However, if you're determined to attempt it yourself, understand the significant risks involved. Here's a *general* overview of the process, but this is NOT a substitute for a professional's expertise:
1. Safety First:
* Wear safety glasses and gloves. Refrigerant is dangerous and can cause burns.
* Recover the refrigerant. You MUST evacuate the existing refrigerant from the system using a refrigerant recovery machine. This is legally required and essential for environmental protection. Discharging refrigerant into the atmosphere is illegal and harmful.
* Disconnect the battery. This prevents accidental shorts.
2. Component Removal:
* Access the compressor. This usually involves removing the serpentine belt, pulleys, and potentially other components to access the compressor mounting bolts.
* Disconnect the lines. Carefully disconnect the high-pressure and low-pressure refrigerant lines from the compressor. These lines are under pressure even after refrigerant recovery; use proper tools and procedures to avoid leaks and injury.
* Disconnect the electrical connector. Unplug the compressor's electrical connector.
* Remove the mounting bolts. Carefully remove the bolts securing the compressor to the engine block.
* Remove the compressor. Carefully remove the old compressor.
3. Compressor Installation:
* Install the new compressor. Make sure the new compressor is the correct replacement part for your 1990 Delta 88. Mount it securely using the correct bolts and torque specifications.
* Connect the lines. Carefully connect the high-pressure and low-pressure refrigerant lines to the new compressor. Ensure proper seals to prevent leaks.
* Connect the electrical connector. Plug in the electrical connector.
* Reinstall components. Reinstall any components that were removed to access the compressor (e.g., pulleys, serpentine belt).
4. System Vacuum and Recharge:
* Evacuate the system. Use a vacuum pump to evacuate the entire A/C system to remove any remaining air and moisture. This is crucial for proper system operation and prevents damage.
* Recharge the system. Use the proper amount and type of refrigerant specified for your vehicle. This requires specialized equipment and knowledge.
5. Testing:
* Test the system. After recharging, test the A/C system to ensure it's functioning correctly.
Important Considerations:
* You will need a shop manual specific to your 1990 Oldsmobile Delta 88. This manual provides detailed instructions, diagrams, torque specifications, and other critical information.
* You will need specialized tools: These include a refrigerant recovery machine, vacuum pump, manifold gauge set, and possibly other specialized tools for accessing and disconnecting components.
* Refrigerant handling is dangerous and requires training. Improper handling can lead to injury or environmental damage.
Again, this is a highly complex task. The risks associated with improper installation outweigh the potential cost savings of DIY. It's strongly recommended that you take your vehicle to a qualified automotive A/C technician for this repair.
