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When to Check
Check your tires once a month
or more. Do not forget to check
the compact spare tire, it should
be at 60 psi (420 kPa). For
additional information regarding
the compact spare tire, see
Compact Spare Tire on
page 5-71.
How to Check
Use a good quality pocket-type
gage to check tire pressure.
You cannot tell if your tires
are properly inflated simply by
looking at them. Radial tires may
look properly inflated even when
they are under-inflated. Check
the tire’s inflation pressure when
the tires are cold. Cold means
your vehicle has been sitting for
at least three hours or driven no
more than 1 mile (1.6 km).
Remove the valve cap from the
tire valve stem. Press the tire
gage firmly onto the valve to
get a pressure measurement.
If the cold tire inflation pressure
matches the recommended
pressure on the Tire and Loading
Information label, no further
adjustment is necessary. If the
inflation pressure is low, add air
until you reach the recommended
amount.
If you overfill the tire, release air
by pushing on the metal stem
in the center of the tire valve.
Re-check the tire pressure with
the tire gage.
Be sure to put the valve caps
back on the valve stems.
They help prevent leaks by
keeping out dirt and moisture.
High-Speed Operation
{ CAUTION
Driving at high speeds, 100 mph
(160 km/h) or higher, puts an
additional strain on tires. Sustained
high-speed driving causes
excessive heat build up and can
cause sudden tire failure. You
could have a crash and you or
others could be killed. Some
high-speed rated tires require
inflation pressure adjustment for
high speed operation. When speed
limits and road conditions are such
that a vehicle can be driven at high
speeds, make sure the tires are
rated for high speed operation, in
excellent condition, and set to the
correct cold tire inflation pressure
for the vehicle load.
5-50 Service and Appearance Care