2004 INFINITI QX56 engine

LU-10Revision: August 2007
OIL FILTER
2004 QX56
OIL FILTERPFP:15208
Removal and InstallationEBS00I4L
REMOVAL
1. Remove the engine front undercover using power tool.
2. Remove the oil filter using Tool.
CAUTION:

The oil filter is provided with a relief valve.
Use Genuine NISSAN oil filter or equivalent.

Be careful not to get burned when the engine and engine
oil are hot.

When removing, prepare a shop cloth to absorb any
engine oil leakage or spillage.

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 installation surface.
2. Apply engine oil to the oil seal circumference of the new oil filter.
3. Screw the oil filter manually until it touches the installation sur-
face, then tighten it by 2/3 turn. Or tighten to specification.
4. Inspect the engine for oil leakage. Refer to LU-10, "
INSPEC-
TION AFTER INSTALLATION" .
5. Install the engine front undercover using power tool.
INSPECTION AFTER INSTALLATION
1. Check the engine oil level. Refer to LU-7, "OIL LEVEL" .
2. After warming up the engine, check for engine oil leakage.
3. Stop engine and wait for 10 minutes.
4. Check engine oil level and add engine oil. Refer to LU-7, "
OIL LEVEL" . Tool number : KV10115801 (J-38956)
WBIA0388E
SM A01 0
Oil filter : 17.7 N·m (1.8 kg-m, 13 ft-lb)
SM A22 9B

OIL COOLER
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Revision: August 20072004 QX56
OIL COOLERPFP:21305
Removal and InstallationEBS00I4M
WA RN ING:
Be careful not to burn yourself, as the engine oil and engine coolant are hot.
REMOVAL
1. Remove engine front undercover using power tool.
2. Disconnect water hose, pinching hoses near oil cooler to prevent engine coolant from spilling.
CAUTION:
Do not spill engine coolant on the drive belt.
3. Remove oil filter. Refer to LU-10, "
Removal and Installation" .
CAUTION:
Do not spill engine oil on the drive belts.
4. Remove connector bolt, and remove oil cooler.
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
valve by prying it out using suitable tool. Install a new valve in place by tapping it.
WBIA0414E
1. Oil pan 2. Water hose 3. Water pipe
4. Water hose 5. Oil cooler bolt 6. Oil filter
7. Oil cooler 8. O-ring 9. Relief valve
10. Water hose 11. Connector pipe 12. Gasket

LU-12Revision: August 2007
OIL COOLER
2004 QX56
INSTALLATION
Installation is in the reverse order of removal, paying attention to the following:

Confirm that no foreign objects are adhering to the sealing sur-
faces of the oil cooler or oil pan.

Tighten the connecting bolt after aligning the stopper on the oil
pan side with protrusion of the oil cooler.
INSPECTION AFTER INSTALLATION
1. Check level of engine oil and engine coolant, and add engine oil and engine coolant. Refer to LU-7, "OIL
LEVEL" and CO-8, "LEVEL CHECK" .
2. Start the engine, and check there is no leak of engine oil or engine coolant.
3. Stop engine and wait for 10 minutes.
4. Check engine oil level and engine coolant level again.
KBIA2500E

LU-14Revision: August 2007
OIL PUMP
2004 QX56
INSPECTION AFTER INSTALLATION

Start the engine, and check for leaks of engine oil.

Stop engine and wait 10 minutes.

Check level and add engine oil as required. Refer to LU-7, "ENGINE OIL" .
Disassembly and AssemblyEBS00I4O
DISASSEMBLY
1. Remove oil pump cover.
2. Remove inner rotor and outer rotor from oil pump body.
3. Remove regulator plug, regulator spring and regulator valve.
INSPECTION AFTER DISASSEMBLY
Clearance of Oil Pump Parts

Measure radial clearance using 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.Clearance between outer rotor and oil
pump body (position 1)
: 0.114 - 0.200 mm (0.0045 - 0.0079 in)
Tip clearance between inner rotor
and outer rotor (position 2)
: Below 0.180 mm (0.0071 in)
PBIC0139E
Side clearance between inner rotor and
oil pump body (position 3)
: 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Side clearance between outer rotor and
oil pump body (position 4)
: 0.030 - 0.090 mm (0.0012 - 0.0035 in)
PBIC0140E
PBIC0141E

OIL PUMP
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Revision: August 20072004 QX56
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 as follows:

(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.
ASSEMBLY
Installation is in the reverse order of removal.
NOTE:
Install the inner rotor and outer rotor with the punched marks on the
oil pump cover side.
PBIC0142E
Inner rotor to brazed portion of housing
clearance
: 0.045 - 0.091 mm (0.0018 - 0.0036 in)
Regulator valve to oil pump cover
: 0.040 - 0.097 mm (0.0016 - 0.0038 in)
PBIC0143E
PBIC0144E

