1997 TOYOTA TACOMA air intake

1021. Air Intake Selector
2. Air Flow Selector
3. Temperature Selector
4. Fan Speed Selector
5. A/Cº Button (on some models)
Air conditioning systemÐ ÐControls

104
Air Intake selector Move the lever to select the air source.
1. RecirculateÐRecirculates the air in-
side the vehicle.
2. FreshÐ Draws outside air into the sys-
tem. A/Cº button
To turn on the air conditioning, press the
A/Cº button. The A/Cº button indicator
will come on. To turn the air conditioning
off, press the button again.
If the A/Cº button indicator flashes, there
is a problem in the air conditioning system
and the air conditioning automatically
shuts off. If this happens, take your ve-
hicle to a Toyota dealer for service.

105

To cool off your Toyota after it has been
parked in the hot sun, drive with the
windows open for a few minutes. This
vents the hot air, allowing the air condi-
tioning to cool the interior more quickly.
Make sure the air intake g rilles in front
of the windshield are not blocked (by
leaves or snow, for example).
On humid days, do not blow cold air on
the windshield. The windshield could
fog up because of the difference in airtemperature on the inside and outside
of the windshield.
Keep the area under the front seats
clear to allow air to circulate through-out the vehicle.
On cold days, move the fan speed to
HIº for a minute to help clear the in-
take ducts of snow or moisture. This
can reduce the amount of fogging onthe windows.
ÐAir flow selector settings
-Operating tips

106Heating
For best results, set controls to:
Fan speed ÐAny setting except OFFº
Temperature Ð Towards WARM
(red zone)
Air intake ÐFRESH (outside air)
Air flowÐFLOOR 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
Vehicles withA/Cº button-
Moving the air flow selector lever to the windshield position turns on the defrost-
er-linked air conditioning. At this time, the
A/Cº button indicator comes on regard-less of whether or not the A/Cº button ispressed in. This is to clear up the front
view more quickly. When the A/Cº button is not pressed in,
turning the air flow selector lever to anoth-
er position 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.

107
Defrosting The outside of the windshield For best results, set controls to:
Fan speed ÐAny setting except OFFº
Temperature ÐTowards WARM
(red zone)
Air intake ÐFRESH (outside air)
Air flow ÐWINDSHIELD
Vehicles with A/Cº buttonÐ
Moving the air flow selector to the wind-
shield position turns on the defroster-
linked air conditioning. At this time, the
A/Cº button indicator comes on regard-less of whether or not the A/Cº button is pressed in. This is to clear up the front
view more quickly. When the A/Cº button is not pressed in,
moving the air flow selector lever to anoth-
er position turns off the air conditioning. To heat the vehicle interior while de-
frosting the windshield, choose floor/
windshield air flow.
If air flow control is not satisfactory, check
the side vents. The side vents may be
opened or closed as shown.
ÐSide vents

11 8FUNCTIONS 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 isleft 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 combustionprocess.
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 valve stems.
The amount of engine oil consumed de-
pends 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 become
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 itappear 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 bechecked every time you refuel the vehicle.
Failure to check the oil level
regularly could lead to serious
engine trouble due to insufficient oil.
NOTICE
For detailed information on the oil level
check, see Checking the engine oil levelº
in Chapter 7-2.
Facts about engine oil consumption

207
Fuel type:
Unleaded gasoline, Research Octane Number 91 (Octane Rating 87) orhigher
Fuel tank capacity, L (gal., Imp. gal.):
Two-wheel drive models
57 (15.1, 12.5) Four-wheel drive models
68 (18.0, 15.0) ENGINE
Valve clearance (engine cold), mm (in.) 2RZ-FE and 3RZ-FE engines
Intake 0.15 '0.25 (0.006 '0.010)
Exhaust 0.25 '0.35 (0.010 '0.014)
5VZ-FE engine
Intake 0.13 '0.23 (0.006 '0.009)
Exhaust 0.27 '0.37 (0.011 '0.014)
Spark plug type: 2RZ-FE and 3RZ-FE engines NIPPONDENSO K16R-U
NGK BKR5EYA
5VZ-FE engine
NIPPONDENSO K16TR11
NGK BKR5EKB11
Spark plug type: 2RZ-FE and 3RZ-FE engines
0.8 (0.031)
5VZ-FE engine
1.1 (0.043) Drive belt tension measured with Bor-
oughs drive belt tension gauge No.
BT-33-73F (used belt), Ibf: 2RZ-FE and 3RZ-FE engines
Generator belt 115 + 20
Air conditioning
compressor belt 100 + 20
Power steering pump belt 100 -15+20
5VZ-FE engine Generator belt 100 + 20
Air conditioning
compressor belt 100 + 20
Power steering pump belt 100 -15+20
Fuel
Service specifications