Pontiac tempest 1968 Service Manual page 608

10-1
WHEELS AND TIRES
C O N T E N T S O F THIS SECTION
Subject Page Subject Page
Minor Repairs . . . 10-1 Torque Specifications 10-5
Specifications . . . . . . . . . . . . . . . . . . 10-5 T i r e Usage Chart . . . . . . . . . . . . . . . . 10-5
RECOMMENDED TIRE INFLATION PRESSURES
Pounds Per Square Inch (Cold)
Models T i r e Ply
Standard Inflation
For A l l Loads
Including F u l l Rated
Optional Inflation
For Reduced Loads
A l l except
Station Wagons
1 to 6 Passengers +
200 lbs. luggage
(1100 lbs. Load)
1 to 5 Passengers
(750 lbs. Load)
A l l except
Station Wagons
4 Ply Rating
8 Ply Rating
Front Rear
24 lbs. 28 lbs.
26 lbs. 36 lbs*
Front Rear
24 lbs. 24 lbs.
24 lbs. 24 lbs.
Station Wagons
1 to 6 Passengers +
300 lbs, luggage
(1200 lbs. Load)
1 to 5 Passengers
(750 lbs. Load)
Station Wagons
4 Ply Rating
8 Ply Rating
Front Rear
24 lbs. 32 lbs
0
26 lbs. 36 lbs.
Front Rear
24 lbs, 28 lbs.
26 lbs. 30 lbs.
1. Tire inflation pressures may increase as much as 6 pounds per square inch (psi) when hot,
2„ For continuous high speed operation (over 75 mph) increase tire inflation pressures 4 pounds per square
inch over the recommended pressures up to a maximum of 32 pounds per square inch cold for 4 ply
rating tires, or 40 pounds per square inch for 8 ply rating tires. Sustained speed above 75 mph are
not recommended when the 4 pounds per square inch adjustment would require pressures greater than
maximum stated above.
3. Cold tire inflation pressure: after vehicle has been inoperative for 3 hours or more, or driven less than
1 mile. Hot tire inflation pressure: after vehicle has been driven 10 miles or more at 60-70 miles
per hour,
4. Station Wagon loads should be distributed as far forward as possible.
5. Vehicles with luggage racks do not have a vehicle load limit greater than specified.
6. When towing trailers, the allowed passenger and cargo load must be reduced by an amount equal to the
trailer tongue load on the trailer hitch.
MINOR REPAIRS
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 immediately
discernible, submerge the complete wheel assembly
in a tank of water.
3. Mark the tire and rim at the point where air
is escaping.
Tire Mounting and Dismounting Instructions:
The wheel assembly has a flat hump bead seat on
the outboard (valve hole) side of the rim. This design
provides a tight tire fit, making it necessary to use a
rubber lubricant or a vegetable oil soap solution for
tire mounting and dismounting. This design also