Safety First:
* Refrigerant Handling: AC systems contain refrigerant under high pressure. Do not attempt this repair without proper refrigerant recovery and handling equipment. Improper handling can result in serious injury and environmental damage. A qualified technician should handle refrigerant evacuation and charging.
* Eye Protection: Wear safety glasses or goggles throughout the repair.
* Gloves: Wear work gloves to protect your hands.
Tools You'll Need:
* Socket set (metric)
* Wrenches (metric)
* Torque wrench (crucial for proper tightening)
* AC compressor clutch pulley puller
* AC compressor clutch alignment tool (highly recommended)
* Refrigerant recovery and charging equipment (essential)
* Wire cutters/crimpers
* Rags or shop towels
* Safety glasses/goggles
* Work gloves
Procedure (General Steps):
1. Evacuate the Refrigerant: This is the most crucial step. A qualified technician must use equipment to safely recover the refrigerant from the system before disconnecting any lines. Never simply release the refrigerant into the atmosphere.
2. Disconnect the Battery: Disconnect the negative terminal of the battery to prevent electrical shocks.
3. Access the Compressor: Locate the AC compressor (usually on the engine's front). You might need to remove some components for better access (e.g., belts, shrouds, etc.). Consult your repair manual for specific removal instructions.
4. Disconnect Electrical Connections: Disconnect the electrical connector from the AC compressor clutch. Take pictures or make notes to remember how everything is connected.
5. Remove the Drive Belt: Remove the serpentine belt to access the compressor clutch. Consult your repair manual for proper belt routing.
6. Remove the Clutch Pulley: Use the pulley puller to carefully remove the AC compressor clutch pulley. This requires careful work and the right tools. Damage to the compressor shaft is possible if not done correctly.
7. Remove the Old Clutch: Carefully remove the old AC compressor clutch. This might involve removing bolts or other fasteners.
8. Install the New Clutch: Carefully install the new AC compressor clutch, ensuring it's properly aligned. An alignment tool is highly recommended here to prevent damaging the compressor shaft.
9. Install the Pulley: Carefully install the AC compressor clutch pulley, ensuring it's seated correctly and tightened to the manufacturer's specifications using a torque wrench.
10. Reconnect Electrical Connections: Reconnect the electrical connector to the AC compressor clutch.
11. Reinstall the Drive Belt: Reinstall the serpentine belt, ensuring it's routed correctly.
12. Reconnect the Battery: Reconnect the negative battery terminal.
13. Evacuate and Recharge the System: A qualified technician must evacuate the system of any remaining air and moisture, then recharge it with the correct amount and type of refrigerant. This is essential for the AC system to work properly and safely.
Important Considerations:
* Repair Manual: A factory service manual for your specific 1995 Chevy Blazer is indispensable. It provides detailed diagrams, torque specifications, and step-by-step instructions.
* Professional Help: If you are not comfortable with automotive repair, especially working with AC systems and refrigerant, it's best to take your vehicle to a qualified mechanic. Improper repair can lead to further damage and safety hazards.
This is a general overview. Always consult your vehicle's repair manual for detailed instructions and safety precautions specific to your 1995 Chevy Blazer. Remember, improper refrigerant handling is dangerous. Prioritize safety and seek professional help if needed.
