cooling TOYOTA SUPRA 1998 Owners Manual

SUPRA (U)
60
The gauge indicates the engine coolant
temperature when the ignition switch is
on. The engine operating temperature
will vary with changes in weather and
engine load.
If the needle points to the red zone or
higher, stop your vehicle and allow the
engine to cool.
Your vehicle may overheat during severe
operating conditions, such as: Driving up a long hill on a hot day.
Reducing speed or stopping after high
speed driving.
Idling for a long period with the air
conditioning on in stop- and- go traffic.
NOTICE
Do not remove the thermostat in
the engine cooling system as thismay cause the engine to overheat.The thermostat is designed to con-
trol the flow of coolant to keep thetemperature of the engine withinthe specified operating range.
Do not continue driving with anoverheated engine. See ºIf yourvehicle overheatsº in Part 4.
Tachometer
The tachometer indicates engine speed
in thousands of rpm (revolutions per
minute). Use it while driving to select
correct shift points and to prevent en-
gine lugging and overrevving.
Driving with the engine running too fast
causes excessive engine wear and poor
fuel economy. Remember, in most cases
the slower the engine speed, the greater
the fuel economy.
NOTICE
Do not let the indicator needle get
into the red zone. This may causesevere engine damage.
Engine coolant temperature
gauge

SUPRA (U)97
Heating
For best results, set controls to:
For automatic operation
'
Press in the ºAUTO º button.
Temperature ' To the desired
temperature
Air conditioning ' OFF
For manual operation '
Fan speed ' To the desired fan speed
Temperature ' To the desired
temperature
Air intake ' FRESH (outside air)
Air flow ' FLOOR
Air conditioning ' OFF
For quick heating, select recirculated
air for a few minutes. To keep the
windows from fogging, select fresh af-
ter the vehicle interior has been war-
med.
Press the ºA/Cº button on for dehumidi-
fied heating.
Choose floor/windshield air flow to heat
the vehicle interior while defrosting the
windshield. Air conditioning
For best results, set controls to:
For automatic operation
'
Press in the ºAUTO º button .
Temperature ' To the desired
temperature
Air conditioning ' ON
For manual operation '
Fan speed ' To the desired fan speed
Temperature ' To the desired
temperature
Air intake ' FRESH (outside air)
Air flow ' PANEL
Air conditioning ' ON
For quick cooling, move the air intake
selector to recirculate for a few min-
utes. Ventilation
For best results, set controls to:
For automatic operation
'
Press in the ºAUTO º button .
Temperature ' Towards low
temperature
Air conditioning ' OFF
For manual operation '
Fan speed ' To the desired fan speed
Temperature ' To w a r d s low
temperature
Air intake ' FRESH (outside air)
Air flow ' PANEL
Air conditioning ' OFF

SUPRA (U)111
Engine exhaust cautions
CAUTION

Avoid inhaling the engine exhaust.
It contains carbon monoxide, which
is a colorless and odorless gas. It
can cause unconsciousness or even
death.
Make sure the exhaust system has
no holes or loose connections. The
system should be checked from
time to time. If you hit something,
or notice a change in the sound of
the exhaust, have the system
checked immediately.
Do not run the engine in a garage
or enclosed area except for the
time needed to drive the vehicle in
or out. The exhaust gases cannot
escape, making this a particularly
dangerous situation.
Do not remain for a long time in a
parked vehicle with the engine run-
ning. If it is unavoidable, however,
do so only in an unconfined area
and adjust the heating or cooling
system to force outside air into the
vehicle.
Keep the back door closed while
driving. An open or unsealed back
door may cause exhaust gases to
be drawn into the vehicle. If you
must drive with the back door open
to accommodate a large object,
close the windows, open all the
instrument panel vents and have
the heating or cooling system deliv-
er fresh air into the vehicle by turn-
ing the fan to high speed with the
air intake control button in the
OUTSIDE AIR mode.
To allow proper operation of your
vehicle's ventilation system, keep
the inlet grilles in front of the wind-
shield clear of snow, leaves, or oth-
er obstructions.
If you smell exhaust fumes in the
vehicle, drive with the windows
open and the back door closed.
Have the cause immediately located
and corrected.FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of
lubricating and cooling the inside of the
engine, and plays a major role in main-
taining the engine in proper working order.
ENGINE OIL CONSUMPTION
It is normal that an engine should con-
sume some engine oil during normal
engine operation. The causes of oil
consumption in a normal engine are as
follows.
Oil is used to lubricate pistons, piston
rings and cylinders. A thin film of oil
is left on the cylinder wall when a pis-
ton moves downwards in the cylinder.
High negative pressure generated when
the vehicle is decelerating sucks some
of this oil into the combustion chamber.
This oil as well as some part of the oil
film left on the cylinder wall is burned
by the high temperature combustion
gases during the combustion process.
Facts about engine oil
consumption

