Chevrolet Nova/ChevyII 1962-1979

Upper Control Arm

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REMOVAL & INSTALLATION



1962-67 Chevy II
  1. Remove the front shock absorber and the coil spring as described previously.
  2.  
  3. Place a jack under the lower control arm.
  4.  
  5. Remove the cotter pin and nut from the upper ball joint stud. Break the ball joint and stud loose. Lower the jack to drop the lower control arm and steering knuckle assembly.
  6.  
  7. Remove the upper control arm pivot shaft stud nuts from the fender skirt and remove the upper control arm. Inspect the upper control arm for cracks, bends, or other signs of fatigue. Replace if necessary.
  8.  

To install:

  1. Begin installation by inserting the upper control arm pivot shaft into the fender skirt openings. Fit the lockwasher and nuts and torque the nuts to 60-90 ft. lbs.
  2.  
  3. Raise the jack to position the lower control arm and steering knuckle assembly and insert the upper ball joint stud into the upper boss of the steering knuckle. Fit the stud nut and torque to 45 ft. lbs. Install a new cotter pin.
  4.  
  5. Install the coil spring and shock absorber as described previously.
  6.  
  7. Lubricate the new ball joint. Check and adjust the front-end alignment as required.
  8.  

1968-74 Chevy II and Nova


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Fig. Fig. 1 Upper control arm mounting-1968-74 vehicles

  1. Place a jack under the outer end of the lower control arm to support the weight of the car. Remove the wheel and tire.
  2.  
  3. Remove the cotter pin and nut from the upper ball joint stud. Disconnect the stud from the steering knuckle.
  4.  
  5. Remove the two nuts which secure the upper control arm shaft to the front crossmember. Note the number of shims at each bolt.
  6.  
  7. If necessary, withdraw the bolts which secure the control arm to the frame to obtain adequate clearance for control arm removal. Inspect the upper control arm for cracks, bends, or other signs of fatigue. Replace if necessary.
  8.  

To install:

  1. Begin installation by positioning the upper control arm in the car. Fit the locknuts and bolts which secure the upper control arm shaft to the frame. Be sure to install the same number of shims as were removed at each bolt. Torque the bolts to 50 ft. lbs.
  2.  
  3. Connect the steering knuckle to the ball joint stud. Fit the stud nut and torque to 50 ft. lbs. Install a new cotter pin.
  4.  
  5. Install the wheel and tire and lower the car. Bounce the front end of the car to centralize the bushings. Torque the bushing collar bolts to 50 ft. lbs. Check and adjust the front-end alignment as required.
  6.  

1975-79 Nova
  1. Raise the vehicle on a hoist.
  2.  
  3. Support the lower control arm with a jackstand.
  4.  
  5. Remove the tire and wheel.
  6.  
  7. Separate the upper control arm ball stud from the steering knuckle.
  8.  
  9. Remove the two nuts which secure the upper control arm shaft to the frame bracket.
  10.  

Tape the shims together and mark them for the position from which they were removed.

In some cases it is necessary to remove the upper control arm attaching bolts to allow clearance to remove the upper control arm. The attaching bolts are splined into the frame. To remove them, proceed as follows:

  1. Tap the bolt down gently with a brass drift;
  2.  
  3. Gently pry the bolt up with a box wrench;
  4.  
  5. Remove the nut and, using a suitable prybar and block of wood, pry the bolts from the frame.
  6.  

  1. Remove the upper control arm from the vehicle.
  2.  

To install:

  1. To install the upper control arm, loosen the end shaft retainer bolts and/or nuts.
  2.  
  3. If they were removed, position new upper control arm attaching bolts loosely in the frame and install the control arm crossshaft on the attaching bolts.
  4.  
  5. Using a free running nut instead of the regular locknut, tighten both nuts until the serrated bolts are reseated.
  6.  
  7. Remove the free running nuts and install the regular locknuts.
  8.  
  9. Install the same number of shims to each bolt which were removed and taped together. Torque the nuts to 75 ft. lbs.
  10.  

Tighten the nut on the thinner shim pack first for improved shaft-to-frame clamping force and torque retention.

  1. Install the ball joint stud through the steering knuckle, torque the nut to 60 ft. lbs, and install the cotter pin.
  2.  

Never back off the nut to align the cotter pin. Always tighten the nut to the next slot which lines up with the hole in the stud.

  1. Install the tire and wheel and lower the vehicle.
  2.  
  3. With the vehicle lowered, torque the shaft retainer bolts and/or nuts to 75 ft. lbs. Check and adjust the front end alignment as necessary.
  4.  

 
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