INFINITI QX56 2011 Factory Service Manual

LU-8
< PERIODIC MAINTENANCE >
ENGINE OIL
5. Install the oil pressure gauge [SST: ST25051001 (J25695-1)] (A)and hose [SST: ST25052000 (J25695-2)] (B).
6. Start the engine and warm it up to normal operating temperature.
7. Check the engine oil pressure with engine running under no-load. Refer to LU-17, "
EngineOilPressure".
CAUTION:
If the difference is extreme, check the oil passages and oil pump for leaks and blockages.
8. After the inspections, install oil pressure switch as follows:
a. Remove old liquid gasket adhering to oil pressure switch and engine.
b. Apply liquid gasket and tighten oil pressure switch to the specification. Use Genuine RTV Silicone Seal ant or equivalent. Refer to GI-22, "
Recommended Chemical Prod-
ucts and Sealants".
c. After warming up engine, make sure there is no leakage of engine oil with engine running.
DrainingINFOID:0000000006289617
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 cause skin cancer; try to avoid direct skin
contact with used oil. If skin contact is made, wash 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.
RefillingINFOID:0000000006289618
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 specification 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.
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".
JPBIA0074ZZ
Oil pressure switch torque : Refer to EM-57, "Exploded View".
Tightening torque : Refer to EM-54, "
Exploded View".
Engine oil capacity : Refer to LU-17, "
Periodical Maintenance Specification".
Revision: 2010 May2011 QX56

OIL FILTERLU-9
< PERIODIC MAINTENANCE >
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OIL FILTER
Removal and InstallationINFOID:0000000006289619
REMOVAL
1. Remove front under cover.
2. Drain engine oil. Refer to
LU-8, "
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 s hop cloth to absorb any
engine oil leaks or spills.
 Do not allow engine oil to adhere to the drive belts.
 Completely wipe off any engine 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 filter 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 LU-8, "
Refilling".
5. Inspect engine for oil leaks. Refer to LU-7, "
Inspection".
6. Install front under cover.
InspectionINFOID:0000000006289620
INSPECTION AFTER INSTALLATION
1. Check engine oil level. Refer to LU-7, "Inspection".
2. Start engine and check for engine oil leaks.
3. Stop engine and wait for 10 minutes.
WBIA0388E
SMA010
Oil filter : 17.7 N·m (1.8 kg-m, 13 ft-lb)
SMA229B
Revision: 2010 May2011 QX56

LU-10
< PERIODIC MAINTENANCE >
OIL FILTER
4. Check engine oil level and add engine oil as required.
Revision: 2010 May2011 QX56

OIL COOLERLU-11
< REMOVAL AND INSTALLATION >
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REMOVAL AND INSTALLATION
OIL COOLER
Exploded ViewINFOID:0000000006289621
Removal and InstallationINFOID:0000000006289622
WARNING:
Be careful not to burn yourself, as the en
gine oil and engine coolant may be hot.
CAUTION:
 Do not spill engine coolant on the drive belt.
 Do not spill engine oil on rubber parts such as drive belts and engine mounting insulator.
REMOVAL
NOTE:
When removing oil cooler only, step 1 is unnecessary.
1. Drain engine coolant from radiator and cylinder block. Refer to CO-8, "
Draining" and EM-107, "Disassem-
bly and Assembly".
NOTE:
Perform this step only when removing water pipes and hoses.
2. Remove front under cover.
3. Disconnect water hoses from oil cooler, pinching hos es near oil cooler to prevent engine coolant from
spilling.
1. Oil pan (upper) 2. Gasket 3. Connector pipe
4. Clamp 5. Water hose 6. A/T fluid warmer
7. Water hose 8. Oil filter 9. Oil cooler
10. O-ring 11. Water hose 12. Water pipe
13. Water hose
A. To cylinder block B. Refer to LU-9
C. To thermostat housing
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA3328GB
Revision: 2010 May2011 QX56

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

OIL PUMPLU-13
< REMOVAL AND INSTALLATION >
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OIL PUMP
Exploded ViewINFOID:0000000006289624
Removal and InstallationINFOID:0000000006289625
REMOVAL
NOTE:
Do not remove the engine assembly to perform this procedure.
1. Disconnect battery cable from
negative terminal. Refer to PG-165, "
Exploded View".
2. Drain engine oil. Refer to LU-8, "
Draining".
3. Drain engine coolant from radiator. Refer to CO-8, "
Draining".
CAUTION:
 Perform this step when engine is cold.
 Never spill engine coolant on drive belts.
4. Remove the following components and related parts:  Air cleaner case assembly and air duct. Refer to EM-27, "
Exploded View".
 Drive belt auto tensioner and idler pulley. Refer to EM-26, "
Exploded View".
 Fan shroud. Refer to CO-13, "
Exploded View".
 Cooling fan, fan coupling and fan bracket. Refer to CO-16, "
Exploded View".
 Front under cover. Refer to EXT-25, "
Exploded View".
 Protector A and B. Refer to SCS-32, "
FRONT TUBE ASSEMBLY : Exploded View".
 Front suspension rear cross member. Refer to TM-205, "
2WD : Exploded View" (2WD models) or TM-
208, "4WD : Exploded View" (4WD models).
 Steering gear assembly. Refer to ST-41, "
Exploded View".
 Front final drive assembly. Refer to DLN-162, "
Exploded View".
 Power steering oil pump. Refer to ST-48, "
Exploded View".
 Alternator, alternator bracket and alternator stay. Refer to CHG-25, "
Exploded View".
 Oil pan (lower) and oil strainer. Refer to EM-54, "
Exploded View".
 Oil pan (upper). Refer to EM-57, "
Exploded View".
 Electric throttle control actuator. Refer to EM-30, "
Exploded View".
 Radiator hoses. Refer to CO-13, "
Exploded View".
 Water suction hose and water suction pipe. Refer to CO-20, "
Exploded View".
 Water pump pulley. Refer to CO-18, "
Exploded View".
 Rocker cover. Refer to EM-33, "
Exploded View".
WBIA0415E
1. Oil pump body 2. Outer rotor 3. Inner rotor
4. Oil pump cover 5. Oil pump drive spacer 6. Regulator valve
7. Regulator spring 8. Regulator plug
Revision: 2010 May2011 QX56

