Pontiac FIREBIRD 1972 Service Manual page 1244

WHEELS AND TIRES 10-7
Fig. 10-8 Tire Inflation Pressures
applied to the wheel rim flanges 180" from the heavy spot. 4. Station Wagon loads should be distributed as far for-
If total weight requirement is three ounces, the weights are ward as possible.
split half inside and half outside the wheel to maintain a
satisfactory dynamic balance. Wheel and tire assemblies
5. Vehicles with luggage racks do not have a vehicle
requiring more than six ounces are replaced. load limit greater than specified.
OPTIONAL INFLATION
FOR REDUCED LOADS
(750 LBS. MAX.)
Front Rear
26 24
24 24
24 28
24 28
26 24
24 24
26 24
24 24
26 26
-
MODELS
CATALINA with
G78 x 15 Tires
BONNEVILLE & GRANDVILLE
2-Door & 4-D00r and
Catalina with H78 x 15 Tires
B SERIES Station Wagons
A SERl ES Station Wagons
F SERIES
G SERIES &
G.T.O.
All Other Models
X Series (Pressure Depends on
Vehicle Weight
-
Consult Placard
On Left Front Door)
6. When towing trailers, the allowed passenger and
RECOMMENDED TIRE INFLATION PRESSURES
cargo load must be reduced by an amount equal to
the trailer tongue load on the trailer hitch.
Load Limit: Sedans 1100 LBS., Station Wagons 1 2 0 0 ' L ~ S . . Cars with Bucket Seats 950 LBS.. All F Series 800 LBS.
STANDARD INFLATION
FOR A L L LOADS
INCLUDING FULL RATED
(POUNDS PER SQUARE INCH COOL)
Front Rear
26 30
24 28
24 32
24 32
26 26
24 28
26 28
24 28
26 26
NOTES ON CHART:
MINOR REPAIRS
1. Tire inflation pressures may increase as much as
6
pounds per square inch (psi) when hot.
2. For continuous high speed operation (over 7 5 mph)
increase tire inflation pressures 4 p.s.i. over the
recommended pressures up to a maximum of 32
pounds per square inch cold for B rated tires, or 40
pounds per square inch for D rated tires. Sustained
speeds above 7 5 mph are not recommended when the
4 pounds per square inch adjustment would require
pressures greater than maximum stated above.
TEST FOR LEAKS
1. Use soapy water to check valve for leaks. In many
cases air loss can be corrected by simply tightening
the valve core.
2. If the reason for air loss is not obvious, submerge the
complete wheel assembly in a tank of water.
3. Mark the tire and rim at the point where air is escap-
ing.
3. Cold tire inflation pressure: after vehicle has been
TIRE MOUNTING AND DISMOUNTING
inoperative for 3 hours or more, or driven less than INSTRUCTIONS:
1 mile. Hot tire inflation pressure: after vehicle has
been driven 10 miles or more at 60-70 miles per hour. Because of a tight wheel to tire design, it is necessary to