Wheel Alignment: To find out if you need an alignment, first check each tire and look for uneven wear patterns.
The problem with this method, however, is that if you can see a wear pattern like the ones listed below, it may be too late
to save that tire. This is why it is a good idea to have your alignment checked periodically.
At each tire, take
a coin and insert it in the tread at the inside, center and outside.
If the tread is deeper on the edges than in the center, the tire is over inflated.
If the tread is deeper in the center than the edges, the tire is under inflated.
If the tread is deeper on one side than the other, have your wheel alignment checked soon.
Run your hand back and forth across the tread, being careful not to cut yourself on any debris or exposed steel belt
wire. If the tread is smooth in one direction, but jagged in the other you have what is called a "saw-tooth"
wear pattern which is caused by a toe-in problem. Have the alignment checked as soon as possible as this condition causes
rapid tire wear.
The first two conditions do not call for a wheel alignment but the second two do. If these wear
patterns are pronounced, you should replace the tires or move them to the rear before aligning the car. Ask your alignment
specialist to be sure.
Another indication of an out-of-alignment condition is a car that continuously drifts or pulls
to one side of the road when you let go of the wheel. A car that is hard to keep in a straight line without constant steering
corrections is also a candidate. These conditions may or may not also contribute to premature tire wear.
A wheel alignment
cannot be done on a car with loose or worn front end parts. The technician will first check for worn parts and inform you
of any problems before beginning the alignment.
The best type of wheel alignment is a four wheel alignment. Many cars
today have adjustable rear alignment settings, but even for cars without adjustments in the rear, a four wheel alignment will
allow the technician to identify any rear tracking problems and compensate for them with adjustments to the front.
After
the wheel alignment is finished, you should drive the car on a straight and level road and check that the car goes straight
and that the steering wheel is in the proper position with the spokes level. If you notice a problem, take the car back and
have the technician drive it and fine-tune the alignment settings.