Chapter 17 Wheel Alignment Procedures 379 Copyright by Goodheart-Willcox Co., Inc. lower the tower enough to prevent damage to the mounting studs. Th e strut tower on one popular car is spot welded to the body. Nuts and studs also hold the upper strut tower in place. See Figure 17-42. To adjust caster and camber, drill out or chisel off the welds. Th en, loosen the nuts and pry on the tower to move it to the desired position. Tighten the nuts and recheck alignment. It is not necessary to re-weld the upper strut tower, as the welds are used for vehicle assem- bly only. However, the strut tower weld fl anges should be hammered into their original positions to keep them from contacting the underside of the hood. A few vehicles are designed so that the strut tower can be rotated to change caster and camber in one operation. Start the adjustment procedure by deciding how the tower Lower control arm Bottom View Spacer Strut rod Upper strut mount Strut tool Camber Adjust Dust cap Strut tool Fender bolt Fender Nuts Body mount Upper strut mount Caster Adjust Upper strut mount Strut tool Goodheart-Willcox Publisher Figure 17-39. Adjusting caster with a strut rod spacer. If spacers do not produce the proper caster, the strut rod must be replaced with one of the correct length. General Motors Figure 17-40. Adjusting camber and caster by moving the strut tower with a special tool. Strut bolts Template A B Perfect Equipment Corp. Figure 17-41. A—Caster/camber template used to mark the body for drilling proper alignment holes. B—Template in position for marking and drilling.