It's an art as much as a science, and to do it right you need the right equipment.
First, you need to be able to determine the rotational plane of the wheels, then you need to make certain that the toe-in, caster and camber are all adjusted properly.
There aren't many jobs that I won't do on my own vehicle, but alignment is one of them. If you want it done right, take it to a professional.
if you have independent suspention front and rear chances are a 4 wheel alignment can be done typically front wheel drive vehicles but not all.
Four wheel is preferred.
Front Wheel alignment
No, its Front wheel drive
My van has bad tires at front and better ones at rear, should wheel alignment be performed with bad tires?
Depends on vehicle and type of front end.
When you have the front end aligned the mechanic should align the steering wheel also. This is so the steering wheel is positioned straight when you're driving straight down the road.
That requires a front end alignment machine to do that.
NO That depends on how the struts attach to the knuckle or control arm. On some front wheel drives an alignment is required.
Some cars you can and some require 4 wheel alignment.
Assuming that one is referring to a front wheel alignment, there are a number of signs that can indicate that this process is required. If the car has driven over 100,000 miles since the last alignment, the front tires are wearing unevenly, the front of the car shakes when driving on a smooth surface, or the car is pulling to one side, a front wheel alignment is probably needed.
Take it to a garage for a wheel alignment. They have the spec's.