JUST SAY NO to R134a in your DeLorean's A/C...RED TEK recharge for the original R-12 system how-to

Introduction

This tutorial will guide you through the process of safely recharging a DeLorean's original R-12 air conditioning system with RED TEK 12a refrigerant. Note that the original components of the DeLorean's A/C system are not rated for R134a refrigerant. Proper preparation and adherence to environmental regulations are crucial for a successful recharge.

Step 1: Gather Necessary Tools and Materials

Before starting, ensure you have the following items:

• Two cans of RED TEK 12a (Part Number #301)
• Manifold gauges
• A vacuum pump
• Ester oil (recommended)
• A 134a valve adapter for the low side
• Personal protective equipment (gloves and eye protection)

Step 2: Purge the Existing Refrigerant

1. Purge the System: Ensure the A/C system is completely purged of any remaining refrigerant. Follow local environmental regulations for refrigerant disposal.
2. Verify No Mixing: Do not mix refrigerants as it is illegal and can damage the system.

Step 3: Evacuate the A/C System

1. Connect the Manifold Gauges:
   • Attach the low side adapter to the original R-12 fitting.
   • Connect the manifold gauges to the low and high side ports.
2. Start the Vacuum Pump:
   • Turn on the vacuum pump and open the low side valve on the manifold.
   • Allow the system to run under vacuum for a minimum of 20 minutes.
3. Hold the Vacuum:
   • After 20 minutes, close the manifold gauges and turn off the pump.
   • Hold the vacuum for an additional 45 minutes to check for leaks. Ensure the vacuum is maintained during this time.

Step 4: Check for Leaks

• Confirm that the vacuum holds for at least 45 minutes. If it fails, there may be leaks in the system that need to be addressed before proceeding.

Step 5: Prepare for Charging

1. Connect the Can Tapper:
   • Thread the can tapper onto the RED TEK can. Ensure the tapper is fully in the open position.
2. Attach the Can to the Manifold Gauges:
   • Disconnect the yellow hose from the vacuum pump and attach it to the RED TEK can.

Step 6: Charge the System with RED TEK

1. Introduce Refrigerant:
   • Open the low side valve on the manifold gauges.
   • Allow the refrigerant to flow into the system without the A/C running to establish a minimum charge.
2. Run the A/C:
   • Once the minimum charge is achieved, turn on the A/C.
   • Open the low side valve to allow the remaining refrigerant to enter the system.
3. Monitor Pressure:
   • You may need to add a second can of RED TEK if necessary. Aim for a total of 2 to 2.5 cans for optimal performance.

Step 7: Final Checks and Cleanup

1. Disconnect Hoses: Once charging is complete, disconnect the hoses from the A/C system.
2. Replace Caps: Ensure that all service ports are capped properly to prevent leaks.
3. Test the A/C: Start the vehicle and check that the A/C is blowing cold air. Monitor pressure to ensure it remains stable.

Conclusion

You have successfully recharged your DeLorean's A/C system with RED TEK 12a refrigerant. Remember that RED TEK operates more efficiently than R134a in the original system and requires less refrigerant. If you encounter any issues or have doubts about the process, consider consulting a professional for assistance. Enjoy the cool air!