1997 TOYOTA CELICA cooling

60
The gauge indicates the engine cool-
ant temperature when the ignition
switch is on. The engine operating
temperature will vary with changes in
weather and engine load.
If the needle moves into the red zone,
your engine is too hot. If your vehicle
overheats, 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 con-
ditioning on in stop-and-go traffic.

Towing a trailer
NOTICE
Do not remove the thermostat in
the engine cooling system as this
may cause the engine to overheat. The thermostat is designed tocontrol the flow of coolant to keep
the temperature of the engine within the specified operatingrange.
Do not continue driving with an
overheated engine. See If yourvehicle overheatsº in Part 4.The tachometer indicates engine
speed in thousands of rpm (revolu-
tions per minute). Use it while driving
to select correct shift points and to
prevent engine lugging and overrev-
ving.
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 cause
severe engine damage.
Tachometer
Engine coolant temperature
gauge
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Heating
For best results, set controls to:Fan speedÐAny setting except OFFº
Temperature Ð Towards WARM
(red zone)
Air intakeÐ FRESH (outside air)
Air flowÐ FLOOR
Air Conditioning ÐOFF

For quick heating, select recirculated
air for a few minutes. To keep the win-
dows from fogging, select fresh after
the vehicle interior has been warmed.

Press the A/Cº button on for dehumid-
ified heating.

Choose floor/windshield air flow to
heat the vehicle interior while defrost-
ing or defogging the windshield. Air conditioning
For best results, set controls to:
Fan speedÐAny setting except OFFº
Temperature Ð Towards COLD
(blue zone)
Air intakeÐ FRESH (outside air)
Air flowÐ PANEL
Air Conditioning ÐON
For quick cooling, move the air intake
selector to recirculate for a few min-
utes.
Ventilation
For best results, set controls to:
Fan speedÐAny setting except OFFº
Temperature Ð Towards COLD
(blue zone)
Air intakeÐ FRESH (outside air)
Air flowÐ PANEL
Air conditioning ÐOFF
Defogging and defrosting
The inside of the windshield
For best results, set controls to:
Fan speedÐAny setting except OFFº
Temperature Ð Towards WARM
(red zone) to heat;
COLD (blue zone)
to cool
Air intake -FRESH (outside air)
Air flow -WINDSHIELD
Vehicles with A/Cº button-
Pressing the windshield button turns on
the defroster-linked air conditioning. At
this time, the A/Cº button indica tor comes
on regardless of whether or not the A/Cº
button is pressed in. This is to clean up the
front view more quickly.
When the A/Cº button is not pressed in,
pressing another airflow button turns off
the air conditioning.

On humid days, do not blow cold air on
the windshieldÐthe difference be-
tween the outside and inside tempera-
tures could make the fogging worse.
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11 8
Do not allow the engine to run atidle speed for more than 20 min-utes.
Avoid racing the engine.Do not push-start or pull-start
your vehicle.
Do not turn off the ignition whilethe vehicle is moving.
Keep your engine in good running
order. Malfunctions in the engine electrical system, electronic igni-tion system/distributor ignition
system or fuel system couldcause an extremely high three-
way catalytic converter tempera-ture.
If the engine becomes difficult tostart or stalls frequently, take your
vehicle in for a check-up as soon
as possible. Remember, your To-yota dealer knows your vehicle
and its three-way catalytic con-verter system best.
To ensure that the three-way cata-lytic converter and the entire
emission control system operateproperly, your vehicle must re-ceive the periodic inspections re-
quired by the T oyota Maintenance
Schedule. For scheduled mainte-
nance information, refer to theseparate Owner's Manual Sup-
plement/Maintenance Scheduleº.
CAUTION!

Avoid inhaling the engine ex-
haust. It contains carbon monox-
ide, which is a colorless and odor-
less gas. It can cause uncon-
sciousness or even death.

Make sure the exhaust system
has no holes or loose connec-
tions. 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
running. If it is unavoidable, how-
ever, do so only in an unconfined
area and adjust the heating or
cooling system to force outside
air into the vehicle.

