Exam 6: Front Suspension Systems

Technician A says when measuring vertical ball joint wear, pry upward with a steel bar under the front tire and observe the dial indicator reading. Technician B says when measuring lateral ball joint wear, grasp the tire at the top and bottom and try to force the tire inward and outward and observe the dial indicator reading. Who is correct?

If both front springs are sagged, front wheel caster will move toward what direction?

When the center of a front wheel viewed from the side is tilted rearward from the true vertical center of the wheel, this alignment angle referred to as:

A 300-pound load deflects a linear-rate coil spring 1 inch. A 600-pound load will deflect the same spring how much in total?

What does the strut rod prevent the lower control arm from doing?

While a vehicle is taken for a test drive, a loud clunking noise is heard from the right front of the vehicle only during hard brake maneuvers. What is the most likely cause?

What do variable rate springs provide that linear rate springs do not?

Technician A says in a torsion bar front suspension, the front end of the torsion bar is always attached to the upper control arm. Technician B says in a torsion bar front suspension, a torsion bar adjustment mechanism is mounted where the rear end of the torsion bar is attached to the chassis. Who is correct?

Explain the effects of a sagged front spring.

Excessive positive camber results in rapid wear on the inside edge of the tire tread.

Identify the  components  1 through 10 in the image below:

Technician A says front curb riding height is reduced by worn control arm bushings. Technician B says front curb riding height is reduced by weak coil springs. Who is correct?

Explain the design and purpose of a monoleaf spring.

Technician A says that some vehicles are equipped with aluminum stabilizer bars to reduce unsprung weight. Technician B says that some vehicles are equipped with hollow stabilizer bars to reduce unsprung weight. Who is correct?

Technician A says a ball joint stud could become broken if there is an out-of-round taper in the steering knuckle mounting hole. Technician B says a ball joint stud could become broken if the ball joint nut was incorrectly torqued. Who is correct?

Improper curb riding height affects other suspension alignment angles.

All of these statements about heavy-duty coil springs are true EXCEPT:

Worn or damaged jounce or rebound bumpers may be caused by reduced curb riding height.

In some front suspension systems, torsion bars perform the same functions as coil springs.

What can occur if the control arm bushing bolts are tightened while the vehicle is on a lift and not at vehicle ride height?