2001 NISSAN SENTRA engine

EXPLANATION OF MAINTE-
NANCE ITEMS
Additional information on the following
items with an ``*'' is found in the ``Do-it-
yourself'' section of this manual.
Emission control system maintenance
Drive belts* ÐCheck drive belts for wear,
fraying or cracking and also for proper ten-
sion. Replace any damaged drive belts.
Air cleaner filter ÐUnder normal driving
conditions, the air cleaner filter should be
replaced in accordance with the mainte-
nance schedule. However, driving the ve-
hicle in dusty areas may cause rapid clog-
ging of the element. Consequently, the
element may have to be replaced more
frequently.
EVAP vapor lines ÐCheck vapor lines and
connections for leaks, looseness or deteriora-
tion. If leaks are found, replace them.
Fuel lines ÐCheck the fuel hoses, piping
and connections for leaks, looseness or
deterioration. Replace any damaged parts.
Engine coolant* ÐDrain and flush the
cooling system.Engine oil & oil filter* ÐUnder normal
driving conditions, the engine oil and oil filter
should be replaced in accordance with the
maintenance schedule. However, under se-
vere driving conditions, they may have to be
replaced more frequently.
Spark plugs* ÐReplace with new plugs
having the correct heat range.
Intake & exhaust valve clearance Ð
Check and adjust the valve clearance.
Chassis and body maintenance
Brake lines & cables ÐCheck the brake
lines and hoses (including brake booster
vacuum hoses, connections & check valve)
and parking brake cables for proper attach-
ment, leaks, cracks, chafing, abrasion, de-
terioration, etc.
Brake pads, rotors, drums & linings Ð
Check these and the other brake compo-
nents for wear, deterioration and leaks. Un-
der severe driving conditions, they may
have to be inspected more frequently.
Manual & automatic transmission fluid*
ÐCheck the fluid level and visually inspect
for signs of leakage. Under severe drivingconditions, the fluid should be replaced at
the specified interval.
Steering gear & linkage, axle & suspen-
sion parts, and drive shaft boots Ð
Check for damage, looseness and leakage
of oil or grease. Under severe driving con-
ditions, inspection should be performed
more frequently.
Exhaust system ÐVisually check the ex-
haust pipes, muffler, and hangers for proper
attachment, leaks, cracks, chafing, abra-
sion, deterioration, etc. Under severe driv-
ing conditions, inspection should be per-
formed more frequently.
Supplemental air bag and supplemental
side air bag (if so equipped) system Ð
Check the supplemental air bag system(s)
components for proper attachment, damage,
deformities, cracks, rust, etc. Work around and
on the supplemental air bag system should be
done by an authorized NISSAN dealer.
9-10Maintenance
ZX

10 Technical and consumer information
Capacities and recommended fuel/lubricants ......10-2
Fuel recommendation ......................................10-3
Engine oil and oil filter recommendation .........10-5
Recommended SAE viscosity number ............10-6
Air conditioner system refrigerant and
lubricant recommendations .............................10-7
Specifications .......................................................10-8
Engine .............................................................10-8
Wheels and tires..............................................10-9
Dimensions and weights .................................10-9
When traveling or registering your vehicle in
another country ..................................................10-10
Vehicle identification ..........................................10-10
Vehicle identification number (VIN)
plate ...............................................................10-10
Vehicle identification number
(chassis number) ...........................................10-10
Engine serial number ....................................10-11
F.M.V.S.S. certification label .........................10-11
Emission control information label ................10-12Tire placard....................................................10-12
Air conditioner specification label ..................10-12
Installing front license plate................................10-13
Vehicle loading information ................................10-14
Terms.............................................................10-14
Determining vehicle load capacity.................10-14
Loading tips ...................................................10-14
Towing a trailer...................................................10-15
Maximum load limits ......................................10-15
Towing load/specification chart .....................10-16
Towing safety ................................................10-16
Uniform tire quality grading ................................10-19
Emission control system warranty .....................10-20
Reporting safety defects (US only) ....................10-20
Readiness for inspection/maintenance (I/M)
test (US only) .....................................................10-20
Owner's manual/service manual order
information .....................................................10-22
In the event of a collision ..............................10-23
ZX