LU-16Revision: August 2007
SERVICE DATA AND SPECIFICATIONS (SDS)
2004 QX56
SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitEBS00I4P
OIL PRESSURE
Unit: kPa (kg/cm2 , psi)
OIL PUMP
Unit: mm (in)
REGULATOR VALVE
Unit: mm (in)
ENGINE OIL CAPACITY (APPROXIMATE)
Unit: (US qt, Imp qt) Engine speed Approximate discharge oil pressure
Idle speed More than 98 (1.0, 14)
2,000 rpm More than 294 (3.0, 43)
Body to outer rotor radial clearance 0.114 - 0.200 (0.0045 - 0.0079)
Inner rotor to outer rotor tip clearance Below 0.180 (0.0071)
Body to inner rotor side clearance 0.030 - 0.070 (0.0012 - 0.0028)
Body to outer rotor side clearance 0.030 - 0.090 (0.0012 - 0.0035)
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)
Drain and refillWith oil filter change 6.2 (6 1/2, 5 1/2)
Without oil filter change 5.9 (6 1/4, 5 1/4)
Dry engine (engine overhaul) 7.6 (8, 6 3/4)

MA-1
MAINTENANCE
L MAINTENANCE
CONTENTS
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SECTION MA
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Revision: August 20072004 QX56 PRECAUTIONS .......................................................... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 2
PREPARATION ........................................................... 3
Special Service Tools ............................................... 3
GENERAL MAINTENANCE ....................................... 4
General Maintenance ............................................... 4
PERIODIC MAINTENANCE ....................................... 6
Introduction of Periodic Maintenance ....................... 6
Maintenance For Off-road Driving (4WD only) ......... 6
Schedule 1 ............................................................... 6
EMISSION CONTROL SYSTEM MAINTE-
NANCE .................................................................. 6
CHASSIS AND BODY MAINTENANCE ............... 7
Schedule 2 ............................................................... 8
EMISSION CONTROL SYSTEM MAINTE-
NANCE .................................................................. 8
CHASSIS AND BODY MAINTENANCE ............... 9
RECOMMENDED FLUIDS AND LUBRICANTS ...... 10
Fluids and Lubricants ............................................. 10
SAE Viscosity Number ............................................11
GASOLINE ENGINE OIL .....................................11
ANTI-FREEZE COOLANT MIXTURE RATIO ......11
ENGINE MAINTENANCE ......................................... 12
Checking Drive Belts .............................................. 12
DRIVE BELT TENSION ...................................... 12
Changing Engine Coolant ...................................... 12
DRAINING ENGINE COOLANT ......................... 12
REFILLING ENGINE COOLANT ........................ 13
FLUSHING COOLING SYSTEM ......................... 14
Checking Fuel Lines ............................................... 15
Changing Fuel Filter ............................................... 15
Changing Engine Air Cleaner Filter ........................ 15
VISCOUS PAPER TYPE ..................................... 15
Changing Engine Oil .............................................. 16
Changing Oil Filter ................................................. 16
Changing Spark Plugs ........................................... 17
REMOVAL ........................................................... 17INSPECTION AFTER REMOVAL ....................... 18
INSTALLATION ................................................... 19
Checking EVAP Vapor Lines .................................. 19
CHASSIS AND BODY MAINTENANCE ................... 20
Changing In-cabin Microfilter .................................. 20
Checking Exhaust System ...................................... 21
Checking A/T Fluid ................................................. 21
Changing A/T Fluid ................................................. 23
Checking Transfer Fluid ......................................... 24
FLUID LEAKAGE AND FLUID LEVEL ................ 24
Changing Transfer Fluid ......................................... 24
DRAINING ........................................................... 24
FILLING ............................................................... 24
Checking Propeller Shaft ........................................ 24
Checking Final Drive Oil ......................................... 24
Changing Final Drive Oil ......................................... 25
Balancing Wheels ................................................... 25
REMOVAL ........................................................... 25
WHEEL BALANCE ADJUSTMENT ..................... 25
Tire Rotation ........................................................... 27
Checking Brake Fluid Level and Leaks .................. 27
Checking Brake Lines and Cables ......................... 27
Checking Disc Brake .............................................. 28
ROTOR ................................................................ 28
CALIPER ............................................................. 28
PAD ..................................................................... 28
Checking Steering Gear and Linkage ..................... 28
STEERING GEAR ............................................... 28
STEERING LINKAGE ......................................... 28
Checking Power Steering Fluid and Lines .............. 29
CHECKING FLUID LEVEL .................................. 29
CHECKING LINES .............................................. 29
Checking Axle and Suspension Parts .................... 29
FRONT AND REAR AXLE AND SUSPENSION
PARTS ................................................................. 29
DRIVE SHAFT ..................................................... 29
Lubricating Locks, Hinges and Hood Latches ........ 30
Checking Seat Belts, Buckles, Retractors, Anchors
and Adjusters .......................................................... 31

PREPARATION
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PREPARATIONPFP:00002
Special Service ToolsELS000ZX
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
KV10115801
(J-38956)
Oil filter cap wrenchRemoving and installing oil filter
a: 64.3 mm (2.531 in)
KV991J0010
(J-23688)
Engine coolant refractometerChecking concentration of ethylene glycol in
engine coolant
KV991J0070
(J-45695)
Coolant refill toolFilling cooling system
NT375
W BIA0539E
LMA053