2004 NISSAN ALTIMA engine

5. Remove the dipstick again and check the oil
level. It should be between the H (High) and
L (Low) marks
sB. This is the normal oper-
ating oil level range. If the oil level is below
the L (Low) mark
sA, remove the oil filler cap
and pour recommended oil through the
opening.Do not overfill
sC.6. Recheck oil level with the dipstick.
It is normal to add some oil between oil
maintenance intervals or during the
break-in period, depending on the severity
of operating conditions.CAUTION
Oil level should be checked regularly. Op-
erating the engine with an insufficient
amount of oil can damage the engine, and
such damage is not covered by warranty.
CHANGING ENGINE OIL
1. Park the vehicle on a level surface and apply
the parking brake.
2. Start the engine and let it idle until it reaches
operating temperature, then turn it off.
3. Remove the oil filler cap by turning it coun-
terclockwise.
4. Place a large drain pan under the drain plug.
Type A
WDI0213
Type B
WDI0214
QR25DE
WDI0215
8-10Maintenance and do-it-yourself
ZREVIEW COPY:Ð2004 Altima(l30)
Owners Manual(owners)ÐUSA English(nna)
10/13/03Ðtbrooks
X

5. Remove the drain plug with a wrench by
turning it counterclockwise and completely
drain the oil.
If the oil filter is to be changed, remove and
replace it at this time. See “Changing engine
oil filter” later in this section.
WARNING
cProlonged and repeated contact with
used engine oil may cause skin cancer.cTry to avoid direct skin contact with
used oil. If skin contact is made, wash
thoroughly with soap or hand cleaner
as soon as possible.
cKeep used engine oil out of reach of
children.
CAUTION
Be careful not to burn yourself. The engine
oil may be hot.
cWaste oil must be disposed of prop-
erly.
cCheck your local regulations.
6. Clean and reinstall the drain plug and a new
washer. Securely tighten the drain plug with
a wrench. Do not use excessive force.
Drain plug tightening torque:
22 - 29 ft-lb (29 - 39 N·m)
7. Refill engine with recommended oil through
the oil filler opening, then install the oil filler
cap securely.
See “Capacities and recommended
fuel/lubricants” in the “Technical and con-
sumer information” section of this manual for
drain and refill capacity.The drain and refill capacity depends on the
oil temperature and drain time. Use these
specifications for reference only. Always use
the dipstick to determine when the proper
amount of oil is in the engine.
8. Start the engine. Check for leakage around
the drain plug and oil filter. Correct as re-
quired.
9. Turn the engine off and wait more than 10
minutes. Check the oil level with the dipstick.
Add engine oil if necessary.
VQ35DE
WDI0216
Maintenance and do-it-yourself8-11
ZREVIEW COPY:Ð2004 Altima(l30)
Owners Manual(owners)ÐUSA English(nna)
10/13/03Ðtbrooks
X

CHANGING ENGINE OIL FILTER
1. Park the vehicle on a level surface and apply
the parking brake.
2. Turn the engine off.
3. Place a large drain pan under the oil filter.
4. Loosen the oil filter with an oil filter wrench
by turning it counterclockwise. Then remove
the oil filter by turning it by hand.
CAUTION
Be careful not to burn yourself. The engine
oil may be hot.
5. Wipe the engine oil filter mounting surface
with a clean rag.
Be sure to remove any old gasket material
remaining on the mounting surface of the
engine.
6. Coat the gasket on the new filter with clean
engine oil.7. Screw on the oil filter until a slight resistance
is felt, then tighten an additional 2/3 turn.
8. Start the engine and check for leakage
around the oil filter. Correct as required.
9. Turn the engine off and wait more than 10
minutes. Check the oil level. Add engine oil if
necessary.
QR25DE
WDI0217
VQ35DE
WDI0218
8-12Maintenance and do-it-yourself
ZREVIEW COPY:Ð2004 Altima(l30)
Owners Manual(owners)ÐUSA English(nna)
10/13/03Ðtbrooks
X

WARNING
cWhen the engine is running, keep
hands, jewelry and clothing away from
any moving parts such as the cooling
fan and drive belts.
cAutomatic transmission fluid is poison-
ous and should be stored carefully in
marked containers out of the reach of
children.
TEMPERATURE CONDITIONS FOR
CHECKING
cThe fluid level should be checked using the
HOT range on the dipstick after the following
conditions have been met:
– The engine should be warmed up to op-
erating temperature.
– The vehicle should be driven at least 5
minutes.
– The automatic transmission fluid should
be warmed to 122 - 176°F (50 - 80°C) .cThe fluid can be checked at fluid tempera-
tures of 86 - 122°F (30 - 50°C) using the
COLD range on the dipstick after the engine
is warmed up and before driving. However,
the fluid should be re-checked using the
HOT range.
1. Park the vehicle on a level surface and set
the parking brake.
2. Start the engine and then move the shift
selector lever through each gear range, end-
ing in P (Park) .
3. Check the fluid level with the engine idling.
QR25DE
WDI0219
VQ35DE
WDI0220
AUTOMATIC TRANSMISSION FLUID
Maintenance and do-it-yourself8-13
ZREVIEW COPY:Ð2004 Altima(l30)
Owners Manual(owners)ÐUSA English(nna)
10/13/03Ðtbrooks
X