The following are approximate capacities. The actual refill capacities may be a little different. When refilling, follow the procedure
instructed in the ``Do-it-yourself'' section to determine the proper refill capacity.
Capacity (Approximate)
Recommended Fluids and Lubricants
US
measureImp
measureLiter
Fuel 13-1/4 gal 11 gal 50 Unleaded gasoline with an octane rating of at least 87 AKI (RON 91)*1
Engine oil *7
Drain and refill
With oil filter change QG18DE 2-7/8 qt 2-3/8 qt 2.7
cAPI Certification Mark *2 *3
cAPI grade SG/SH, Energy ConservingI&IIorAPIgrade SJ, Energy
Conserving *2 *3
cILSAC grade GF-I & GF-II *2 *3 SR20DE 3-1/2 qt 2-7/8 qt 3.3
Without oil filter change QG18DE 2-5/8 qt 2-1/4 qt 2.5
SR20DE 3-1/4 qt 2-3/4 qt 3.1
Cooling system
With reservoir
50% Genuine NISSAN Anti-freeze coolant or equivalent
50% Soft tap water Manual transmission: SR20DE 7-3/16 qt 6 qt 6.8
QG18DE 7-1/8 qt 5-7/8 qt 6.7
Automatic transmission: SR20DE 7-1/8 qt 5-7/8 qt 6.7
QG18DE 7 qt 5-7/8 qt 6.6
Manual transmission gear oil RS5F70A/V 6-3/8 pt 5-1/4 pt 3.0 API GL-4, Viscosity SAE 75W - 90 only
Automatic transmission fluid
Refill to the proper level according to the instructions in the
``Do-it-yourself'' section.NISSAN Matic `D' (Continental U.S. and Alaska) or Canada NISSAN
Automatic Transmission Fluid.*4
Power steering fluidGenuine NISSAN PSF II or equivalent.*8
Brake and clutch fluidGenuine NISSAN Brake Fluid*5 or equivalent
DOT 3 (US FMVSS No. 116)
Multi-purpose grease Ð Ð Ð NLGI No. 2 (Lithium Soap base)
Air conditioning system refrigerant Ð Ð Ð HFC-134a (R-134a)*6
Air conditioning system lubricantsNISSAN A/C System Lubricant Type R or equivalent*6
*1: For further details, see ``Fuel recommendation.''
*2: For further details, see ``Engine oil and oil filter recommendations.''
*3: For further details, see ``Recommended SAE engine oil viscosity.''
*4: Dexron
TMIII/MerconTMor equivalent may also be used. Outside the Continental United States and Alaska contact an authorized NISSAN dealership for more
information regarding suitable fluids, including recommended brand(s) of DexronTMIII/MerconTMAutomatic Transmission Fluid.
*5: Available in mainland USA through your authorized NISSAN dealer.
*6: For further details, see ªAir conditioner specification label.º
*7: For further details, see ``Changing engine oil.''
*8: Genuine NISSAN PSF, Canada NISSAN Automatic Transmission Fluid, DexronŸ III/MerconŸ, or equivalent ATF may also be used.
CAPACITIES AND
RECOMMENDED FUEL/
LUBRICANTS
10-2Technical and consumer information
ZX

