Checking And Replacing Tires - Toyota Celica 1997 Owner's Manual

Low tire pressure results in excessive
wear, poor handling, reduced fuel econo-
my, and the possibility of blowouts from
overheated tires. Also, low tire pressure
can cause poor sealing of the tread bead.
If the tire pressure is excessively low,
there is the possibility of wheel deforma-
tion and/or tire separation.
High tire pressure produces a harsh ride,
handling problems, excessive wear at the
center of the tire tread, and a greater pos-
sibility of tire damage from road hazards.
If a tire frequently needs refilling, have it
checked by your Toyota dealer.
The following instructions for check-
ing tire pressure should be observed:
D The pressure should be checked
only when the tires are cold. If your
vehicle has been parked for at least 3
hours and has not been driven for
more than 1.5 km or 1 mile since, you
will get an accurate cold tire pressure
reading.
D Always use a tire pressure gauge.
The appearance of a tire can be mis-
leading. Besides, tire pressure that
are even just a few pounds off can de-
grade handling and ride.
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D Take special care when adding air
to the compact spare tire.
smaller tire size can gain pressure
very quickly. Add compressed air in
small quantities and check the pres-
sure often until it reaches the specified
pressure.
D Do not bleed or reduce tire pres-
sure after driving. It is normal for the
tire pressure to be higher after driving.
D Never exceed the vehicle capacity
weight. The passenger and luggage
weight should be located so that the
vehicle is balanced.
D Be sure to reinstall the tire inflation
valve caps. Without the valve caps,
dirt or moisture could get into the valve
core and cause air leakage. If the caps
have been lost, have new ones put on
as soon as possible.
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Checking and replacing tires

The
CHECKING YOUR TIRES
Check the tire tread for the tread wear
indicators. If the indicators show, re-
place the tires.
The tires on your Toyota have built-in
tread wear indicators to help you know
when the tires need replacement. When
the tread depth wears to 1.6 mm (0.06 in.)
or less, the indicators will appear. If you
can see the indicators in two or more adja-
cent grooves, the tire should be replaced.
The lower the tread, the higher the risk of
skidding.
The effectiveness of snow tires is lost
if the tread wears down below 4 mm
(0.16 in.).