2001 INFINITI QX4 engine

ItemReference page
Brake pedal and
boosterCheck the pedal for smooth operation and make sure it has the proper dis-
tance under it when depressed fully. Check the brake booster function. Be
sure to keep floor mats away from the pedal.BR-14, ªBrake Pedal and
Bracketº and BR-19,
ªBrake Boosterº
Parking brakeCheck that the lever 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.BR-31, ªParking Brake
Controlº
Automatic transmis-
sion ªParkº 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 ªPº position without applying any brakes.Ð
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).
ItemReference page
Windshield washer
fluidCheck that there is adequate fluid in the tank. Ð
Engine coolant levelCheck the coolant level when the engine is cold. MA-15
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.Ð
Brake fluid levelsMake sure that the brake fluid levels are between the ªMAXº and ªMINº lines
on the reservoir.MA-25
BatteryCheck the fluid level in each cell. It should be between the ªMAXº and ªMINº
lines.Ð
Engine drive beltsMake sure that no belt is frayed, worn, cracked or oily. MA-13
Engine oil levelCheck the level on the dipstick after parking the vehicle on a level spot and
turning off the engine.MA-18
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-27
Automatic transmis-
sion fluid levelCheck the level on the dipstick after putting the selector lever in ªPº 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
substances, 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.Ð
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.Ð
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GENERAL MAINTENANCE
MA-5

Schedule 1NBMA0004S01EMISSION CONTROL SYSTEM MAINTENANCENBMA0004S0101
Abbreviations: R = Replace. I = Inspect. Correct or replace if necessary. [ ]: At the mileage intervals only
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference
Section
- Page or
- Content Title Perform at number of miles, kilo-
meters or months, whichever
comes first.Miles x 1,000
(km x 1,000)
Months3.75
(6)
37.5
(12)
611.25
(18)
915
(24)
1218.75
(30)
1522.5
(36)
1826.25
(42)
2130
(48)
2433.75
(54)
2737.5
(60)
3041.25
(66)
3345
(72)
3648.75
(78)
3952.5
(84)
4256.25
(90)
4560
(96)
48
Drive beltsI* I* MA-13
Air cleaner filter NOTE (1) [R] [R] MA-17
EVAP vapor linesI* I* MA-20
Fuel linesI* I* MA-16
Fuel filter* NOTE (2)MA-16
Engine coolant NOTE (3)R* MA-14
Engine oil RRRRRRRRRRRRRRRRMA-18
Engine oil filter (Use part No.
15208-31U00 or equivalent.)RRRRRRRRRRRRRRRRMA-18
Spark plugs (PLATINUM-TIPPED
type)Replace every 105,000 miles (169,000 km) MA-19
Intake & exhaust valve clearance* NOTE (4)EM-52, ªValve
Clearanceº
NOTE:
(1) If operating mainly in dusty conditions, more frequent maintenance may be required.
(2) When the filter becomes clogged, the vehicle speed cannot be increased as the driver wishes. In such an event, replace the filter.
(3) After 60,000 miles (96,000 km) or 48 months, replace every 30,000 miles (48,000 km) or 24 months.
(4) If valve noise increases, inspect valve clearance.
HMaintenance items and intervals with ª*º are recommended by INFINITI for reliable vehicle operation. The owner need not perform such maintenance in order to maintain the
emission warranty or manufacturer recall liability. Other maintenance items and intervals are required.
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PERIODIC MAINTENANCE
Schedule 1
MA-7

Schedule 2NBMA0004S02EMISSION CONTROL SYSTEM MAINTENANCENBMA0004S0201
Abbreviations: R = Replace. I = Inspect. Correct or replace if necessary. [ ]: At the mileage intervals only
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference Section
- Page
or
- Content Title Perform at number of miles, kilometers
or months, whichever comes first.Miles x 1,000
(km x 1,000)
Months7.5
(12)
615
(24)
1222.5
(36)
1830
(48)
2437.5
(60)
3045
(72)
3652.5
(84)
4260
(96)
48
Drive beltsI* I* MA-13
Air cleaner filter[R] [R] MA-17
EVAP vapor linesI* I* MA-20
Fuel linesI* I* MA-16
Fuel filter* NOTE (1)MA-16
Engine coolant NOTE (2)R* MA-14
Engine oilRRRRRRRRMA-18
Engine oil filter (Use part No. 15208-
31U00 or equivalent.)RRRRRRRRMA-18
Spark plugs (PLATINUM-TIPPED type) Replace every 105,000 miles (169,000 km) MA-19
Intake & exhaust valve clearance* NOTE (3)EM-52, ªValve Clear-
anceº
NOTE:
(1) When the filter becomes clogged, the vehicle speed cannot be increased as the driver wishes. In such an event, replace the filter.
(2) After 60,000 miles (96,000 km) or 48 months, replace every 30,000 miles (48,000 km) or 24 months.
(3) If valve noise increases, inspect valve clearance.
HMaintenance items and intervals with ª*º are recommended by INFINITI for reliable vehicle operation. The owner need not perform such maintenance in order to maintain the
emission warranty or manufacturer recall liability. Other maintenance items and intervals are required.
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PERIODIC MAINTENANCE
Schedule 2
MA-9

