2018 NISSAN ALTIMA spark plugs replace

8 Do-it-yourself
Maintenance precautions.......................8-2
Engine compartment check locations ...........8-3
Engine cooling system ..........................8-5
Checking engine coolant level ................8-6
Changing engine coolant .....................8-6
Engine oil ........................................8-7
Checking engine oil level .....................8-7
Changing engine oil ..........................8-8
Changing engine oil filter ....................8-10
Continuously Variable Transmission (CVT)
fluid ............................................. 8-11
Power Steering Fluid (PSF) .......................8-11
Brake fluid ...................................... 8-12
Windshield-washer fluid ........................8-13
Windshield-washer fluid reservoir ............8-13
Battery......................................... 8-14
Jump starting ............................... 8-15
Variable voltage control system ................8-16
Drive belt ....................................... 8-16
Spark plugs .................................... 8-17
Replacing spark plugs ....................... 8-17Air cleaner
...................................... 8-18
In-cabin microfilter .......................... 8-19
Windshield wiper blades ........................8-19
Cleaning .................................... 8-19
Replacing ................................... 8-20
Brakes.......................................... 8-21
Fuses ........................................... 8-21
Engine compartment .......................8-22
Passenger compartment ....................8-23
Battery replacement ........................... 8-24
NISSAN Intelligent Key® ......................8-25
Lights .......................................... 8-26
Headlights ................................... 8-26
Fog lights (if so equipped) ...................8-26
Exterior and interior lights ...................8-28
Wheels and tires ................................ 8-31
Tire pressure ................................ 8-31
Tir

e labeling ................................. 8-35
Types of tires ................................ 8-38
Tire chains .................................. 8-39
Changing wheels and tires ..................8-40

1. Crankshaf t pulley
2. Drive belt automatic tensioner pul-ley
3. Generator pulley
4. Air compressor pulley
WARNING
Be sure the ignition switch is placed in
the OFF or LOCK position before servic-
ing drive belt. The engine could rotate
unexpectedly.
1. Visually inspect the 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. It is recom-
mended that you visit a NISSAN dealer
for this service.
2. Have the belt checked regularly for condition and tension in accordance
with the maintenance schedule found
in the "Maintenance and schedules"
section of this manual.
REPLACING SPARK PLUGS
Iridium-tipped spark plugs
It is not necessary to replace iridium-
tipped
Aspark plugs as frequently as con-
ventional type spark plugs because they
last much longer. Follow the maintenance
log shown in the “Maintenance and sched-
ules” section of this manual. Do not service
iridium-tipped spark plugs by cleaning or
regapping.
∙ Always replace spark plugs with rec-
ommended or equivalent ones.
VQ35DE engine
LDI2131SDI1895
SPARK PLUGS
Do-it-yourself8-17

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.
If replacement is required, it is recom-
mended that you visit a NISSAN dealer for
this service.
NOTE:
The air cleaner filter should not be
cleaned and reused.
Replace the air cleaner filter according to
the maintenance log shown in the ”Mainte-
nance and schedules” section of this
manual.
To remove the air cleaner filter:∙ Unlatch the clips and move the air cleaner cover upward.
∙ Remove the air cleaner filter. ∙ Wipe the inside of the air cleaner filter
housing and the cover with a damp
cloth.
QR25DE
LDI2117
VQ35DE
LDI2118
AIR CLEANER
8-18Do-it-yourself

