cooling NISSAN SENTRA 2021 User Guide

The engine cooling system is filled at the
factory with a pre-diluted mixture of 50%
Genuine NISSAN Long Life Antifreeze/
Coolant (blue) and 50% water to provide
year-round antifreeze and coolant protec-
tion. The antifreeze solution contains rust
and corrosion inhibitors. Additional engine
cooling system additives are not neces-
sary.CAUTION
• Never use any cooling system addi-
tives such as radiator sealer. Addi-
tives may clog the cooling system
and cause damage to the engine,
transmission and/or cooling system.
• When adding or replacing coolant, be
sure to use only Genuine NISSAN
Long Life Antifreeze/Coolant (blue)
or equivalent. Genuine NISSAN Long
Life Antifreeze/Coolant (blue) is pre-
diluted to provide antifreeze protec-
tion to -34° F (-37° C). If additional
freeze protection is needed due to
weather where you operate your ve-
hicle, add Genuine NISSAN Long Life
Antifreeze/Coolant (blue) concen-
trate following the directions on the
container. If an equivalent coolant
other than Genuine NISSAN Long Life
Antifreeze/Coolant (blue) is used, fol-
low the coolant manufacturer’s in-
structions to maintain minimum an-
tifreeze protection to -34° F (-37° C).
The use of other types of coolant so-
lutions other than Genuine NISSAN
Long Life Antifreeze/Coolant (blue)
or equivalent may damage the en-
gine cooling system. •
The life expectancy of the factory-fill
coolant is 105,000 miles (168,000 km)
or 7 years. Mixing any other type of
coolant other than Genuine NISSAN
Long Life Antifreeze/Coolant (blue)
(or equivalent cooling), including
Genuine NISSAN Long Life
Antifreeze/Coolant (green), or the
use of non-distilled water may re-
duce the life expectancy of the
factory-fill coolant. For additional in-
formation, refer to the “Maintenance
and schedules” section of this
manual.
ENGINE COOLING SYSTEM
Do-it-yourself8-5

CHECKING ENGINE COOLANT
LEVEL
Check the coolant levelin the reservoir
when the engine is cold. If the coolant
level is below the MIN level
OB, add coolant
to the MAX level
OA.
This vehicle contains Genuine NISSAN Long
Life Antifreeze/Coolant (blue). The life ex-
pectancy of the factory-fill coolant is
105,000 miles (168,000 km) or 7 years. Mixing
any other type of coolant or the use of
non-distilled water will reduce the life ex-
pectancy of the factory-fill coolant. For ad- ditional information, refer to the “Mainte-
nance and schedules” section of this
manual.
If the cooling system frequently requires
coolant, have it checked. It is recom-
mended that you visit a NISSAN dealer
for this service.
For additional information on the location
of the engine coolant reservoir, refer to “En-
gine compartment check locations” in this
section.
CHANGING ENGINE COOLANT
A NISSAN dealer can change the engine
coolant. The service procedure can be
found in the NISSAN Service Manual.
Improper servicing can result in reduced
heater performance and engine over-
heating.
WARNING
• To avoid the danger of being scalded,
never change the coolant when the
engine is hot.
• Never remove the engine coolant
reservoir cap when the engine is hot.
Serious burns could be caused by
high pressure fluid escaping from the
system. •
Avoid direct skin contact with used
coolant. If skin contact is made, wash
thoroughly with soap or hand
cleaner as soon as possible.
• Keep coolant out of the reach of chil-
dren and pets.
Engine coolant must be disposed of prop-
erly. Check your local regulations.
LDI3495
8-6Do-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, rotors, drums and linings:
Check for wear, deterioration and fluid
leaks. Replace any deteriorated or dam-
aged parts immediately.
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
7,500 miles (12,000 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 manual transaxle gear oil ev- ery 20,000 miles or 24 months.
• 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

Bulb replacement...............8-26
C
C.M.V.S.S. certification label.........10-13Capacities and recommended
fuel/lubricants.................10-2Car phone or CB radio............4-67Cargo
(See vehicle loading information).....10-15Chassis control................5-119Check tire pressure..........2-30, 2-47Child restraints.......1-21,1-22,1-23,1-25LATCH (Lower Anchors and Tethers for
CHildren) System..............1-25Precautions on child
restraints............1-30, 1-36, 1-41Top tether strap anchor point
locations...................1-28Child safety rear door lock..........3-7Cleaning exterior and interior......7-2,7-5Clutch
Clutch fluid..................8-11Cold weather driving............5-125Console box................. .2-68Continuously Variable Transmission
(CVT).......................5-16Continuously Variable Transmission (CVT)
fluid......................8-10Driving with Continuously Variable
Transmission (CVT)............5-16Control panel buttons.............4-3Brightness/contrast button.......4-8
Controls
Audio controls (steering wheel).....4-63Heater and air conditioner
controls................4-33, 4-41CoolantCapacities and recommended
fuel/lubricants
...............10-2Changing engine coolant.........8-6Checking engine coolant level......8-6Engine coolant temperature gauge. . .2-6Corrosion protection..............7-8Cruise control................ .5-58Cup holders................. .2-69
D
Daytime Running Light System......2-59Defroster switch
Rear window and outside mirror defroster
switch
................... .2-55Diesel Particulate Filter (DPF)........2-51Dimensions and weights..........10-11Dimmer switch for instrument panel. . .2-60Display controls (see control panel
buttons).................... .4-3Door locks....................3-4Drive belt....................8-14Driving
Cold weather driving...........5-125Driving with Continuously Variable
Transmission (CVT)............5-16Driving with manual transmission. . .5-21
Precautions when starting and
driving.................... .5-4Driving the vehicle...............5-16
E
E-call (SOS) Button..............2-64ECO mode switch...............5-25Economy - fuel................5-111Emergency engine shutoff.......5-13,6-2Emission control information label. . . .10-13Emission control system warranty. . . .10-20Engine
Before starting the engine........5-14Capacities and recommended
fuel/lubricants...............10-2Changing engine coolant.........8-6Changing engine oil.............8-7Changing engine oil filter.........8-7Checking engine coolant level......8-6Checking engine oil level..........8-7Engine compartment check
locations.................. .8-4Engine coolant temperature gauge. . .2-6Engine cooling system...........8-5Engine oil...................8-7Engine oil and oil filter
recommendation.............10-7Engine oil pressure warning light. . . .2-10Engine oil viscosity.............10-7Engine serial number..........10-13Engine specifications...........10-9Starting the engine............5-14
11-2Index