NBMA0005
Fluids and LubricantsNBMA0005S01
Capacity (Approximate)
Recommended Fluids/Lubricants
US measure Imp measure Liter
Engine oilDrain and
refillWith oil filter 5-1/4 qt 4-3/8 qt 5.0
IAPI Certification Mark*1
IAPI grade SG/SH, Energy Conserv-
ingI&IIorAPIgrade SJ, Energy
Conserving*1
IILSAC grade GF-I & GF-II*1 Without oil
filter5-1/8 qt 4-1/4 qt 4.8
Dry engine
(Engine overhaul)7-1/4 qt 6 qt 6.8
Cooling system (With reservoir) 9-3/4 qt 8-1/8 qt 9.2Genuine Nissan anti-freeze coolant or
equivalent
All-mode 4WD transfer fluid 3-1/8 qt 2-5/8 qt 3.0Nissan Matic ªDº (Continental U.S. and
Alaska) or Canada NISSAN Automatic
Transmission Fluid*2
Differential
carrier gear
oilFront (4WD) 3-7/8 pt 3-1/4 pt 1.85Standard differential gear: API GL-5*1
Limited-slip differential (LSD) gear:
Use only LSD gear oil API GL-5 and
SAE 80W-90*5 approved for Nissan
LSD*6. Rear 5-7/8 pt 4-7/8 pt 2.8
Automatic transmission fluid2WD
9 qt 7-1/2 qt 8.5Nissan Matic ªDº (Continental U.S. and
Alaska) or Canada NISSAN Automatic
Transmission Fluid*3 4WD
Power steering fluid Ð Ð Ð Genuine NISSAN PSF II or equivalent*7
Brake fluid Ð Ð ÐGenuine Nissan Brake Fluid*4 or
equivalent DOT 3 (U.S. FMVSS No.
116)
Propeller shaft grease Ð Ð ÐNLGI No. 2 (Molybdenum disulphide
lithium soap base)
Multi-purpose grease Ð Ð Ð NLGI No. 2 (Lithium soap base)
*1: For further details, see ªSAE Viscosity Numberº.
*2: Outside the continental United States and Alaska contact an authorized INFINITI dealership for more information regarding suitable
fluids, including recommended brand(s) of DEXRON
TMIII/MERCONTMAutomatic Transmission Fluid.
*3: DEXRONTMIII/MERCONTMor equivalent may also be used. Outside the continental United States and Alaska contact an autho-
rized INFINITI dealership for more information regarding suitable fluids, including recommended brand(s) of DEXRONTMIII/MERCONTM
Automatic Transmission Fluid.
*4: Available in mainland U.S.A. through your INFINITI dealer.
*5: SAE 90 is acceptable in ambient temperatures above þ18ÉC (0ÉF).
*6: Contact an INFINITI dealer for a list of approved oils.
*7: Genuine NISSAN PSF, Canada NISSAN Automatic Transmission Fluid, DEXRON
TMIII/MERCONTMor equivalent ATF may also be
used.
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RECOMMENDED FLUIDS AND LUBRICANTS
Fluids and Lubricants
MA-11

MMA117AA
SAE Viscosity NumberNBMA0005S02GASOLINE ENGINE OILNBMA0005S0201SAE 5W-30 viscosity oil is preferred for all temperatures. SAE
10W-30 and 10W-40 viscosity oil may be used if the ambient tem-
perature is above þ18ÉC (0ÉF).
MMA118A
GEAR OILNBMA0005S020280W-90 for differential is preferable.
SMA947CA
Anti-freeze Coolant Mixture RatioNBMA0005S03The engine cooling system is filled at the factory with a high-quality,
year-round, anti-freeze coolant solution. The anti-freeze solution
contains rust and corrosion inhibitors. Therefore, additional cooling
system additives are not necessary.
CAUTION:
When adding or replacing coolant, be sure to use only a Genu-
ine Nissan anti-freeze coolant or equivalent with the proper
mixture ratio of 50% anti-freeze and 50% demineralized water/
distilled water. Other types of coolant solutions may damage
your engine cooling system.
RECOMMENDED FLUIDS AND LUBRICANTS
SAE Viscosity Number
MA-12

