engine TOYOTA 4RUNNER 1998 Service Manual

4RUNNER (1998)
Your engine is fitted with twin
ground electrode spark plugs.
NOTICE
Use only twin ground electrode
spark plugs for your engine per-formance.
Brake system
TANDEM MASTER CYLINDER
BRAKE SYSTEM
The tandem master cylinder brake
system is a hydraulic system with two
separate sub- systems. If either sub-
system s hould fail, the other will still
work. However, the pedal will be hard-
er to press, and your stopping dis-
tance will be longer. Also, the brake
system warning light may come on.
CAUTION
Do not drive your vehicle with
only a single brake system. Have
your brakes fixed immediately.
BRAKE BOOSTER The brake booster uses engine vacu-
um to power- assist the brakes. If the
engine should quit while you are driv-
ing, you can bring the vehicle to a
stop with normal pedal pressure.
There is enough reserve vacuum for
one or two stopsÐbut no more!
CAUTION

Do not pump the brake pedal if
the engine stalls. Each push on
the pedal uses up your vacuum
reserve.

4RUNNER (1998)
Even if the power assist is
completely lost, the brakes will
still work. But you will have to
push the pedal hardÐmuch
harder than normal. And your
braking distance will be longer.
ANTI- LOCK BRAKE SYSTEM
(with ºABSº warning light)
The anti- lock brake system is de-
signed to automatically help prevent
lock- up of the wheels during sudden
braking or braking on slippery road
surfaces. This assists in providing
directional stab ility and steering per-
formance of the vehicle under these
circumstances.
The anti- lock brake system becomes
operative after the vehicle has accel-
erated to a speed in excess of
approximately 10 km/h (6 mph). It
stops operating when the vehicle de-
celerates to a speed below approxi-
mately 5 km/h (3 mph).
You may hear a sound in the engine
compartment for a few seconds when
the engine is started or just after the
vehicle is started. This means that the
anti- lock brake system is in the self
check mode, and does not indicate a
malfunction. Effective way to press the ºABSº
brake pedal: When the anti- lock brake
system function is in action, you may
feel the brake pedal pulsating and
hear a noise. In this situation, to let
the anti- lock brake system work for
you, just hold the brake pedal down
more firmly. Do not pump the brake.
This will result in reduced braking per-
formance.
The brake pedal pulsation caused by
the anti- lock brake system may indi-
cate hazardous road surface condi-
tions. Although the anti- lock brake
system assists in providing vehicle
control, it is still important to drive
with all due care, because the anti-
lock brake system cannot overcome
the laws of physics that act on your
vehicle:
Braking capab ility is dependent on
tire friction with the road surface.
Even though the anti- lock brake
system is operating, a driver can-
not maintain full control on certain
slippery road surfaces, when cor-
nering at high speeds, or in violent
maneuvers.
Avoid high speeds on wet roads.
The anti- lock brake system cannot
eliminate the risk of hydroplaning
and loss of tire friction. Always maintain a safe distance from
the vehicle in front of you. Compared
with vehicles not fitted with an anti-
lock brake system, your vehicle may
require a longer stopping distance in
the following cases:
Driving on rough, gravel or snow-
covered roads.
Driving with tire chains installed.
Driving on roads where the road
surface is pitted or has other differ-
ences in surface height.
CAUTION
Do not use tires other than the
manufacturer 's designated tires,
and do not mix tires or wheels of
different sizes. You may prevent
the antilock brake system from
operating at full effectiveness.
Vehicles with rear differential lock sys-
tem 'The anti- lock brake system does
not operate when the rear differential
is locked. It is normal operation for
the ºABSº warning light to be on at
this time.

4RUNNER (1998)
The vehicle identification number (VIN)
is also on the Certification Label. ÐEngine number
3RZ-FE
engine
3RZ- FE engine

4RUNNER (1998)
5VZ-FE engine
5VZ- FE engine The engine number is stamped on
the engine block as shown. Your new vehicle carries theft pre-
vention labels which are approxi-
mately 56 mm (2.20 in.) by 16 mm
(0.63 in.).
The purpose of these labels is to re-
duce the incidence of vehicle thefts by
facilitating the tracing and recovery of
parts from stolen vehicles. The label
is designed so that once it is applied
to a surface, any attempt to remove
it will result in destroying the integrity
of the label. Transferring these labels
intact from one part to another, will be
impossible.Theft prevention labels
(except for Canada)

