4. ASE Test A4, Section D - Wheel and Tire Diagnosis and Service Questions And Answers With 100% Correct Answers

What are the many causes of steering pull due to front tire abnormalities? - Front tires with different types, sizes, inflation pressure, tread designs, or a front tire with a conicity defect. What is tire conicity? - When a tire bead is not centered on the tire body. The bead forms a cone. Whats a good procedure to identify a tire that was built incorrectly with the tread slightly off center? - Swapping the rites front to rear is a good way of identifying a tire that was built incorrectly. What should you do if you find a tire with tread slightly off center? - The tire should be replaced, but sometimes will function in the rear. Why do tires wear excessively? - Because the tire tread is not contacting the road surface properly. What will cause feathered tire wear? - Improper toe adjustment. What causes wear on the inner or outer side of the tire tread face? - Improper camber adjustment. What causes cupped tread wear? - Improper wheel balance. What type of wear does under inflation cause? - Tire wear on both shoulders. How do you correct excessive tire wear? - Alignment adjustments correct most of that problem.How should a vehicle be aligned when it is used to carry weight? - The vehicle should be similarly loaded while the alignment is made. What kind of tire wear does over inflation cause? - Wear at the center of the tire. When should tire pressure be adjusted? - After the car has been sitting for a couple hours, and the tires are at ambient temperature. Why do station wagons, trucks, and utility vehicles require more pressure in the rear tires? - Because the loads they carry and to minimize sway. How long should tires be allowed to cool before inflation? - 2 to 3 hours. What three things can cause front wheel shimmy? - Improper dynamic wheel balance, excessive positive caster, or loose steering linkage components. Should you inspect the side wall on tires to make sure they are directional tires? - Yes. Why are tire changers used in the industry? - Allows the tire to be removed without damaging the tire's beads or the edges of the wheel. What causes dynamic wheel imbalance? - Cupped tire treads, wheel shimmy, or excessive steering linkage wear may be caused by dynamic wheel imbalance. What causes a tire to bounce up and down? - A wheel and tire assembly that is statically unbalanced. What causes a tire to shake/shimmy? - A wheel and tire assembly that is dynamically unbalanced. What two things can cause rear chassis waddle? - A shifted steel belt in a tire. Or a bent rear hub flange.How can tire and wheel runout be checked? - By using a runout gauge that follows the tire tread, or the gauge can be placed on the sidewall of the tire. What will an out of round tire cause? - Wheel hop while the vehicle is being driven.