Here's a general overview. Specific steps may vary slightly depending on your exact Astro model (e.g., AWD vs. 2WD). Always consult a repair manual specific to your year and model for detailed instructions and torque specifications.
Tools You'll Need:
* Jack and jack stands: Essential for safely lifting the vehicle.
* Wheel chocks: To prevent the van from rolling.
* Lug wrench: To remove the wheels.
* Wrench(es): Likely a socket set with metric sizes (check your repair manual for the exact sizes needed for the shock mounting bolts and nuts).
* Shock compressor (highly recommended): This tool makes compressing the shock spring much safer and easier. Attempting this without one is risky.
* Penetrating oil (like PB Blaster): To help loosen rusted bolts.
* Torque wrench: For tightening bolts to the correct specification (crucial for safety).
* Gloves: To protect your hands.
* Safety glasses: To protect your eyes.
* New front shocks: Make sure you purchase the correct shocks for your Astro's year, model, and options (2WD/AWD).
Steps (General Outline):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks on the rear wheels. Wear safety glasses and gloves.
2. Lift and Secure: Use the jack to lift the front of the van. Securely place jack stands under the frame near the suspension. Never work under a vehicle supported only by a jack.
3. Remove the Wheel: Remove the lug nuts and take off the wheel.
4. Disconnect the Shock:
* Top Mount: Locate the top shock mount (usually a bolt or nut). Apply penetrating oil if needed and carefully loosen and remove the nut or bolt. You may need to remove some other components to access it depending on your model.
* Bottom Mount: Locate the bottom shock mount (often a bolt). Again, use penetrating oil if necessary and carefully remove the bolt.
5. Compress the Spring (using a shock compressor): This is the most dangerous part if not done properly. Use the shock compressor to compress the spring enough to remove the shock. Follow the instructions for your specific shock compressor carefully.
6. Remove the Old Shock: Once the spring is compressed, carefully remove the old shock absorber.
7. Install the New Shock: With the spring still compressed, install the new shock absorber in reverse order of removal.
8. Release the Spring: Carefully release the spring using the compressor.
9. Reconnect and Tighten: Reinstall the top and bottom shock mounts, tightening the bolts to the manufacturer's specified torque. Refer to your repair manual for the correct torque values.
10. Reinstall the Wheel: Replace the wheel and tighten the lug nuts securely.
11. Lower the Vehicle: Carefully lower the vehicle using the jack.
12. Double Check: After lowering the van, visually inspect all connections to ensure everything is secure.
13. Test Drive: Test drive the van to check for any unusual noises or handling problems.
Important Considerations:
* Repair Manual: A repair manual specific to your 1993 Chevrolet Astro van is highly recommended. It will provide detailed diagrams, torque specifications, and step-by-step instructions tailored to your vehicle.
* Parts: Ensure you purchase the correct replacement shocks for your Astro. Your local auto parts store can help you identify the right ones based on your VIN.
* Safety: This job involves working under a vehicle and dealing with compressed springs. Prioritize safety at all times. If you're unsure about any step, consult a professional mechanic.
This is a simplified guide. Always consult a repair manual for your specific vehicle before attempting this repair. Incorrect installation can lead to dangerous results.