4RUNNER (1998)
Part 3
STARTING AND
DRIVING
Before starting the engine
How to start the engine
Tips for driving in various
conditions
Off- road driving precautions
Winter driving tips
Tr ailer towing
How to save fuel and make
your
vehicle last longer, too
Before starting the engine
1. Check the area around the vehicle before entering it.
2. Adjust seat position, seatback angle, seat cushion angle, head re-
straint height and steering wheel
angle.
3. Adjust inside and outside rear view mirrors.
4. Lock all doors.
5. Fasten seat belts. 1. Apply the parking brake firmly.
2. Turn off unnecessary lights and ac-
cessories.
3. Manual transmission: Press the
clutch pedal to the floor and shift
the transmission into neutral. Hold
the clutch pedal to the floor until
the engine is started. A starter
safety device will prevent the start-
er from operating if the clutch ped-
al is not fully depressed.
Automatic transmission: Put the
selector lever in ºPº. If you need to
restart the engine while the vehicle
is moving, put the selector lever in
ºNº. A starter safety device will pre-
vent the starter from operating if the
selector lever is in any drive position.
4. Automatic transmission only: De-
press the brake pedal and hold it
to the floor until driving off.
How to start the engineÐ
(a) Before cranking

4RUNNER (1998)
(b) Starting the engine
Before starting the engine, be sure to
follow the instructions in º(a) Before
crankingº.
Normal starting procedure
The multiport fuel injection system/se-
quential multiport fuel injection system
in your engine automatically controls
the proper air- fuel mixture for starting.
You can start a cold or hot engine as
follows:
1. With your foot off the accelerator
pedal, crank the engine by turning the
key to ºSTARTº. Release it when the
engine starts.
2. After the engine runs for about 10
seconds, you are ready to drive.
If the weather is below freezing, let
the engine warm up for a few minutes
before driving.
If the engine stalls...
Simply restart it, using the correct
procedure given in normal starting.
If the engine will not startÐ
See ºIf your vehicle will not startº in
Part 4.
NOTICE
Do not crank for more than 30 seconds at a time. This mayoverheat the starter and wiringsystems.
Do not race a cold engine.
If the engine becomes difficult
to start or stalls frequently,have the engine checked im-mediately.
Always slow down in gusty cross-
winds. This will allow you much
better control.
Drive slowly onto curbs and, if
possible, at a right angle. Avoid
driving onto high, sharp- edged ob-
jects and other road hazards. Fail-
ure to do so can lead to severe
tire damage resulting in tire bursts.
When parking on a hill, turn the
front wheels until they touch the
curb so that the vehicle will not
roll. Apply the parking brake, and
place the transmission in ºPº (auto-
matic) or in first or reverse (manu-
al). If necessary, block the wheels.
Washing your vehicle or driving
through deep water may get the
brakes wet. To see whether they
are wet, check that there is no
traffic near you, and then press the
pedal lightly. If you do not feel a
normal braking force, the brakes
are probably wet. To dry them,
drive the vehicle cautiously while
lightly pressing the brake pedal
with the parking brake pulled. If
they still do not work safely, pull to
the side of the road and call a
Toyota dealer for assistance.
Tips for driving in various
conditions

4RUNNER (1998)
Four- wheel drive modelsÐToyota
recommends not using four- wheel
drive on dry hard- surfaced roads,
because four- wheel driving will
cause unnecessary noise and wear,
and poor fuel economy.
Four- wheel drive modelsÐIn cold
temperatures, noise may occur
when driving in two- wheel drive
before the transfer is warmed up.
Therefore, first drive in four- wheel
drive until the transfer is warmed up.CAUTION
Before driving off, make sure
that the parking brake is fully
released and the parking brake
reminder light is off.
Do not leave your vehicle unat-
tended while the engine is run-
ning.
Do not rest your foot on the
brake pedal while driving. It can
cause dangerous overheating,
needless wear, and poor fuel
economy.
To drive down a long or steep
hill, reduce your speed and
downshift. Remember, if you
ride the brakes excessively,
they may overheat and not work
properly.Be careful when accelerating,
upshifting, downshifting or
braking on a slippery surface.
Sudden acceleration or engine
braking, could cause the vehicle
to spin or skid.
Do not drive in excess of the
speed limit. Even if the legal
speed limit permits it, do not
drive over 140 km/h (85 mph)
unless your vehicle has
high- speed capability tires.
Driving over 140 km/h (85 mph)
may result in tire failure, loss
of control and possible injury.
Be sure to consult a tire dealer
to determine whether the tires
on your vehicle are high- speed
capability tires or not before
driving at such speeds.
Do not continue normal driving
when the brakes are wet. If they
are wet, your vehicle will re-
quire a longer stopping dis-
tance, and it may pull to one
side when the brakes are ap-
plied. Also, the parking brake
will not hold the vehicle secure-
ly.

