check oil INFINITI QX56 2004 Factory Service Manual

OIL COOLER
LU-11
C
D
E
F
G
H
I
J
K
L
MA
LU
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
LU-15
C
D
E
F
G
H
I
J
K
L
MA
LU
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

MA-1
MAINTENANCE
L MAINTENANCE
CONTENTS
C
D
E
F
G
H
I
J
K
M
SECTION MA
A
B
MA
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
MA-3
C
D
E
F
G
H
I
J
K
MA
B
MA
Revision: August 20072004 QX56
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

GENERAL MAINTENANCE
MA-5
C
D
E
F
G
H
I
J
K
MA
B
MA
Revision: August 20072004 QX56
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).BrakesCheck that the brake does not pull the vehicle to one side when applied. —
Brake pedal and
boosterCheck the pedal for smooth operation and make sure it has the proper distance
under it when depressed fully. Check the brake booster function. Keep the floor
mats away from the pedal.BR-6, "
Inspection and
Adjustment", BR-17,
"On-Vehicle Service"
Parking brakeCheck that the parking brake control has the proper travel and make sure that
the vehicle is held securely on a fairly steep hill when only the parking brake is
applied.PB-3, "On-Vehicle Ser-
vice"
Automatic transmis-
sion “Park” mecha-
nismOn a fairly steep hill check that the vehicle is held securely with the selector
lever in the P position without applying the brakes. — ItemReference page
ItemReference page
Windshield washer
fluidCheck that there is adequate fluid in the tank.
—
Engine coolant levelCheck 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,
deterioration or loose connections.—
Brake fluid levelMake sure that the brake fluid level is between the “MAX” and “MIN” lines on the
reservoirsMA-27
BatteryCheck the fluid level in each cell. It should be between the “MAX” and “MIN”
lines. Vehicles operated in high temperatures or under severe conditions require
frequent checks of the battery fluid level.—
Engine drive beltMake sure that no belt is frayed, worn, cracked or oily.MA-12
Engine oil levelCheck the level on the dipstick after parking the vehicle on a level spot and turn-
ing off the engine.MA-16
Power steering fluid
level and linesCheck the level on the reservoir with the engine off. Check the lines for improper
attachment, leaks, cracks, etc.MA-29
Automatic transmis-
sion fluid levelCheck the level on the dipstick after putting the selector lever in “P” with the
engine idling.MA-21
Exhaust systemMake sure there are no loose supports, cracks or holes. If the sound of the
exhaust seems unusual or there is a smell of exhaust fumes, immediately locate
the trouble and correct it.MA-21
UnderbodyThe 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 leaksCheck 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.—

ENGINE MAINTENANCE
MA-13
C
D
E
F
G
H
I
J
K
MA
B
MA
Revision: August 20072004 QX56
3. Open the radiator drain plug at the bottom of the radiator, and
remove the radiator filler cap. This is the only step required
when partially draining the cooling system (radiator only).
CAUTION:
Do not to allow the coolant to contact the drive belts.
4. When draining all of the coolant in the system for engine
removal or repair, it is necessary to drain the cylinder block.
Remove the RH cylinder block drain plug to drain the right bank
and the oil cooler hose to drain the left bank as shown.
5. Remove the reservoir tank to drain the engine coolant, then clean the reservoir tank before installing it.
6. Check the drained coolant for contaminants such as rust, corrosion or discoloration.
If the coolant is contaminated, flush the engine cooling system. Refer to MA-14, "
FLUSHING COOLING
SYSTEM" .
REFILLING ENGINE COOLANT
1. Close the radiator drain plug. Install the reservoir tank, cylinder block drain plug, and the oil cooler hose, if
removed for a total system drain or for engine removal or repair.

The radiator must be completely empty of coolant and water.

