The 1966 Chevrolet Impala was Chevy's flagship model. The Impala was a full-size automobile equipped with an adjustable front suspension, which requires alignment to operate properly. Alignment refers to the position of the front wheels in relation to the body of the car. Alignment consists of four specifications: caster, camber, toe-in and toe-out. The car's alignment should be checked periodically to avoid premature tire wear as part of regular maintenance. However, the alignment should also be checked if the vehicle has been driven over a rough surface.
Caster angles must be within a range of + 1/4 and + 1 1/4 degrees. An optimal caster angle is + 3/4 degrees.
Camber angles must be within a range of -- 1/4 to + 3/4 degrees. An optimal camber angle is + 1/4 degrees.
Toe-in must be within a range of 1/8 and 1/4 inches.
Toe-out at the inner wheel must be 20 degrees and 20 1/2 degrees at the outer wheel. Note that an incorrect camber indicates bent steering arms if the remaining alignment specifications are followed.
