378 Auto Suspension and Steering Copyright by Goodheart-Willcox Co., Inc. in position as you tighten the nuts. It may be necessary to fi le the slotted holes to allow more movement. Th ere are several ways to adjust the caster on MacPherson strut vehicles. Some caster adjustments are made by moving the strut rod in or out. See Figure 17-38. Loosen the lock- nuts and turn them in the same direction until the proper adjustment is made. Tighten the nuts and recheck caster. On certain vehicles, the strut rod is used for caster adjustment, but the rod length must be changed by installing or remov- ing spacers at the point where the rod contacts the lower control arm, Figure 17-39. On some vehicles, the rod must be replaced with one of a diff erent length. On some vehicles, the caster and camber are adjusted by moving the strut tower. See Figure 17-40. Loosen the nuts holding the top of the strut tower. Th en slide the tower forward or backward to adjust caster, and in or out to adjust camber. Th e strut tower mounting holes on the body may have to be cut or fi led to create a slot. Figure 17-41 shows a template for cutting slots in the body sheet metal. If the slots must be created in the body, remove the tower nuts and Eccentric adjusting bolt Lower control arm assembly Eccentric adjusting cam Self-locking nut Honda Figure 17-34. An exploded view of a suspension that has the eccentric adjusting cam on the lower control arm. Nut Strut mounting bolts Strut body mount Strut assembly Goodheart-Willcox Publisher Figure 17-35. Loosen the strut-tower nuts and move the strut tower in or out to obtain the correct camber setting. MacPherson strut Nut Adjustment slot Body mount Goodheart-Willcox Publisher Figure 17-36. This MacPherson strut pivots in a slotted hole to allow front camber to be set. Loosen the nuts just enough to allow for adjustment. Torque the nuts to specifications after alignment. MacPherson strut Steering knuckle Slot for camber adjustment Hunter Figure 17-37. A MacPherson strut attached to the steering knuckle. Note the lower slot for camber adjustment. Adjusting nut Strut rod Lexus Figure 17-38. Adjusting front wheel caster by moving the strut rod (bar) in or out with the aid of adjustment nuts.