Engine coolant*:Replace coolant at the
specified interval. When adding or replac-
ing coolant, be sure to use only Genuine
NISSAN Long Life Antifreeze/Coolant (blue)
or equivalent with the proper mixture. (For
additional information on the proper mix-
ture for your area, refer to “Engine cooling
system” in the “Do-it-yourself ” section of
this manual.)
NOTE: Mixing any other type of coolant
or the use of non-distilled water may re-
duce the recommended service interval
of the coolant.
Engine oil and oil filter: Replace engine oil
and oil filter at the specified intervals. For
recommended oil grade and viscosity refer
to “Recommended fluids/lubricants and
capacities” in the “Technical and consumer
information” section of this manual.
Engine valve clearance*: Inspect only if
valve noise increases. Adjust valve clear-
ance if necessary.
Evaporative emissions control vapor
lines*: Check vapor lines for leaks or loose-
ness. Tighten connections or replace parts
as necessary.
Fuel filter: Periodic maintenance is not re-
quired. (in-tank type filter) Fuel lines*:
Check the fuel hoses, piping
and connections for leaks, looseness, or
deterioration. Tighten connections or re-
place parts as necessary.
Spark plugs: Replace at specified intervals.
Install new plugs of the type as originally
equipped.
CHASSIS AND BODY
MAINTENANCE:
Brake lines and cables: Visually inspect for
proper installation. Check for chafing,
cracks, deterioration, and signs of leaking.
Replace any deteriorated or damaged
parts immediately.
Brake pads and rotors: Check for wear,
deterioration and fluid leaks. Replace any
deteriorated or damaged parts immedi-
ately.
Exhaust system: Visually inspect the ex-
haust pipes, muffler and hangers for leaks,
cracks, deterioration, and damage. Tighten
connections or replace parts as necessary.
In-cabin microfilter: Replace at specified
intervals. When driving for prolonged peri-
ods in dusty conditions, replace the filter
more frequently. Steering gear and linkage, axle and sus-
pension parts, drive shaf t boots:
Check
for damage, looseness, and leakage of oil
or grease. Under severe driving conditions,
inspect more frequently.
Tire rotation: Tires should be rotated every
5,000 miles (8,000 km) according to the in-
structions under “General maintenance” in
this section. When rotating tires, check for
damage and uneven wear. Replace if nec-
essary.
Transmission fluid/oil: Visually inspect for
signs of leakage at specified intervals.
If using a car-top carrier or driving on rough
or muddy roads:
∙ Replace the CVT fluid every 60,000 miles (96,000 km) or request the dealer to in-
spect the fluid deterioration data using
a CONSULT. If the deterioration data is
more than 210000, replace the CVT fluid.
9-6Maintenance and schedules

EMISSION CONTROL SYSTEM MAINTENANCE
Abbreviations: I = Inspect and correct or replace as necessary, R = Replace
MAINTENANCE OPERATION
Perform at number of miles, kilometers or months, whichever comes first. miles x 1,000
(km x 1,000) Months MAINTENANCE INTERVAL
5
(8) 6 10
(16) 12 15
(24) 18 20
(32) 24 25
(40) 30 30
(48) 36 35
(56) 42 40
(64) 48 45
(72) 54 50
(80) 60 55
(88) 66 60
(96) 72
Drive belts See NOTE (1) I*I*I*
Air cleaner filter See NOTE (2) RR
Engine oil RRRRRRRRRRRR
Engine oil filter RRRRRRRRRRRR
Engine coolant* See NOTE (4)(5)
EVAP vapor lines I*I*I*
Fuel lines I*I*I*
Fuel filter See NOTE (3)
Spark plugs (Iridium - tipped type) See NOTE (6)Replace every 105,000 miles (168,000 km)
Intake and exhaust valve clearances* See NOTE (7)
9-8Maintenance and schedules

Abbreviations: I = Inspect and correct or replace as necessary, R = Replace
MAINTENANCE OPERATION
Perform at number of miles, kilometers or months, whichever comes first. miles x 1,000
(km x 1,000) Months MAINTENANCE INTERVAL
65
(104) 78 70
(112) 84 75
(120) 90 80
(128) 96 85
(136) 102 90
(144) 108 95
(152) 114 100
(160) 120 105
(168) 126 110
(176) 132 115
(184) 138 120
(192) 144
Drive belts See NOTE (1)I*I*I*I*I*I*
Air cleaner filter See NOTE (2) RR
Engine oil RRRRRRRRRRRR
Engine oil filter RRRRRRRRRRRR
Engine coolant* See NOTE (4)(5)
EVAP vapor lines I*I*I*
Fuel lines I*I*I*
Fuel filter See NOTE (3)
Spark plugs (Iridium - tipped type) See NOTE (6)Replace every 105,000 miles (168,000 km)
Intake and exhaust valve clearances* See NOTE (7)
NOTE:
(1) Af ter 40,000 miles (64,000 km) or 48 months, inspect every 10,000 miles (16,000 km) or 12 months. Replace the drive belts if
found damaged.
(2) If operating mainly in dusty conditions, more frequent maintenance may be required.
(3) Periodic maintenance is not required.
(4) First replacement interval is 105,000 miles (168,000 km) or 84 months. Af ter first replacement, replace every 75,000 miles
(120,000 km) or 60 months.
(5) Use only Genuine NISSAN Long Life Antifreeze/Coolant (blue) or equivalent with proper mixture ratio of 50% antifreeze and 50%
demineralized or distilled water. Mixing any other type of coolant or the use of non-distilled water may reduce the life expectancy
of the factory fill coolant.
(6) Replace spark plug when the plug gap exceeds 1.25 mm (0.049 in) even within specified periodic replacement mileage.
(7) Periodic maintenance is not required. However, if valve noise increased, inspect valve clearance.
* Maintenance items and intervals with “*” are recommended by NISSAN 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.
Maintenance and schedules9-9

