)
Reservoir tank engine coolant capacity (At “MAX” level) 1.0 (1, 7/8)
Drain and refill
With oil filter change 6.5 (6-7/8, 5-3/4)
Without oil filter change 6.2 (6-4/8, 5-1/2)
Dry engine (engine overhaul) 7.6 (8, 6-3/4)
Make NGK
Standard type DILKAR7B11
Gap Standard 1.1 (0.043)
Limit 1.25 (0.049)
Item Limit
Radial runout Lateral deflection
Less than 0.3 mm (0.012 in)
Vertical deflection
Allowable unbalance Dynamic (At flange) Less than 7 g (0.25 oz) (one side)
Static (At flange) Less than 14 g (0.49 oz)
Revision: 2010 May2011 QX56