SUPRA (U)157
CAUTION
When the engine is running, keep
hands, clothing, and tools away
from the moving fan and engine
drive belts. (Removing rings,
watches, and ties is advisable.)
Right after driving, the engine
compartmentÐthe engine, radiator,
exhaust manifold, power steering
fluid reservoir and spark plug
boots, etc.Ðwill be hot. So be care-
ful not to touch them. Oil, fluids
and spark plugs may also be hot.
If the engine is hot, do not remove
the radiator cap or loosen the drain
plugs to prevent burning yourself.
Do not smoke, cause sparks or al-
low open flames around fuel or the
battery. Their fumes are flammable.
Be extremely cautious when work-
ing on the battery. It contains poi-
sonous and corrosive sulfuric acid.
Do not get under your vehicle with
just the body jack supporting it. Al-
ways use automotive jack stands or
other solid supports.
Be sure that the ignition is off if
you work near the electric cooling
fan or radiator grille. With the igni-
tion on, the electric cooling fan will
automatically start to run if the en-
gine coolant temperature is high
and/or the air conditioning is on.
Use eye protection whenever you
work on or under your vehicle
where you may be exposed to flying
or falling material, fluid spray, etc.
Used engine oil contains potentially
harmful contaminants which may
cause skin disorders such as in-
flammation or skin cancer, so care
should be taken to avoid prolonged
and repeated contact with it. To re-
move used engine oil from your
skin, wash thoroughly with soap
and water.
Do not leave used oil within the
reach of children.Dispose of used oil and filter only
in a safe and acceptable manner.
Do not dispose of used oil and fil-
ter in household trash, in sewers or
onto the ground. Call your dealer or
a service station for information
concerning recycling or disposal.
NOTICE
Remember that battery and ignition
cables carry high currents or volt-ages. Be careful of accidentallycausing a short circuit.
Add only demineralized or distilled water to fill the radiator. And if youspill some of the coolant, be sure
to wash it off with water to preventit from damaging the parts or paint.
Do not overfill automatic transmis-sion fluid, or the transmission
could be damaged.
Do not drive with the air cleaner filter removed, or excessive engine
wear could result. also backfiringcould cause s fire in the engine compartment.

SUPRA (U)163
ILSAC certification mark
The ILSAC (International Lubricant Stan-
dardization and Approval Committee) Certi-
fication Mark is displayed on the front of
the container. Look at the see- through coolant reser-
voir when the engine is cold. The cool-
ant level is satisfactory if it is between
the ºFULLº and ºLOWº lines on the
reservoir. If the level is low, add ethyl-
ene- glycol type coolant.
The coolant level in the reservoir will vary
with engine temperature. However, if the
level is on or below the ºLOWº line, add
coolant. Bring the level up to the ºFULLº
line.
Use only ethylene- glycol type coolant.
See information in the next column.
If the coolant level drops within a short
time after replenishing, there may be a
leak in the system. Visually check the
radiator, hoses, radiator cap and drain
cock and water pump.
If you can find no leak, have your Toyota
dealer test the cap pressure and check
for leaks in the cooling system.
CAUTION
To prevent burning yourself, do not
remove the radiator cap when the en-
gine is hot.
Coolant type selection
Your coolant must contain ethylene- glycol
antifreeze. In addition to preventing freez-
ing and subsequent damage to the engine,
this will also prevent corrosion. Further
supplemental inhibitors or additives are
neither needed nor recommended.
Read the antifreeze container for informa-
tion on freeze protection. Follow the
manufacturer 's directions for how much to
mix with water. The total capacity of the
cooling system is given in Part 8. We
recommend 50% solution be used for your
Toyota, or a sufficient quantity to provide
protection to about -35
5C (- 31 5F).
NOTICE
Do not use alcohol type antifreeze or
plain water alone.
Checking the engine coolant level

