Fluorescent Dye Injection - Using an R-134a Loop/Add On Injector Kit-Set

WARNING: This page is about a different car, the 2008 Mercury Milan, 2008 Lincoln MKZ, and 2008 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Fluorescent refrigerant system dye is added to the refrigerant system at the factory to assist in refrigerant system leak diagnosis using a Rotunda-approved ultraviolet black light. It is not necessary to add additional dye to the refrigerant system before diagnosing leaks, even if a significant amount of refrigerant has been removed from the system. Additional refrigerant system dye should only be added if more than 50% of the refrigerant system lubricant capacity has been lost due to a fitting separation, hose rupture or other damage.

NOTE: Before using the R-134a Loop/Add On Injector Kit-Set for the first time, refer to the equipment manufacturer's instructions on evacuation of non-condensable gases from the hoses.

NOTE: Refrigerant system pressure should be between 413-551 kPa (60-80 psi) at 24°C (75°F).

Verify that the valves on the deluxe injector loop kit are closed.

Fig 1: Verifying Valves On Dye/Lubricant Injector Are Closed

Courtesy of FORD MOTOR CO.

Fill the R-134a Loop/Add On Injector Kit-Set reservoir with 7 ml (0.25 oz.) of fluorescent dye.

Fig 2: Filling Fluorescent Dye Injector Reservoir With 7 ml (0.25 oz.) Of Fluorescent Dye

Courtesy of FORD MOTOR CO.

Install the R-134a Loop/Add On Injector Kit-Set between the high-pressure and low-pressure service gauge port valves.

NOTE: Make sure all tools and hoses are clear of the engine cooling fan and drive belt before starting the engine.

Start the engine.
Open the high-pressure service valve.

Fig 3: Installing R-134A Loop/Add On Injector Kit-Set Between High-Pressure & Low-Pressure Service Gauge Port Valves

Courtesy of FORD MOTOR CO.

Open all valves and inject the fluorescent dye into the refrigerant system.

Fig 4: Opening All Valves & Inject Fluorescent Dye Into Refrigerant System

Courtesy of FORD MOTOR CO.

Close the high-pressure service valve to allow the pressure inside the R-134a Loop/Add On Injector Kit-Set to equalize with the suction side of the refrigerant system.

Fig 5: Identifying High-Pressure Service Valve

Courtesy of FORD MOTOR CO.

NOTE: Close the valves on the R-134a Loop/Add On Injector Kit-Set while the A/C compressor is operating.

Close the valves on the R-134a Loop/Add On Injector Kit-Set.

Fig 6: Closing Valves On R-134A Loop/Add On Injector Kit-Set

Courtesy of FORD MOTOR CO.

NOTE: Leave all valves on the R-134a Loop/Add On Injector Kit-Set closed when not in use.

Disconnect the high-pressure and low-pressure service valves and remove the R-134a Loop/Add On Injector Kit-Set from the vehicle.