FUEL RECOMMENDATION
Your vehicle is designed to operate on
unleaded gasoline with an octane rating
of at least 87 AKI (Anti-Knock Index)
(Research octane number 91).
CAUTION
cUsing a fuel other than that specified
could adversely affect the emission
control system, and may also affect
the warranty coverage.
cUnder no circumstances should a
leaded gasoline be used since this
will damage the three way catalyst.
Reformulated Gasoline
Some fuel suppliers are now producing re-
formulated gasolines. These gasolines are
specially designed to reduce vehicle emis-
sions. NISSAN supports efforts towards
cleaner air and suggests that you use refor-
mulated gasoline when available.
Gasoline containing oxygenates
Some fuel suppliers sell gasoline containing
oxygenates such as ethanol, MTBE and
methanol with or without advertising theirpresence. NISSAN does not recommend
the use of fuels of which the oxygenate
content and the fuel compatibility for your
NISSAN cannot be readily determined. If in
doubt, ask your service station manager.
If you use oxygenate-blend gasoline, please
take the following precautions as the usage
of such fuels may cause vehicle performance
problems and/or fuel system damage.
cThe fuel should be unleaded and
have an octane rating no lower than
that recommended for unleaded
gasoline.
cIf an oxygenate-blend other than a
methanol blend is used, it should
contain no more than 10% oxygenate.
(MTBE may, however, be added up to
15%.)
cIf a methanol blend is used, it should
contain no more than 5% methanol
(methyl alcohol, wood alcohol). It
should also contain a suitable
amount of appropriate cosolvents
and corrosion inhibitors. If not prop-
erly formulated with appropriate co-
solvents and corrosion inhibitors,
such methanol blends may causefuel system damage and/or vehicle
performance problems. At this time,
sufficient data is not available to en-
sure that all methanol blends are suit-
able for use in NISSAN vehicles.
If any driveability problems such as engine
stalling and hard hot-starting are experi-
enced after using oxygenate-blend fuels,
immediately change to a non-oxygenate
fuel or a fuel with a low blend of MTBE.
Take care not to spill gasoline during
refueling. Gasoline containing oxygen-
ates can cause paint damage.
Aftermarket Fuel Additives
NISSAN does not recommend the use of
any fuel additives (i.e., fuel injector cleaners,
octane boosters, intake valve deposit re-
movers, etc.) which are sold commercially.
Many of these additives intended for gum,
varnish or deposit removal may contain ac-
tive solvents or similar ingredients that can
be harmful to the fuel system and engine.
Octane rating tips
In most parts of North America, you should
use unleaded gasoline with an octane rating
Technical and consumer information
10-3
ZX

of at least 87 AKI (Anti-Knock Index). How-
ever, you may use unleaded gasoline with
an octane rating as low as 85 AKI (Anti-
Knock Index) in high altitude areas (over
4,000 ft [1,219 m]) such as: Colorado, Mon-
tana, New Mexico, Utah, Wyoming, north-
eastern Nevada, southern Idaho, western
South Dakota, western Nebraska, and the
part of Texas which is directly south of New
Mexico.
Using unleaded gasoline with an octane
rating lower than stated above can cause
persistent, heavy ``spark knock.'' (``Spark
knock'' is a metallic rapping noise.) If
severe, this can lead to engine damage. If
you detect a persistent heavy spark
knock even when using gasoline of the
stated octane rating, or if you hear steady
spark knock while holding a steady
speed on level roads, have an authorized
NISSAN dealer correct the condition.
Failure to correct the condition is misuse
of the vehicle, for which NISSAN is not
responsible.
Incorrect ignition timing may result in spark
knock, after-run and/or overheating, which
may cause excessive fuel consumption or
engine damage. If any of the above symp-toms are encountered, have your vehicle
checked at an authorized NISSAN dealer or
other competent service facility.
However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is
not a cause for concern, because you
get the greatest fuel benefit when there
is light spark knock for a short time
under heavy engine load.
10-4Technical and consumer information
ZX

