Here's a general procedure. This is not a substitute for a repair manual specific to your 1990 Corsica. Consult a Haynes or Chilton manual for detailed instructions, torque specifications, and diagrams specific to your vehicle. Variations exist depending on trim level and options.
Tools You'll Need:
* Jack and jack stands (crucial for safety)
* Wrench(es) to fit the shock mounting bolts (likely 13mm and possibly 15mm or larger)
* Socket set and ratchet
* Possibly a breaker bar for stubborn bolts
* Penetrating oil (like PB Blaster)
* Torque wrench (highly recommended)
* Safety glasses
* Gloves
* Wheel chocks
Procedure:
1. Safety First: Park on a level surface, engage the parking brake, and chock the front wheels. Use jack stands to securely lift the rear of the car after jacking it up. Never work under a car supported only by a jack.
2. Remove the Wheel: Remove the wheel from the side you're working on.
3. Locate the Shock Absorber: Identify the upper and lower shock mounting points. They are typically bolted to the vehicle's chassis and axle.
4. Prepare for Removal: Spray penetrating oil on the mounting bolts at both the top and bottom of the shock. Let it soak for at least 15-20 minutes to loosen any corrosion.
5. Disconnect the Shock: Unscrew the nuts and bolts holding the shock absorber in place at both the top and bottom mounts. This may require significant effort depending on the condition of the bolts and the age of the vehicle. A breaker bar might be necessary.
6. Remove the Shock Absorber: Carefully lower the shock absorber out of its mounting position. Be mindful of any potential springs or other components.
7. Install the New Shock Absorber: Position the new shock absorber into the mounting points. Ensure it's seated correctly.
8. Secure the Shock Absorber: Install and tighten the nuts and bolts at both the top and bottom mounts. Use the torque wrench to tighten them to the manufacturer's specified torque (check your repair manual).
9. Repeat Steps 5-8 on the Other Side: Repeat the process for the other rear shock absorber.
10. Lower the Vehicle: Carefully lower the vehicle using the jack.
11. Replace the Wheel: Put the wheel back on and tighten the lug nuts.
12. Double Check: After lowering the vehicle completely, check all bolts to ensure they are properly tightened. Give the car a gentle bounce to test the new shocks.
13. Test Drive: Take a short test drive to ensure the shocks are functioning correctly and there are no unusual noises.
Important Considerations:
* Spring Compression: Some rear shocks may require a spring compressor for safe installation and removal. If your shocks require a spring compressor, rent or borrow one before starting the job. Incorrect use of a spring compressor can lead to serious injury.
* Repair Manual: A repair manual specific to your 1990 Chevrolet Corsica is highly recommended. It will provide detailed diagrams, torque specifications, and procedural information specific to your vehicle.
* Parts: Make sure you purchase the correct replacement shocks for your 1990 Corsica. Auto parts stores can help you identify the right ones based on your VIN or year/make/model.
This procedure is a guideline. Always prioritize safety and refer to your vehicle's repair manual for precise instructions and torque specifications. If you are not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic.