4RUNNER (1998)
The driver and all passengers
should fasten their seat belts
whenever the vehicle is moving.
NOTICE
If driving through water, such
as when crossing shallowstreams, first check the depth of the water and the bottom of
the river bed for firmness. Driveslowly and avoid deep water.
Take all necessary safety mea-
sures to ensure that water dam-age to the engine or other com- ponents does not occur.
Water entering the engine airintake will cause severe engine
damage.
Water can wash the grease fromwheel bearings, causing rustingand premature failure, and mayalso enter the differentials,
transmission and transfer case,reducing the gear oil's lubrica-ting qualities.
Sand and mud that has accum-
lated in brake drums andaround brake discs may affectbraking efficiency and may dam-
age brake system components.
Always perform a maintenanceinspection after each day of
off- road driving that has takenyou through rough terrain,sand, mud, or water. For sche-
duled maintenance information,refer to the separate ºOwner's Manual Supplement/Maintenance
Scheduleº.
Winter driving tips
Make sure you have ethylene- glycol
antifreeze in the radiator.
NOTICE
Do not use alcohol type anti-freeze.
Check the condition of the battery
and cables.
Cold temperatures reduce the capacity
of any battery, so it must be in top
shape to provide enough power for
winter starting. Chapter 7- 3 tells you
how to visually inspect the battery.
Your Toyota dealer and most service
stations will be pleased to check the
level of charge.
Make sure the engine oil viscosity
is suitable for the cold weather.
See Chapter 7- 2 for recommended
viscosity. Leaving a heavy summer oil
in your vehicle during winter months
may cause harder starting. If you are
not sure about which oil to use, call
your Toyota dealerÐhe will be pleased
to help.
Keep the door locks from freezing.
Squirt lock de- icer or glycerine into
the locks to keep them from freezing.
To open a frozen lock, try heating the
key before inserting it.

4RUNNER (1998)
Use a washer fluid containing an
antifreeze solution.
This product is available at your Toyo-
ta dealer and most auto parts stores.
Follow the manufacturer 's directions
for how much to mix with water.
NOTICE
Do not use engine antifreeze or any other substitute because itmay damage your vehicle's paint.
Do not use your parking brake
when there is a possibility it could
freeze.
When parking, put the transmission
into ºPº (automatic) or into first or
reverse (manual) and block the rear
wheels. Do not use the parking brake,
or snow or water accumulated in and
around the parking brake mechanism
may freeze, making it hard to release.
Keep ice and snow from accumulat-
ing under the fenders.
Ice and snow built up under your
fenders can make steering difficult.
During bad winter driving, stop and
check under the fenders occasionally. Depending on where you are driv-
ing, we recommend you carry some
emergency equipment.
Some of the things you might put in
the vehicle are tire chains, window
scraper, bag of sand or salt, flares,
small shovel, jumper cables, etc.
Trailer towing
Your vehicle is designed primarily as
a passenger- and- load- carrying ve-
hicle. Towing a trailer will have an
adverse effect on handling, perfor-
mance, braking, durability and driving
economy (fuel consumption, etc.).
Your safety and satisfaction depend
on the proper use of correct equip-
ment and cautious driving habits. For
your safety and the safety of others,
you must not overload your vehicle or
trailer. Ask your local Toyota dealer
for further details before towing.
WEIGHT LIMITS
Before towing, make sure the total
trailer weight, gross combination
weight, gross vehicle weight, gross
axle weight and trailer tongue load
are all within the limits.
The total trailer weight and tongue
load can be measured with platform
scales found at a highway weighing
station, building supply company,
trucking company, junk yard, etc.

4RUNNER (1998)
CAUTION
The total trailer weight (trailer
weight plus its cargo load)
must not exceed the following.
Exceeding this weight is dan-
gerous. If towing a trailer over
907 kg (2000 lb.), it is neces-
sary to use a sway control de-
vice with a sufficient capacity.
3RZ- FE engine 1587 kg (3500 lb.)
5VZ- FE engine 2267 kg (5000 lb.)
The gross combination weight
(sum of your vehicle weight
plus its load and the total trail-
er weight) must not exceed the
following.
Two- wheel drive models 3RZ- FE engine3447 kg (7600 lb.)
5VZ- FE engine 3992 kg (8800 lb.)
Four- wheel drive models 3RZ- FE engine3583 kg (7900 lb.)
5VZ- FE engine 4173 kg (9200 lb.)