Mercury F6AZ-3085-BA Arm Assembly - Front Suspension

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After removing the upper control arm assembly, you should inspect the control arm bushings for cracks and tears. If they're damaged or worn, you should take the control arm to an automotive machine shop to have new bushings installed.

Raise the lower control arm to simulate normal ride height. Tighten the pivot bolt nuts. Install the wheel. Remove the jackstands. Lower the vehicle. Tighten the wheel lug nuts to the recommended torque.

Remove the cotter pin from the upper balljoint stud and loosen the stud nut slightly. Place a floor jack under the lower control arm and raise it slightly. Tap the steering knuckle near the upper balljoint stud with a hammer to loosen it. Use a balljoint stud separator if needed (note that this may damage the balljoint boot). Remove the nut from the upper balljoint stud and the upper control arm pivot shaft attaching bolts. Remove the upper control arm and pivot shaft as an assembly.

The lower control arm pivot bolts and nuts are installed but not fully tightened.

Remove the cotter pin from the balljoint stud. Loosen the castle nut on the stud. Use sharp raps on the steering knuckle near the stud to release pressure and loosen the stud. Remove the balljoint stud nut. Lower the control arm by removing its mounting bolts.

Position the upper control arm pivot shaft on the frame. Install the attaching bolts and washers. Insert the upper balljoint stud into the steering knuckle and secure it with the nut or pinch bolt.