1999 NISSAN FRONTIER boot

VG33E Engine
It is not necessary to replace platinum-
tipped spark plugs as frequently as conven-
tional type spark plugs because they last
much longer.Follow the maintenance schedule, but do
not reuse the spark plugs by cleaning or
regapping.
IAlways replace spark plugs with rec-
commended or equivalent ones.
1. Disconnect spark plug cables. Keep
track of the original cable locations.
When disconnecting, always hold the
boots Ð not the cables. Mark all cables
to identify their original location.
ADI1076
ADI1099ADI1077
8-20Do-it-yourself
ZX

Schedule One
Abbreviations: R = Replace I = Inspect. Correct or replace if necessary. [ ]: At the mileage intervals only
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Perform at number of miles, kilometers
or months, whichever comes first.Miles ý 1,000 3.75 7.5 11.25 15 18.75 22.5 26.25 30 33.75 37.5 41.25 45 48.75 52.5 56.25 60
(km ý 1,000) (6) (12) (18) (24) (30) (36) (42) (48) (54) (60) (66) (72) (78) (84) (90) (96)
Months 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48
Chassis and body maintenance
Brake lines & cablesIIII
Brake pads, rotors, drums & liningsIIIIIIII
Automatic transmission, transfer & differen-
tial gear oil (exc. LSD)See NOTE (1)IIII
Limited-slip differential (LSD) gear oil See NOTE (1) I R I I
Manual transmission oil See NOTE (1) I I I [R]
Steering gear (box) & linkage, axle & suspension partsIIIIIIII
Drive shaft boots & propeller shaft (
) IIIIIIII
Front wheel bearing grease (4x2)II
Front wheel bearing grease & free-running
hub grease (
)See NOTE (2)IRIR
Exhaust systemIIIIIIII
Air bag system See NOTE (3)
NOTE: (1) If towing a trailer, using a camper or a car-top carrier, or driving on rough or muddy roads, change (not just inspect) oil at every 30,000
miles (48,000 km) or 24 months except for LSD. Change LSD gear oil every 15,000 miles (24,000 km) or 12 months.
(2) If operating frequently in water, replace grease every 3,750 miles (6,000 km) or 3 months.
(3) Inspect the supplemental air bag system 10 years after the date of manufacture noted on the FMVSS certification label.
Maintenance9-7
ZX

Schedule Two
Abbreviations: R = Replace I = Inspect. Correct or replace if necessary. [ ]: At the mileage intervals only
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Perform at number of miles, kilometers or
months, whichever comes first.Miles ý 1,000 7.5 15 22.5 30 37.5 45 52.5 60
(km ý 1,000) (12) (24) (36) (48) (60) (72) (84) (96)
Months 6 12 18 24 30 36 42 48
Chassis and body maintenance
Brake lines & cablesIIII
Brake pads, rotors, drums & liningsIIII
Automatic transmission, transfer & differential gear oil (exc. LSD)IIII
Manual transmission oil I I I [R]
Limited-slip differential (LSD) gear oil I R I R
Steering gear (box) & linkage, axle & suspension parts I I
Drive shaft boots (
) IIII
Front wheel bearing grease (4x2) I I
Front wheel bearing grease & free-running hub grease (
)I R I R
Exhaust systemII
Supplemental air bag system See NOTE (1)
NOTE: (1) Inspect the supplemental air bag system 10 years after the date of manufacture noted on the FMVSS certification label.
Maintenance9-9
ZX

EXPLANATION OF
MAINTENANCE 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*Check drive belts for wear,
fraying or cracking and also for proper ten-
sion. Replace any damaged drive belts.
Air cleaner filterUnder normal driving con-
ditions, the air cleaner filter should be re-
placed in accordance with the maintenance
schedule. However, driving the vehicle in
dusty areas may cause rapid clogging of the
element. Consequently, the element may
have to be replaced more frequently.
Positive crankcase ventilation (PCV) fil-
terUnder normal driving conditions, the
filter should be replaced in accordance with
the maintenance schedule. If the vehicle is
operated under extremely adverse weather
conditions or in areas where ambient tem-
peratures are either extremely low or ex-
tremely high, the filter may become cloggedmore rapidly. In such an event, replace the
filter immediately.
EVAP Vapor linesCheck vapor lines and
connections for leaks, looseness, or dete-
rioration. If leaks are found, replace the
lines.
Fuel lines (hoses, piping, connections,
etc.)Check the fuel hoses, piping and con-
nections for leaks, looseness or deteriora-
tion. Replace any damaged parts.
Fuel filterIf the vehicle is operated under
extremely adverse weather conditions or in
areas where ambient temperatures are ei-
ther extremely low or extremely high, the
filter might become clogged. In such an
event, replace the filter immediately.
Engine coolant*Flush and refill the cooling
system.
Engine oil and oil filter*Under 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*Replace with new plugs hav-
ing the correct heat range.
Chassis and body maintenance
Brake lines and cablesCheck 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 and linings
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 and automatic transmission,
transfer and differential gear oilVisually
inspect for signs of leakage and replace oil
for limited-slip differential. Under severe
driving conditions, the oil should be re-
placed at the specified interval.
Steering gear (box) and linkage, axle and
suspension parts and drive shaft boots
Check for damage, looseness and leakage
of oil or grease. Under severe driving con-
ditions, they may have to be inspected more
frequently.
9-10Maintenance
ZX