Keep the trunk lid or back door
closed while driving. An open or
unsealed trunk lid or back door
may cause exhaust gases to be
drawn into the vehicle. If you
must drive with the trunk or back
door lid open to accommodate a
large object, close the windows,
open all the instrument panel
vents and have the heating or
cooling system deliver fresh air
into the vehicle by turning the fan
to high speed with the air intake
control lever set at the outside air
position.

To allow proper operation of your
vehicle's ventilation system, keep
the inlet grilles in front of the
windshield clear of snow, leaves,
or other obstructions.

If you smell exhaust fumes in the
vehicle, drive with the windows
open and the trunk lid or back
door closed. Have the cause im-
mediately located and corrected.
Engine exhaust cautions
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11 9
FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of lubri-
cating and cooling the inside of the engine,
and plays a major role in maintaining 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 piston
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 com-
bustion gases during the combustion
process.

Oil is also used to lubricate the stems
of the intake valves. Some of this oil
is sucked into the combustion cham-
ber together with the intake air and is
burned along with the fuel. High tem-
perature exhaust gases also burn the
oil used to lubricate the exhaust valve
stems. The amount of engine oil consumed
depends on the viscosity of the oil, the
quality of the oil and the conditions
the vehicle is driven under.
More oil is consumed by high- speed driving
and frequent acceleration and deceleration.
A new engine consumes more oil, since its
pistons, piston rings and cylinder walls have
not become conditioned.
When judging the amount of oil con-
sumption, note that the oil may be-
come diluted and make it difficult to
judge the true level accurately.
As an example, if a vehicle is used for re-
peated short trips, and consumes a normal
amount of oil, the dipstick may not show
any drop in the oil level at all, even after
1000 km (600 miles) or more. This is be-
cause the oil is gradually becoming diluted
with the fuel or moisture, making it appear
that the oil level has not changed.
The diluting ingredients evaporate out
when the vehicle is then driven at high
speeds, as on an expressway, making it
appear that oil is excessively consumed
after driving as high speeds.
IMPORTANCE OF ENGINE OIL LEVEL
CHECK
One of the most important points in proper
vehicle maintenance is to keep the engine
oil at the optimum level so that oil function
will
not be impaired. Therefore, it is essen-
tial that the oil level be checked regularly.
Toyota recommends that the oil level be
checked every time you refuel the vehicle.
NOTICE
Failure to check the oil level regularly could lead to serious
engine trouble due to insufficientoil.
For detailed information on the oil level
check, see Checking the engine oil levelº
in Chapter 7-2.
Facts about engine oil
consumption
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140
Do not connect it to or near any part that
moves when the engine is cranked.
NOTICE
When making the connections, to avoid serious injury, do not lean
over the battery or accidentally letthe jumper cables or clamps touchanything except the correct batteryterminals or the ground.
5. Start your engine in the normal way. Af-
ter starting, run it at about 2000 rpm for
several minutes with the accelerator ped-
al lightly depressed.
6. Carefully disconnect the cables in the
exact reverse order: the negative cable
and then the positive cable.
7. Carefully dispose of the battery cover
clothsÐthey may now contain sulfuric
acid.
8. If removed, replace all the battery vent
plugs.
If the cause of your battery discharging is
not apparent (for example, lights left on),
you should have it checked. If your engine stalls while driving
0
1. Reduce your speed gradually, keep-
ing a straight line. Move cautiously off the
road to a safe place.
2. Turn on your emergency flashers.
3. Try starting the engine again.
If the engine will not start, see If your ve-
hicle will not startº.
If the engine is not running, the
power assist for the brakes and
steering will not work so steering
and braking will be much harder
than usual. CAUTION
!
If your engine coolant temperature
gauge indicates overheating, if you
experience a loss of power, or if you
hear a loud knocking or pinging noise,
the engine has probably overheated.
You should follow this procedure
0
1. Pull safely off the road, stop the ve-
