Cars & Vehicles Auto Parts & Maintenance & Repairs

How to Replace the Shocks and Struts in a Pontiac Bonneville

    Replace the Front Struts in a Bonneville

    • 1). Lift the front end of the Bonneville with a floor jack and support it by the frame with jack stands. Loosen and remove the nuts mounting the front wheels and set the wheels aside. Locate the struts under the front end of the car. They look like springs with hardware running through the middle as well as on both ends. Use a permanent marker to mark the orientation of the struts on the steering knuckle as well as the current position.

    • 2). Pop the hood and remove the three nuts holding the strut to the frame on the top side of the wheel well. Under the car, disconnect the brackets holding any sensors and hoses to the strut, including the wheel speed sensor, the anti-lock brake sensor and the brake hose. Disconnect the lower mounting bolt from the steering knuckle, and pull out the strut. Repeat this step on the other side of the Bonneville.

    • 3). Align the new strut with the marks you made on the steering knuckle, and install the upper mounting bolts. Set the dial on your torque wrench to 30 foot lb and tighten each nut until the wrench slips. Install the strut-to-knuckle bolts and torque them to 135 foot lb. Attach any brackets that you removed from the old strut to the new strut and repeat this step on the other side of the Bonneville.

    • 4). Mount the front wheels, and lower the front end of the car. Have a professional check the wheel alignment.

    Replace the Rear Struts in a Bonneville

    • 1). Raise the rear of the Bonneville and support the car by the frame. Remove the rear tires. Pull out the seat cushions and seat backs to have access to the upper side of the struts. Slide jack stands under the lower control arms, which support and partially control the wheel hub.

    • 2). Unbolt the strut from the rear knuckle on the bottom side and remove the upper strut nuts. Gently remove the old strut from the suspension. Repeat this step on the other side of the car.

    • 3). Position the new strut in the suspension and bolt the upper side to the frame through the rear seat access. Torque the upper side to 35 foot lb, and bolt the lower side to the knuckle. Torque it to 140 foot lb. Repeat this step on the other side of the Bonneville.

    • 4). Replace the seat back and cushion in the car and bolt them down. Mount the rear wheels, and lower the rear end of the car. Have a professional check the wheel alignment.

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