LU-14
< REMOVAL AND INSTALLATION >
OIL PUMP
5. Remove the oil pump drive spacer. Hold and remove the flat space of the oil pump drive spacer bypulling it forward.
6. Remove the oil pump. Refer to LU-13, "
Exploded View".
INSTALLATION
1. Install the oil pump.
2. Install the oil pump drive spacer as follows:
 When inserting the oil pump drive spacer, align the crankshaft
key and the flat face of the inner rotor.
 If they are not aligned, rotate the oil pump inner rotor by hand.
 Make sure that each part is aligned and tap lightly until it reaches the end.
3. Installation of the remaining components is in the reverse order of removal.
Disassembly and AssemblyINFOID:0000000006289626
DISASSEMBLY
1. Remove oil pump cover.
2. Remove inner rotor and outer rotor from oil pump body.
3. Remove the regulator valve plug, regulator valve spring and regulator valve.
ASSEMBLY
Installation is in the reverse order of removal.
NOTE:
Install the oil pump inner rotor and outer rotor with the punched
marks on the oil pump cover side.
InspectionINFOID:0000000006289627
INSPECTION AFTER DISASSEMBLY
Clearance of Oil Pump Parts
KBIA2512E
KBIA2490E
PBIC0144E
Revision: 2010 May2011 QX56

OIL PUMPLU-15
< REMOVAL AND INSTALLATION >
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 Measure radial clearance using a suitable tool.
 Measure side clearance using suitable tools.
 Calculate the clearance between inner rotor and oil pump body as
follows.
1. Measure the outer diameter of protruded portion of inner rotor
(position 5) using suitable tool.
2. Measure the inner diameter of oil pump body to brazed portion (position 6) using suitable tool.
3. Calculate the clearance using the following formula.  (Clearance) = (Inner diameter of oil pump body) - (Outer diameter of inner rotor)
Regulator Valve Clearance
Check regulator valve to oil pump cover clearance using the following formula.Body to outer rotor
(position 1)
: Refer to
LU-17, "
OilPump".
Inner rotor to outer
rotor tip (position 2) : Refer to
LU-17, "
OilPump".
PBIC0139E
Body to inner rotor
(position 3) : Refer to
LU-17, "OilPump".
Body to outer rotor
(position 4) : Refer to
LU-17, "
OilPump".
PBIC0140E
PBIC0141E
PBIC0142E
Inner rotor to brazed portion of housing clearance : Refer to LU-17, "OilPump".
Revision: 2010 May2011 QX56

LU-16
< REMOVAL AND INSTALLATION >
OIL PUMP
 (Clearance) = D1 (Valve hole diameter) - D2 (Outer Diameter of
valve)
CAUTION:
 Coat regulator valve with engine oil.
 Check that it falls smoothly into the regulator valve hole by its
own weight.
INSPECTION AFTER INSTALLATION
1. Check the engine oil level. Refer to LU-7, "Inspection"
2. Start the engine and check for engine oil leaks.
3. Stop the engine and wait 10 minutes.
4. Check the engine oil level and adjust the engine oil level as required. Refer to LU-7, "
Inspection".
Regulator valve
to oil pump cover
: Refer to
LU-17, "
RegulatorVa l v e".
PBIC0143E
Revision: 2010 May2011 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
LU-17
< SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Periodical Maintenance SpecificationINFOID:0000000006289628
ENGINE OIL CAPACITY (APPROXIMATE)
Unit: (US qt, Imp qt)
Engine Oil PressureINFOID:0000000006289629
Unit: kPa (kg/cm2, psi)
*: Engine oil temperature at 80
°C (176 °F)
Oil PumpINFOID:0000000006289630
Unit: mm (in)
Regulator ValveINFOID:0000000006289631
Unit: mm (in)
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)
Engine speed Approximate discharge pressure* Idle speed More than 98 (1.0, 14)2,000 rpm More than 294 (3.0, 43)
Oil pump body to oil pump outer rotor radial clearance 0.114 - 0.200 (0.0045 - 0.0079)
Oil pump inner rotor to oil pump outer rotor tip clearance Below 0.180 (0.0071)
Oil pump body to oil pump inner rotor axial clearance 0.030 - 0.070 (0.0012 - 0.0028)
Oil pump body to oil pump outer rotor axial clearance 0.030 - 0.090 (0.0012 - 0.0035)
Oil pump inner rotor to brazed portion of housing clearance 0.045 - 0.091 (0.0018 - 0.0036)
Regulator valve to oil pump cover clearance 0.040 - 0.097 (0.0016 - 0.0038)
Revision: 2010 May2011 QX56