ENGINE OIL AND OIL FILTER
RECOMMENDATION
Selecting the correct oil
It is essential to choose engine oil with the
correct quality and viscosity to ensure sat-
isfactory engine life and performance. NIS-
SAN recommends the use of a low friction
oil (energy conserving oil) in order to im-
prove fuel economy and conserve energy.
Oils which do not have the specified quality
label should not be used as they could
cause engine damage.
Only those engine oils with the AmericanPetroleum Institute (API) CERTIFICATION
MARK on the front of the container should
be used. This type of oil supersedes the
existing API SG, SH, or SJ and Energy
ConservingI&IIcategories.
If you cannot find engine oil with the API
CERTIFICATION MARK, use an API grade
SG/SH, Energy ConservingI&IIorAPI
grade SJ, Energy Conserving oil. An oil with
a single designation SG or SH, or in combi-
nation with other categories (for example,
SG/CC or SG/CD) may also be used if one
with the API CERTIFICATION MARK can-
not be found. An ILSAC grade GF-I & GF-II
oil can also be used.Mineral based or synthetic type oils may be
used in your NISSAN vehicle. However,
these oils must meet the API quality and
SAE viscosity ratings specified for your ve-
hicle. Do not mix mineral based and syn-
thetic type oils in the engine.
Oil additives
NISSAN does not recommend the use of oil
additives. The use of an oil additive is not
necessary when the proper oil type is used
and maintenance intervals are followed.
Oil which may contain foreign matter or has
been previously used should not be used.
Oil viscosity
The engine oil viscosity or thickness
changes with temperature. Because of this,
it is important to select the engine oil viscos-
ity based on the temperatures at which the
vehicle will be operated before the next oil
change. The chart ``Recommended SAE
viscosity number'' shows the recommended
oil viscosities for the expected ambient tem-
peratures. Choosing an oil viscosity other
than that recommended could cause seri-
ous engine damage.
ATI0645
Technical and consumer information10-5
ZX

Selecting the correct oil filter
Your new NISSAN vehicle is equipped with
a high-quality genuine NISSAN oil filter.
When replacing, use a genuine NISSAN oil
filter or its equivalent for the reason de-
scribed in ``Change intervals''.
Change intervals
The oil and oil filter change intervals for your
engine are based on the use of the specified
quality oils and filters. Oil and filter other
than the specified quality, or oil and filter
change intervals longer than recommended
could reduce engine life. Damage to the
engine caused by improper maintenance or
use of incorrect oil and filter quality and/or
viscosity is not covered by the new NISSAN
vehicle warranties.
Your engine was filled with a high quality
engine oil when it was built. You do not have
to change the oil before the first recom-
mended change interval. Oil and filter
change intervals depend upon how you use
your vehicle.Operation under the following conditions
may require more frequent oil and filter
changes:
Ð repeated short distance driving at cold
outside temperatures,
Ð driving in dusty conditions,
Ð extensive idling,
Ð towing a trailer.
RECOMMENDED SAE
VISCOSITY NUMBER
cSAE 5W-30 viscosity oil is preferred for
all temperatures. SAE 10W-30, SAE
10W-40 viscosity oils may be used if the
ambient temperature is above 0ÉF (-18ÉC).
ATI1028
10-6Technical and consumer information
ZX

ENGINE
ModelQG18DE SR20DE
Type Gasoline, 4-cycle, DOHC Gasoline, 4-cycle, DOHC
Cylinder arrangement 4-cylinder in-line 4-cylinder in-line
Bore ý Stroke in (mm) 3.150 ý 3.465 (80.0 ý 88.0) 3.386 ý 3.386 (86.0 ý 86.0)
Displacement cu in (cm
3) 107.94 (1,769) 121.92 (1,998)
Firing order1-3-4-2 1-3-4-2
Idle speed rpm
See the ``Emission Control label'' on the underside of the hood. Ignition timing degree (B.T.D.C.) at idle speed
degree/rpm
CO percentage at idle speed
[No air] %
Platinum-tipped type Platinum-tipped type Conventional type
Spark plug Hot PLFR4A-11 *1 Ð Ð
Standard PLFR5A-11 *1 PFR5G-11 *1 BKR5E *1
Cold PLFR6A-11 *1 PFR6G-11 *1, PFR7G-11 *1 BKR6E *1, BKR7E *1
Camshaft operation Timing chain Timing chain
Spark plug gap (Nominal) in (mm) 0.043 (1.1) 0.043 (1.1) 0.031 to 0.035 (0.8 to 0.9)
Generator belt size
Width ý Length in (mm)0.843 x 32.28, (21.4 x 820)
0.843 x 44.09, (21.4 x 1,120)*10.559 x 32.68, (14.2 x 830)
0.843 x 40.75, (21.4 x 1,035)*1
*1: Always check with the Parts Department at an authorized NISSAN dealer for the latest parts information.
*2: With air conditioner
The spark ignition system of this vehicle meets all requirements of the Canadian Interference-Causing Equipment Regulations.
SPECIFICATIONS
10-8Technical and consumer information
ZX