WARNING
Use only new fluid from a sealed con-
tainer. Old, inferior or contaminated fluid
may damage the brake and clutch sys-
tems. The use of improper fluids can dam-
age the brake system and affect the vehi-
cle’s stopping ability.
CAUTION
Do not spill the fluid on any painted sur-
faces. This will damage the paint. If fluid is
spilled, immediately wash the surface
with water.
WINDOW WASHER FLUID
RESERVOIR
Fill the window washer fluid reservoir periodically.
Add window washer fluid when the light comes
on (if so equipped) .
To fill the window washer fluid reservoir, lift the
cap off the reservoir tank and pour the window
washer fluid into the tank opening.
Add a washer solvent to the washer for better
cleaning. In the winter season, add a windshield
washer antifreeze. Follow the manufacturer’s in-
structions for the mixture ratio.Refill the reservoir more frequently when driving
conditions require an increased amount of win-
dow washer fluid.
Recommended fluid is Genuine NISSAN Wind-
shield Washer Concentrate Cleaner & Anti-
freeze or equivalent.
CAUTION
cDo not substitute engine anti-freeze
coolant for window washer solution.
This may result in damage to the paint.
cDo not fill the window washer reservoir
tank with washer fluid concentrates at
full strength. Some methyl alcohol
based washer fluid concentrates may
permanently stain the grille if spilled
while filling the window washer reser-
voir tank.
cPre-mix washer fluid concentrates with
water to the manufacturer’s recom-
mended levels before pouring the fluid
into the window washer reservoir tank.
Do not use the window washer reservoir
tank to mix the washer fluid concen-
trate and water.
WDI0223
WINDOW WASHER FLUID
8-16Maintenance and do-it-yourself
ZREVIEW COPY:Ð2004 Altima(l30)
Owners Manual(owners)ÐUSA English(nna)
10/13/03Ðtbrooks
X

2. Check the fluid level in each cell If it is
necessary to add fluid, add only distilled
water to bring the level up to the bottom of
the filler opening.Do not overfill.Vehicles operated in high temperatures or under
severe conditions require frequent checks of the
battery fluid level.
JUMP STARTING
If jump starting is necessary, see “Jump starting”
in the “In case of emergency” section of this
manual. If the engine does not start by jump
starting, the battery may have to be replaced.
Contact a NISSAN dealer.
1. Power steering fluid pump
2. Water pump
3. Generator
4. Air conditioner (if so equipped)
5. Crank pulley
6. Auto tensioner
WARNING
Be sure the ignition key is in the OFF or
LOCK position. The engine could rotate
unexpectedly.
LDI0302
QR25DE engine
WDI0225
DRIVE BELTS
8-18Maintenance and do-it-yourself
ZREVIEW COPY:Ð2004 Altima(l30)
Owners Manual(owners)ÐUSA English(nna)
10/13/03Ðtbrooks
X

1. Visually inspect each belt for signs of un-
usual wear, cuts, fraying or looseness. If the
belt is in poor condition or is loose, have it
replaced or adjusted by a NISSAN dealer.
2. Have the belts checked regularly for condi-
tion and tension in accordance with the
maintenance schedule found in the
“NISSAN Service and Maintenance Guide”.
1. Power steering fluid pump
2. Crank pulley
3. Generator
4. Air conditionerREPLACING SPARK PLUGS
Platinum-tipped spark plugs
It is not necessary to replace platinum-tipped
spark plugs as frequently as conventional type
spark plugs because they last much longer. Fol-
low the maintenance schedule, but do not reuse
the spark plugs by cleaning or regapping.
cAlways replace spark plugs with rec-
ommended or equivalent ones.
VQ35DE engine
WDI0226WDI0005
SPARK PLUGS
Maintenance and do-it-yourself8-19
ZREVIEW COPY:Ð2004 Altima(l30)
Owners Manual(owners)ÐUSA English(nna)
10/13/03Ðtbrooks
X

WARNING
Be sure the engine and ignition switch are
off and that the parking brake is engaged
securely.
CAUTION
Be sure to use the correct socket to re-
move the spark plugs. An incorrect socket
can damage the spark plugs.
QR25DE
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Remove the coil pack bolt.
4. Remove the coil pack/spark plug boot from
the spark plug.
5. Remove the spark plugs with a spark plug
socket.
The plug socket has a rubber seal that holds
the spark plug so it does not fall when it is
pulled out. Make sure each spark plug is
snugly fitted into the spark plug socket.6. Fit the new plugs, one at a time, into the
spark plug socket and install them.Use
only the specified spark plugs.Turn
each plug several full turns by hand, then
tighten with the spark plug socket to the
correct torque. Do not overtighten.
Spark plug tightening torque:
14 - 22 ft-lb (20 - 29 N·m)
7. Install the coil pack/spark plug boot on the
spark plug by pushing it on until you feel a
snap.
8. Install the coil pack bolt.
Coil pack tightening torque:
48 - 65 in-lb (5.4 - 7.3 N·m)
9. Install the engine cover.
10. Connect the negative battery cable.
VQ35DE
If replacement is required, please see your
NISSAN dealer for assistance.The air cleaner filter should not be cleaned and
reused. Replace it according to the maintenance
intervals shown in the “NISSAN Service and
Maintenance Guide.” When replacing the filter,
wipe the inside of the air cleaner filter housing
and the cover with a damp cloth.
To remove the air cleaner filter:
s1Loosen the screw clamp.
s2Push down on the clips.
s3Disconnect the electrical connector.
4. Remove the air cleaner housing.
WDI0401
AIR CLEANER
8-20Maintenance and do-it-yourself
ZREVIEW COPY:Ð2004 Altima(l30)
Owners Manual(owners)ÐUSA English(nna)
10/13/03Ðtbrooks
X