2011 INFINITI QX56 maintenance

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
JPBIA3429ZZ
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
JPBIA0102ZZ
Revision: 2010 May2011 QX56

ENGINE MAINTENANCEMA-15
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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
JPBIA3429ZZ
JPBIA0108ZZ
Revision: 2010 May2011 QX56

MA-16
< PERIODIC MAINTENANCE >
ENGINE MAINTENANCE
 Pull negative-pressure valve to open it, and check that it closecompletely when released.
- Check that there is no dirt or damage on the valve seat of reservoir
tank cap negative-pressure valve.
- Check that there are no unusualness in the opening and closing conditions of negative-pressure valve.
 Check reservoir tank cap relief pressure.
- When connecting reservoir tank cap to the radiator cap tester (commercial service tool) and the radiator cap tester adapter (com-
mercial service tool) (A), apply engine coolant to the cap seal sur-
face.
 Replace reservoir tank cap if there is an unusualness related to the above three.
CAUTION:
When installing reservoir tank cap, thoroughly wipe out the water inlet filler neck to remove any waxy
residue or foreign material.
RADIATOR
RADIATOR : InspectionINFOID:0000000006394849
Check radiator for mud or clogging. If nec essary, clean radiator as per the following:
 Be careful not to bend or damage radiator fins.
 When radiator is cleaned without removal, remove all surrounding parts such as radiator cooling fan shroud. Then tape harness and connectors to prevent water from entering.
1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surfaces once per minute.
3. Stop washing if any stains no longer flow out from radiator.
4. Blow air into the back side of radiator core vertically downward.  Use compressed air lower than 490 kPa (4.9 bar, 5 kg/cm
2, 71 psi) and keep distance more than 30 cm
(11.8 in).
5. Blow air again into all the radiator core su rfaces once per minute until no water sprays out.
FUEL LINES
SMA967B
Standard and limit : Refer to CO-23, "Radiator".
JPBIA0109ZZ
Revision: 2010 May2011 QX56

ENGINE MAINTENANCEMA-17
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FUEL LINES : InspectionINFOID:0000000006394850
 Inspect fuel lines, fuel filler cap and fuel tank for improper attach-
ment, leakage, cracks, damage, loose connections, chafing or
deterioration.
 If necessary, repair or replace damaged parts.
AIR CLEANER FILTER
AIR CLEANER FILTER : Removal and InstallationINFOID:0000000006394838
REMOVAL
NOTE:
 The viscous paper type filter does not need cleaning between replacement intervals.
 Replace the air filter as necessary for periodic maintenance. Refer to MA-6, "
Introduction of Periodic Mainte-
nance".
1. Unhook clips, and lift air cleaner case (upper).
2. Remove air cleaner filter from air cleaner case.
INSTALLATION
Install is the reverse order of removal.
ENGINE OIL
ENGINE OIL : DrainingINFOID:0000000006394841
WARNING:
 Be careful not to burn yourself, as th e engine and engine oil may be hot.
 Prolonged and repeated contact with used engine oil may cau se skin cancer; try to avoid direct skin
contact with used oil. If skin contact is made, w ash thoroughly with soap or hand cleaner as soon as
possible.
1. Warm up the engine, and check for any oil leaks.
2. Stop the engine and wait for at least 10 minutes.
3. Remove drain plug and oil filler cap to drain the old oil.
ENGINE OIL : RefillingINFOID:0000000006394842
1. Install drain plug with new washer. CAUTION:
Be sure to clean drain plug and install with new washer.
2. Refill with new engine oil. Engine oil specificat ion and viscosity:
Refer to MA-10, "
Fluids and Lubricants".
CAUTION:
 The refill capacity depends on the engine oi l temperature and drain time. Use these specifica-
tions for reference only.
 Always use oil level gauge to determine the proper amount of engine oil in engine.
A : Engine
B : Fuel line
C : Fuel tank
JPBIA0129ZZ
Tightening torque : Refer to EM-54, "Exploded View".
Engine oil capacity : Refer to LU-17, "
Periodical Maintenance Specification".
Revision: 2010 May2011 QX56

