cooling TOYOTA TACOMA 1996 Owners Manual

48
The gauge indicates the engine cool-
ant temperature when the ignition
switch is on. The engine operating
temperature will vary with changes inweather and engine load.
If the needle moves into the red zone, your engine is too hot. If your vehicle over-
heats, stop your vehicle and allow the en-
gine 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 (revolutions per
minute). Use it while driving to select
correct shift points and to prevent en-
gine lugging and overr evving.
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

90Heating
For best results, set controls to:
Fan speed ÐAny setting except OFFº
Temperature Ð Towards WARM
(red zone)
Air intake ÐFRESH (outside air)
Air flow ÐFLOOR
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 speed ÐAny setting except OFFº
Temperature Ð Towards COLD
(blue zone)
Air intake ÐFRESH (outside air)
Air flow ÐPANEL
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 speed ÐAny setting except OFFº
Temperature Ð Towards COLD
(blue zone)
Air intake ÐFRESH (outside air)
Air flow ÐPANEL
Air conditioning ÐOFF
Defogging The inside of the windshield For best results, set controls to:
Fan speed ÐAny setting except OFFº
Temperature Ð Towards WARM
(red zone) to heat; COLD (blue zone) to
cool
Air intake ÐFRESH (outside air)
Air flow ÐWINDSHIELD
Air conditioning ÐON
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.
Defrosting The outside of the windshield For best results, set controls to:
Fan speed ÐAny setting except OFFº
Temperature Ð Towards WARM
(red zone)
Air intake ÐFRESH (outside air)
Air flow ÐWINDSHIELD
Air conditioning ÐOFF
To heat the vehicle interior while de-
frosting the windshield, choose floor/
windshield air flow.

101
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 connections. The system should be checked
from time to time. If you hit some-
thing, 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 particularlydangerous 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.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. Have the cause immediately located and corrected.
Toyota does not recommend occu- pying the rear cargo area when it is
fitted with a slide-in camper,
camper shell or other type cover
while the engine is running. This
caution applies to both driving and
stopped or parked situations with
the engine running. Particular care
should be t aken to prevent exhaust
gases from entering camper bod-
ies, trailers or other enclosures on
or around your vehicle. If exhaust
fumes are detected, open all win-
dows and thoroughly ventilate the area. FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of lu-
bricating and cooling the inside of the en-
gine,
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 combustion 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 chamber
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 valvestems.
Facts about engine oilconsumption
Engine exhaust cautions

157
Look at the see-through coolant res-
ervoir when the engine is cold. The
coolant level is satisfactory if it is be-
tween the FULLº and LOWº lines on
the reservoir. If the level is low, add
ethylene-glycol type coolant.
The coolant level in the reservoir will vary
with engine temperature. However, if the
level is on or below the LOWº line, add
coolant. Bring the level up to the FULLº 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 ra-
diator, 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.
To prevent burning yourself, do not
remove the radiator cap when the
engine is hot.
CAUTION! Coolant type selection
Your coolant must contain ethylene-gly-
col antifreeze. In addition to preventingfreezing and subsequent damage to the
engine, this will also prevent corrosion. Further supplemental inhibitors or addi-
tives are neither needed nor recom- mended.
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 rec- ommend 50% solution be used for your
Toyota, or a sufficient quantity to provideprotection to about -35 C (-31 F).
Do not use alcohol type antifreeze
or plain water alone.
NOTICE
Type A
Type B
Checking brake fluid
Checking the engine coolant level

162
CAUTION
Do not drive with the snow tires in- correctly inflated.
Never drive over 120 km/h (75
mph) with any type of snow tires.!
TIRE CHAIN SELECTION Use the tire chains of correct size.
Regulations regarding the use of tire
chains vary according to location or
type of r oad, so always check them be-
fore installing chains.
CHAIN INSTALLATION Install the chains on the front tires as
tightly as possible. Do not use tire
chains on the rear tires. Retighten
chains after driving 0.5 '1.0 km
(1/4 '1/2 mile).
When installing chains on your tires, care- fully follow the instructions of the chain
manufacturer.
If wheel covers are used, they will be
scratched by the chain band, so removethe covers before putting on the chains.
Do not exceed 50 km/h (30 mph) or
the chain manufacturer's recom-
mended speed limit, whichever is
lower.
Drive carefully avoiding bumps,
holes, and sharp turns, which may
cause the vehicle to bounce.
Avoid sharp turns or locked-
wheel braking, as use of chains
may adversely affect vehicle han- dling.
CAUTION! 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.
Correct
replacement wheels are available
at your Toyota dealer.
A wheel of a different size or type may ad-
versely affect handling, wheel and bear-
ing life, brake cooling, speedometer/
odometer calibration, stopping ability,
headlight aim, bumper height, vehicle
ground clearance, 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 there-
fore should not be used. Never use an in-
ner tube in a leaking wheel which is de-
signed for a tubeless tire.
Replacing wheels