Armrests ...................1-7
Frontseats..................1-2
Manual front seat adjustment ......1-3
Rearseat.................. .1-6
Security indicator light ............2-17
Security system (NISSAN Vehicle Immobilizer
System), engine start ..........2-32,5-12
Security systems Vehicle security system ..........2-31
Self-adjustingbrakes.............8-21
Service manual order form .........10-21
Servicing air conditioner ...........4-24
Shif ting Continuously Variable Transmission
(CVT) .....................5-16
Shiftleverlockrelease............5-19
Shoulder belt height adjustment ......1-19
Siri® Eyes-Free .................4-50
Spark plug replacement ...........8-17
Spark plugs ...................8-17
Specifications .................10-8
Speedometer ..................2-4
Speedometer and odometer ........2-4
Spotlights(Seemaplight)..........2-55
SRS warning label ...............1-61
Stability control ................5-83
Standard maintenance ............9-7
Starting Before starting the engine ........5-12
Jumpstarting............6-10,8-15
Precautions when starting and
driving .....................5-2
Push starting ................6-12
Starting the engine ............5-13
Starting the engine ..............5-13 Steering
Powersteeringfluid............8-11
Powersteeringsystem .........5-80
Steering wheel .................3-28
Stoplight....................8-28
Storage.....................2-45
Sunglasses case ................2-47
Sunglasses holder ...............2-47
Sunroof (see Moonroof ) ...........2-52
Sunvisors....................3-29
Supplemental air bag warning
light.................... .1-62, 2-15
Supplemental front impact air bag
system ..................... .1-51
Supplemental restraint system Information and warning labels .....1-61
Precautions on supplemental restraint
system ................... .1-44
Supplemental restraint system
(Supplemental air bag system) .......1-44
Switch Autolightswitch..............2-36
Automatic power window switch . . .2-51
Foglightswitch..............2-40
Hazard warning flasher switch ......6-2
Headlight and turn signal switch ....2-35
Headlightcontrolswitch.........2-35
Instrument brightness control .....2-39
Power door lock switch ........3-5,3-6
Rear window and outside mirror
defrosterswitch..............2-35
Turn signal switch .............2-39 T
Tachometer ...................2-5
Temperature gauge Engine coolant temperature gauge . .2-5
Thef t (NISSAN Vehicle Immobilizer System),
engine start ...............2-32,5-12
Three-waycatalyst...............5-2
Tilt Telescopicsteering............3-29
Tire F
lattire..................6-3,6-4
Spare tire ................6-5,8-43
Tire and Loading Information label . .10-12
Tire chains .................8-39
Tire pressure ................8-31
Tirerotation ................8-40
Types of tires ................8-38
Uniform tire quality grading .......10-17
Wheels and tires ..............8-31
Wheel/tire size ...............10-9
Tire pressure Low tire pressure warning light .....2-12
Tire Pressure Monitoring System
(TPMS)....................5-3,6-3
Towing 4-wheel drive models ...........6-14
Flattowing.................10-17
Trailertowing ...............10-17
Towingatrailer................10-17
Towingyourvehicle..............6-13
Transceiver HomeLink® Universal
Transceiver ..........2-56,2-58,2-59
11-6