MA-18
< PERIODIC MAINTENANCE >
ENGINE MAINTENANCE
3. Warm up the engine and check area around drain plug and oil filter for engine oil leakage.
4. Stop the engine and wait for 10 minutes.
5. Check the engine oil level. Refer to LU-7, "
Inspection".
OIL FILTER
OIL FILTER : Removal and InstallationINFOID:0000000006394843
REMOVAL
1. Remove front under cover.
2. Drain engine oil. Refer to MA-17, "
ENGINE OIL : Draining".
3. Remove oil filter using oil filter wrench [SST: KV10115801 (J- 38956)].
WARNING:
Be careful not to burn yourself, as the engine and engine oil
may be hot.
CAUTION:
 The oil filter is equipped with a pressure relief valve.
 Use Genuine NISSAN oil filter or equivalent.
 When removing, prepare a sh op cloth to absorb any
engine oil leaks or spills.
 Do not allow engine oil to adhere to the drive belts.
 Completely wipe off any engi ne oil that adheres to the
engine and the vehicle.
INSTALLATION
1. Remove foreign materials adhering to the oil filter seal mating surface.
2. Apply clean engine oil to the oil f ilter seal circumference of the
new oil filter as shown.
3. Screw on the oil filter manually until it touches the installation
surface, then tighten it by 2/3 turn as shown. Or tighten to speci-
fication.
4. Refill engine with new engine oil. Refer to MA-17, "
ENGINE OIL : Refilling".
5. Inspect engine for oil leaks. Refer to LU-7, "
Inspection".
6. Install front under cover.
SPARK PLUG
WBIA0388E
SMA010
Oil filter : 17.7 N·m (1.8 kg-m, 13 ft-lb)
SMA229B
Revision: 2010 May2011 QX56

ENGINE MAINTENANCEMA-19
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SPARK PLUG : Removal and InstallationINFOID:0000000006394839
REMOVAL
1. Remove engine cover. Refer to
EM-25, "Exploded View".
2. Remove ignition coil. Refer to EM-29, "
Exploded View".
3. Remove spark plug with a spark plug wrench (commercial ser- vice tool).
INSTALLATION
Note the following item, installa is the reverse order of removal.
CAUTION:
Install ignition coil marked wi th an identification mark (A) on
cylinder No. 5, 6, 7 and 8.
SPARK PLUG : InspectionINFOID:0000000006394840
INSPECTION AFTER REMOVAL
Use the standard type spark plug for normal condition.
CAUTION:
 Never drop or impact spark plug.
 Never use a wire brush for cleaning.
 If plug tip is covered with carbon, use spark plug cleaner to
clean.
 Measure spark plug gap. When it exceeds the limit, replace spark plug even if it is within the speci-
fied replacement mileage. Refer to EM-132, "
Spark Plug".
a : 14 mm (0.55 in)
JPBIA0030ZZ
: Engine front
JPBIA3471ZZ
Spark plug (Standard type) : Refer to EM-132, "Spark Plug".
Cleaner air pressure : Less than 588 kPa (5.9 bar, 6 kg/cm
2, 85 psi)
Cleaning time
: Less than 20 seconds
SMA773C
Revision: 2010 May2011 QX56

MA-20
< PERIODIC MAINTENANCE >
ENGINE MAINTENANCE
 Spark plug gap adjustment is not required between replace-ment intervals.
EVAP VAPOR LINES
EVAP VAPOR LINES : InspectionINFOID:0000000006220923
1. Visually inspect EVAP vapor lines for improper attachment and for cracks, damage, loose connections,
chafing and deterioration.
2. Inspect fuel tank filler cap vacuum relief valve for clogging, sticking, etc.
Refer to EC-532, "
Inspection".
JPBIA0031ZZ
Revision: 2010 May2011 QX56

CHASSIS MAINTENANCEMA-21
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CHASSIS MAINTENANCE
EXHAUST SYSTEM
EXHAUST SYSTEM : InspectionINFOID:0000000006220926
Check exhaust pipes, muffler and mounting for improper attachment,
leakage, cracks, damage or deterioration.
 If damage is found, repair or replace damaged parts.
A/T FLUID
A/T FLUID : InspectionINFOID:0000000006376364
FLUID LEAKAGE
 Check transaxle surrounding area (oil seal and plug etc.) for fluid
leakage.
 If anything is found, repair or replace damaged parts and adjust A/ T fluid level. Refer to TM-95, "
Adjustment".
TRANSFER FLUID
TRANSFER FLUID : InspectionINFOID:0000000006394468
FLUID LEAKAGE
Check transfer surrounding area (oil seal, drain plug, and filler plug etc.) for fluid leakage.
FLUID LEVEL
1. Remove filler plug (1) and gasket. Then check that fluid is filled
up from mounting hole for the filler plug.
CAUTION:
Never start engine whil e checking fluid level.
2. Set a new gasket onto filler plug (1), and install it on transfer and then tighten to the specified torque.
CAUTION:
Never reuse gasket.
TRANSFER FLUID : DrainingINFOID:0000000006394469
1. Run the vehicle to warm up the transfer unit sufficiently.
2. Stop the engine.
SMA211A
JSDIA1912ZZ
Specified torque : 33 N·m (3.4 kg-m, 24 ft-lb)
JPDIE0295ZZ
Revision: 2010 May2011 QX56