Checking Drive BeltsNBMA0010
SMA091D
1. Inspect belt for cracks, fraying, wear and oil. If necessary,
replace.
2. Inspect drive belt deflection or tension at a point on the belt
midway between pulleys.
3. Check belt tension using belt tension gauge (BT3373-F or
equivalent).
Inspect drive belt deflection or tension when engine is cold.
Adjust if belt deflections exceed the limit or if belt tension is
not within specifications.
Belt deflection and tension
Deflection adjustment Unit: mm (in) Tension adjustment *1 Unit: N (kg, lb)
Used belt
New beltUsed belt
New belt
Limit After adjustment Limit After adjustment
Alternator
Power steering
oil pump
Fan7 (0.28)4-5
(0.16 - 0.20)3.5 - 4.5
(0.138 - 0.177)294 (30, 66)730 - 818 (74.4 -
83.5, 164 - 184)838 - 926 (85.4 -
94.5, 188 - 208)
Air conditioner
compressor12 (0.47)9-10
(0.35 - 0.39)8-9
(0.31 - 0.35)196 (20, 44)348 - 436 (35.5 -
44.5, 78 - 98)470 - 559 (47.9 -
57.0, 106 - 126)
Applied pushing
force98 N (10 kg, 22 lb) Ð
*1 If belt tension gauge cannot be installed at check points shown, check drive belt tension at a different location on the belt.
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ENGINE MAINTENANCE
Checking Drive Belts
MA-13

SMA857C
SMA858C
Changing Engine CoolantNBMA0011WARNING:
To avoid the danger of being scalded, never change the cool-
ant when the engine is hot.
ÐDRAINING ENGINE COOLANTÐNBMA0011S011. Set air conditioning system as follows to prevent coolant from
remaining in the system.
a. Turn ignition switch ªONº and set temperature controller to
maximum hot position.
b. Wait 10 seconds before turning ignition switch ªOFFº.
2. Open radiator drain plug at the bottom of radiator.
3. Remove radiator filler cap.
Remove reservoir tank, drain coolant, then clean reservoir
tank.
Install it temporarily.
IBe careful not to allow coolant to contact drive belts.
SMA092D
SMA093D
SMA094DA
4. Open drain plugs on right side of cylinder block and water
pump side, then open air relief plugs to drain coolant.
5. Check drained coolant for contaminants such as rust, coorro-
sion or discoloration. If contaminated flush engine cooling
system, ªRefer to FLUSHING COOLING SYSTEMº, MA-16.
ENGINE MAINTENANCE
Changing Engine Coolant
MA-14

SMA182B
ÐREFILLING ENGINE COOLANTÐNBMA0011S021. Install reservoir tank, radiator drain plug, and cylinder block
drain plugs.
IApply sealant to the thread of cylinder block drain plugs.
:8-11N´m(0.8 - 1.2 kg-m, 70 - 104 in-lb) Front side
: 18 - 21 N´m (1.8 - 2.2 kg-m, 13 - 15 ft-lb) Right side
2. Fill coolant up to the top of the radiator mouth. While filling,
tighten each air bleeding plug from where coolant overflows.
Fill in the coolant again up to top of the mouth.
3. Reservoir tank with coolant up to the MAX level and install
radiator cap.
Air relief plugs:
: 6.7 - 7.9 N´m (0.68 - 0.81 kg-m, 59 - 70 in-lb)
Use Geniune Nissan anti-freeze coolant or equivalent mixed
with demineralized water/distilled water.
For coolant mixture ratio, refer to ªRECOMMENDED FLUIDS AND
LUBRICANTSº, MA-11.
Coolant capacity (Without reservoir tank):
8.6(9-1/8 US qt, 7-5/8 Imp qt)
SMA412B
Reservoir tank capacity (for MAX level):
0.6(5/8 US qt, 1/2 Imp qt)
Pour coolant through coolant filler neck slowly to allow air in
system to escape.
4. Warm up engine to normal operating temperature.
5. Run engine at 3,000 rpm for 10 seconds and return to idle
speed.
IRepeat 2 or 3 times.
Watch coolant temperature gauge so as not to overheat the
engine.
6. Stop engine and cool it down.
ICool down using a fan to reduce the time.
7. Remove the radiator filler cap and check coolant level.
IIf necessary, refill radiator up to filler neck with coolant.
8. Refill reservoir tank to Max line with coolant.
9. Repeat steps 4 through step 8 two or more times.
10. Warm up engine, and check for sound of coolant flow while
running engine from idle up to 3,000 rpm with heater tempera-
ture control set at several positions between COOL and HOT.
ISound may be noticeable at heater water cock.
11. If sound is heard, bleed air from cooling system by repeating
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ENGINE MAINTENANCE
Changing Engine Coolant (Cont'd)
MA-15