1. Compatibility Check:
- First, ensure that the AC system you choose is compatible with the engine and electrical system of your 79 VW bus. You might need to consult with an automotive expert or AC technician to confirm compatibility.
2. Gather Parts and Supplies:
- You will need the AC system components, including the compressor, condenser, evaporator, receiver-drier, expansion valve, hoses, and refrigerant. Additionally, you may need custom brackets and parts to mount the AC components in your bus.
3. Prepare the Bus:
- Create space in the engine bay and passenger area for the AC components. This might involve modifying or relocating existing components like the battery, fuel tank, or parts of the dashboard.
4. Install the Compressor:
- Mount the AC compressor to the engine. This might require custom brackets or modifications to the engine mounts. Ensure the compressor is securely attached and aligned correctly with the engine belt or pulley.
5. Install the Condenser:
- Mount the condenser in the front of the bus, typically behind the grille or in front of the radiator. Use custom brackets and ensure the condenser has adequate airflow.
6. Install the Evaporator:
- Mount the evaporator inside the passenger cabin, usually under the dashboard. Custom modifications to the dashboard or console might be necessary. Ensure the evaporator has good airflow to effectively cool the cabin.
7. Connect Components:
- Connect the AC components using refrigerant hoses and fittings. Follow the manufacturer's guidelines for proper connection and routing of hoses.
8. Add Refrigerant:
- Use a professional AC technician to evacuate the air from the system and charge it with the appropriate amount of refrigerant specified for the system.
9. Electrical Integration:
- Wire the AC system to the vehicle's electrical system. This might involve adding relays, fuses, and switches for controlling the AC.
10. Test and Adjust:
- Once everything is connected, test the AC system for leaks, proper airflow, and cooling performance. Adjust the controls to ensure efficient and effective cooling.
11. Custom Dash Modifications:
- Since the 1979 VW bus didn't come with AC from the factory, you might need to make custom modifications to the dashboard to accommodate the AC controls and vents.
Remember, installing AC in an older vehicle can be complex and requires specialized knowledge and skills. It's recommended to consult with a qualified automotive technician or an expert in vintage vehicle modifications to ensure the AC installation is done correctly and safely.