180ENGINE LUBRICATION Oil capacity (drain and refill), L (qt., Imp. qt.):
Two-wheel drive models2RZ-FE engine
With filter 5.5 (5.8, 4.8)
Without filter 4.8 (5.0, 4.2)
5VZ-FE engine
With filter 5.4 (5.7, 4.8)
Without filter 5.1 (5.4, 4.5)
Four-wheel drive models
3RZ-FE engineWith filter 5.4 (5.7, 4.8)
Without filter 4.7 (5.0, 4.1)
5VZ-FE engine With filter 5.2 (5.5, 4.6)
Without filter 4.9 (5.2, 4.3)
Oil grade: API SH, Energy-Conserving IIº multi-
grade engine oil or ILSAC multigrade
engine oil is recommended. Recommended oil viscosity (SAE):
COOLING SYSTEM
Total capacity, L (qt., Imp. qt.):
Two-wheel drive models With manual transmission
2RZ-FE engine 8.0 (8.5, 7.0)
5VZ-FE engine
10.1 (10.7, 8.9)
With automatic transmission 2RZ-FE engine
7.8 (8.2, 6.9)
5VZ-FE engine 10.0 (10.5, 8.8) Four-wheel drive models
With manual transmission
3RZ-FE engine 8.3 (8.8, 7.3)
5VZ-FE engine
10.1 (10.7, 8.9)
With automatic transmission 3RZ-FE engine
8.2 (8.7, 7.2)
5VZ-FE engine 10.0 (10.5, 8.8)
Coolant type: With ethylene-glycol antifreeze (Do not use alcohol type.)
BATTERY Open voltage* at 20 C (68 F):
12.7 V Fully charged
12.3 V Half charged
11.9 V Discharged
*Voltage that is checked 20 minutes after
the key is removed with all the lights
turned off Charging rates:
5 A max.

184
Engine compartment (Canada)
7. DOME 15 A: Car audio system, power
antenna, interior light, clock, ignition
switch light, personal lights, door courtesy
lights
8. TAIL 10 A: Tail lights, license plate
lights
9. PANEL 10 A: Emergency flashers,
heater control system, air conditioning
cooling system, gauges and meters,
clock, car audio system overdrive indica-
tor light, glovebox light, cigarette lighter,
instrument panel lights
10. A.C 10 A: Air conditioning cooling
system
11. HEAD (RH) 10 A: Right-hand head-
lightInstrument panel
12. HEAD (LH) 10 A: Left-hand head-
light
13. HEAD (HI RH) 10 A: Right-hand
headlight (high beam), hi-beam indicator light
14. HEAD (HI LH) 10 A: Left-hand head-
light (high beam)
15. HEAD (LO RH) 10 A: Right-hand
headlight (low beam)
16. HEAD (LO LH) 10 A: Left-hand
headlight (low beam)
17. DRL 7.5 A: Daytime running light sys-
tem
18. 4WD 15 A: A.D.D. control system,
four-wheel drive control system, rear dif- ferential lock system 19. GAUGE 10 A:
Gauges and meters,
back-up lights, cruise control system,
power antenna, power door lock control
system, electronically controlled automatic
transmission system, starting system,
charging system, heater control system
20. TURN 10 A: Turn signal lights, emer-
gency flashers
21. ECU-IG 15 A: Cruise control system,
anti-lock brake system, shift lock system
22. WIPER 20 A: Windshield wipers and
washer
23. IGN 7.5 A: Discharge warning light,
SRS airbag system
24. RADIO 7.5 A: Car audio system,
power antenna
25. CIG 15 A: Cigarette lighter, clock,
power rear view mirrors, back-up lights,
shift lock system
26. ECU-B 15 A: SRS airbag warning
light, daytime running light system, cruise control system, anti-lock brake system