SUPRA (U)169
NOTICE
Do not attempt to use a tire chain onthe compact spare tire, as it may re-sult in damage to the vehicle as wellas the tire.
Replacing wheels
WHEN TO REPLACE YOUR WHEELS
If you have wheel damage such as
bending, cracks or heavy corrosion, the
wheel should be replaced.
If you fail to replace damaged wheels, the
tire may slip off the wheel or they may
cause loss of handling control.
WHEEL SELECTION
When replacing wheels, care should be
taken to ensure that the wheels are re-
placed by ones with the same load ca-
pacity, diameter, rim width, and offset.
This must be observed on compact spare
tires, too.
Correct replacement wheels are available
at your Toyota dealer.
A wheel of a different size or type may
adversely affect handling, wheel and bear-
ing life, brake cooling, speedometer/odom-
eter calibration, stopping ab ility, headlight
aim, bumper height, vehicle ground clear-
ance, and tire or snow chain clearance to
the body and chassis. Replacement with used wheels is not rec-
ommended as they may have been sub-
jected to rough treatment or high mileage
and could fail without warning. Also, bent
wheels which have been straightened may
have structural damage and therefore
should not be used. Never use an inner
tube in a leaking wheel which is designed
for a tubeless tire.

SUPRA (U)187
COOLING SYSTEM
Total capacity, L (qt., Imp. qt.):
2JZ-GE engine 8.0 (8.5, 7.0)
2JZ- GTE engine
With manual transmission
8.9 (9.4, 7.8)
With automatic transmission
8.8 (9.3, 7.7)
Coolant type:
With ethylene- glycol antifreeze
(Do not use alcohol type.)
BATTERY
Open voltage
*
at 20 C (68 F):
12.6Ð12.8 V Fully charged
12.2Ð12.4 V Half charged
11.8Ð12.0 V Discharged
* : Voltage that is checked 20 minutes after
the key is removed with all the lights
turned off
Charging rates:
5 A max. CLUTCH
Pedal freeplay, mm (in.):
5Ð15 (0.2±0.6)
Fluid type:
SAE J1703 or FMVSS No.116 DOT 3
MANUAL TRANSMISSION
Oil capacity, L (qt., Imp. qt.):
1.8 (1.9, 1.6)
Oil type:
ESSO ATF DEXRON
D- 21065,
TOYOTA GEAR OIL V160 or
equivalent
AUTOMATIC TRANSMISSION
Fluid capacity (drain and ref ill),
L (qt., Imp. qt.):
2JZ- GE engine Up to 1.6 (1.7, 1.4)
2JZ- GTE engine Up to 1.9 (2.0, 1.7)
Fluid type: Automatic transmission fluid TYPE
T - IV or equivalent DIFFERENTIAL
Oil capacity, L (qt., Imp. qt.):
1.35 (1.43 1.19)
Oil type:
Hypoid gear oil API GL- 5
Recommended oil viscosity:
Above ±18
5C (0 5F)
SAE 90
Below ±18 5C (0 5F)
SAE 80W or 80W- 90 BRAKES
Minimum pedal clearance when depressed
with the pressure of 490 N (50 kgf, 110
lbf) with the engine running, mm (in.):
2JZ-GE engine 72 (2.8)
2JZ- GTE engine 70 (2.8)

SUPRA (U)
190
24. CIG 15 A:
Cigarette lighter, air condi-
tioning system, SRS airbag system,
theft deterrent system, shift lock con-
trol system
25. RAD NO.2 7.5 A: Radio, cassette tape
player, power antenna
26. TAIL 10 A: Tail lights, parking lights,
front side marker lights, rear side
marker lights, licence plate lights
27. ECU- IG 10 A: Cruise control system,
anti- lock brake system, power steering,
power antenna, theft deterrent system,
shift lock control system, traction con-
trol system
28. GAUGE 10 A: Gauges and meters, ser-
vice reminder indicators and warning
buzzers (except discharge and open
door warning lights), rear window de-
fogger, charging system, cruise control
system, electronically controlled auto-
matic transmission system, traction
control system
29. ECU- B 10 A: Air conditioning system,
cruise control system, anti- lock brake
system, SRS airbag system, traction
control system
30. OBD - II 7.5A: On- board diagnosis sys-
tem Fuses (type B)
31. DOOR 30 A: Power window, power
door lock system, theft deterrent sys-
tem
32. DEFOG 30 A: Rear window defogger
Fuses (type C)
33. ALT 120 A: Charging system
34. MAIN 50 A: Starter system, headlights
35. HTR 50 A: Air conditioning system
36. FAN 30 A: Electric cooling fans
37. ABS NO.1 60 A: Anti- lock brake sys-
tem, traction control system
38. AM1 50 A: Electronic ignition system/
distributor ignition system
39. POWER 60 A: ºPANELº, ºSTOPº,
ºTAILº, ºECU- Bº, ºDEFOGº and
ºDOORº fuses