hicle and turn on your emergency flash-
ers. Put the transmission in Pº (automat-
ic) or neutral (manual) and apply the
parking brake. Turn off the air conditioning
if it is being used.
2. If coolant or steam is boiling out of the
radiator or reservoir, stop the engine. Wait
until the steam subsides before opening
the hood. If there is no coolant boiling over
or steam, leave the engine running and
make sure the electric cooling fan is oper-
ating. If it is not, turn the ignition off.
To help avoid personal injury, keep
the hood closed until there is no
steam. Escaping steam or coolant is
a sign of very high pressure. CAUTION
!
3. Visually check to see if the engine drive
belt (water pump belt) is broken or loose.
Look for obvious coolant leaks from the ra-
diator, hoses, and under the vehicle. How-
ever, note that water draining from the air
conditioning is normal if it has been used.
If your engine stalls while
driving
If your vehicle overheats
(7A-FE engine)
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141
When the engine is running, keep
hands and clothing away from the
moving fan and engine drive belts.CAUTION
!
4. If the engine drive belt is broken or the
coolant is leaking, stop the engine imme-
diately. Call a Toyota dealer for assis-
tance.
5. If the engine drive belt is O.K. and
there are no obvious leaks, check the
coolant reservoir. If it is dry,
add coolant to
the reservoir while the engine is running.
Fill it about half full.
Do not attempt to remove the radiator
cap when the engine and radiator are
hot. Serious injury could result from
scalding hot fluid and steam blown
out under pressure. CAUTION
!
6. After the engine coolant temperature
has cooled to normal, again check the
coolant
level in the reservoir. If necessary,
bring it up to half full again. Serious cool-
ant loss indicates a leak in the system.
You should have it checked as soon as
possible at your Toyota dealer. If your engine coolant temperature
gauge indicates overheating, if you
experience a loss of power, or if you
hear a loud knocking or pinging noise,
the engine has probably overheated.
You should follow this procedure
0
1. Pull safely off the road, stop the ve-
hicle and turn on your emergency flash-
ers. Put the transmission in Pº (automat-
ic) or neutral (manual) and apply the
parking b rake. Turn off the air conditioning
if it is being used.
2. If coolant or steam is boiling out of the
radiator or reservoir, stop the engine. Wait
until the steam subsides before opening
the hood. If there is no coolant boiling over
or steam, leave the engine running and
make sure the electric cooling fan is oper-
ating. If it is not, turn the ignition off.
To help avoid personal injury, keep
the hood closed until there is no
steam. Escaping steam or coolant is
a sign of very high pressure. CAUTION
!
3. Look for obvious coolant leaks from
the radiator, hoses, and under the vehicle.
However, note that water draining from
the air conditioning is normal if it has been
used.
When the engine is running, keep
hands and clothing away from the
moving fan and engine drive belts.
CAUTION
!
4. If the coolant is leaking, stop the en-
gine immediately.
Call a Toyota dealer for
assistance.
5. If there are no obvious leaks, check
the coolant reservoir. If it is dry, add cool-
ant to the reservoir while the engine is
running. Fill it about half full.
Do not attempt to remove the radiator
cap when the engine and radiator are
hot. Serious injury could result from
scalding hot fluid and steam blown
out under pressure. CAUTION
!
6. After the engine coolant temperature
has cooled to normal, again check the
coolant
level in the reservoir. If necessary,
bring it up to half full again. Serious cool-
ant loss indicates a leak in the system.
You should have it checked as soon as
possible at your Toyota dealer.
If your vehicle overheats
(5S-FE engine)
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1. Engine oil level dipstick
2. Power steering fluid reservoir
3. Brake fluid reservoir
4. Fuse blocks
5. Battery
6. Engine coolant reservoir
7. Electric cooling fans
8. Engine oil filler cap
9. Windshield and rear window washerfluid tank
Engine compartment overview

7A-FE engine
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1. Power steering fluid reservoir
2. Engine oil filler cap
3. Brake fluid reservoir
4. Fuse blocks
5. Battery
6. Engine coolant reservoir
7. Electric cooling fans
8. Engine oil level dipstick
9. Windshield and rear window washerfluid tank


5S-FE engine
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