Apply sealant to the threads of the cylinder block drain plug. Use Genuine High Performance Thread
Sealant or equivalent. Refer to GI-45, "
RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS" .
2. Set the vehicle heater controls to the full HOT and heater ON position. Turn the vehicle ignition ON with
the engine OFF as necessary to activate the heater mode.
3. Remove the vented reservoir cap and replace it with a non-vented reservoir cap before filling the cooling
system.
WBIA0391E
PBIC0146E
WBIA0392E
Radiator drain plug : Refer to CO-10, "RADIATOR" .
RH cylinder block drain plug : Refer to EM-73, "
CYLINDER BLOCK" .

MA-16
ENGINE MAINTENANCE
Revision: August 20072004 QX56
5. Install the air cleaner case (upper).
6. Install the air duct and resonator assembly (inlet).
Changing Engine OilELS0010A
WAR NIN G:

Be careful not to burn yourself, as the engine oil is 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 the oil drain plug and oil filler cap to drain the old oil.
4. Install a new washer on the oil drain plug, then install the oil drain plug in the oil pan.
CAUTION:
Clean the drain plug and install with a new washer.
5. Refill the engine with the specified oil.
CAUTION:

Clean the drain plug and install with a new washer.

The refill capacity depends on the oil temperature and drain time. Use the oil capacity value as a
reference and check the oil level using the dipstick when filling the oil.
6. Warm up the engine and check the area around the drain plug and oil filter for any oil leaks.
7. Stop the engine and wait for more than 10 minutes.
8. Check the oil level using the dipstick as shown. Add oil as nec-
essary and install the oil filler cap.
CAUTION:
Do not overfill the engine with oil.
Changing Oil FilterELS0010B
1. Remove the oil filter using Tool.
WAR NIN G:
Be careful not to burn yourself, as the engine and engine oil are hot.
NOTE:
The filter is a full-flow cartridge type and is provided with a relief valve.Oil pan drain plug : Refer to EM-22, "
OIL PAN AND OIL STRAINER" .
Oil capacity and grade : Refer to MA-10, "
RECOMMENDED FLUIDS AND LUBRI-
CANTS" .
SM A95 4C
Tool number : KV10115801 (J-38956)

MA-24
CHASSIS AND BODY MAINTENANCE
Revision: August 20072004 QX56
Checking Transfer FluidELS0010I
FLUID LEAKAGE AND FLUID LEVEL
1. Make sure that fluid is not leaking from the transfer assembly or around it.
2. Check fluid level from the filler plug hole as shown.
CAUTION:
Do not start engine while checking fluid level.
3. Install the filler plug with a new gasket to the transfer. Tighten to
the specified torque. Refer to TF-110, "
OVERHAUL" .
CAUTION:
Do not reuse gasket.
Changing Transfer FluidELS0010J
DRAINING
1. Stop engine.
2. Remove the drain plug and gasket and drain the fluid.
3. Install the drain plug with a new gasket to the transfer. Tighten to
the specified torque. Refer to TF-110, "
OVERHAUL" .
CAUTION:
Do not reuse gasket.
FILLING
1. Remove the filler plug and gasket.
2. Fill the transfer with new fluid until the fluid level reaches the
specified limit near the filler plug hole.
CAUTION:
Carefully fill fluid. Fill up for approximately 3 minutes.
3. Leave the vehicle for 3 minutes, and check fluid level again.
4. Install the filler plug with a new gasket to the transfer. Tighten to the specified torque. Refer to TF-110,
"OVERHAUL" .
CAUTION:
Do not reuse gasket.
Checking Propeller ShaftELS0010L
Check the front and rear propeller shafts for damage, dents, and cracks. Check the joints for looseness and
any damage. Repair or replace as necessary.
Checking Final Drive OilELS0010M
CAUTION:
If using the vehicle for towing, the rear final drive oil must be replaced as specified. Refer to MA-6,
"Schedule 1" .
NOTE:
Rear final drive shown, front final drive similar.
SM A43 9B
SM A44 4B
Fluid grade:
Refer to MA-10, "
Fluids and Lubricants" .
Fluid capacity:
Refer to MA-10, "
Fluids and Lubricants" .
WDIA0211E