AC Leak Testing for Ford, Mercury and Lincoln?

The procedure is similar for Ford Crown Victoria, Mercury Grand Marquis, Lincoln Town Car.          

Leak Testing

ELECTRONIC LEAK DETECTOR

FLUORESCENT DYE LEAK DETECTION

Details are follows:----

Electronic Leak Detector

Specific to:

Ford Crown Victoria 2008-2009

Lincoln Town Car 2008-2009

Mercury Grand Marquis 2008-2009

Good ventilation is necessary in the area where electronic A/C leak testing is to be carried out. If the surrounding air is contaminated with refrigerant gas, the leak detector will indicate this gas all the time. Odors from other chemicals such as antifreeze, diesel fuel, disc brake cleaner or other cleaning solvents can cause the same problem. Using a fan to ventilate the area to be tested before proceeding with the leak detection procedure is helpful in removing small traces of contamination from the air, but the fan should be turned off during actual testing.

NOTE

The vehicle-s engine should always be off when performing an electronic leak test to avoid false leak detection.

Fig. Electronic Halogen Leak Detector

CAUTION

Only a MVAC-trained, EPA-certified, automotive technician should service the A/C system or its components.

1. The system pressure should be between 60-80 PSI (413-551 kPa) at 75°F (24°C) with the engine off. Leak test the refrigerant system using the Refrigerant Leak Detector. Follow the instructions included with the leak detector for handling and operation techniques.
2. If a leak is found, recover the refrigerant.
3. Repair the system as necessary
4. Test the system for normal operation.

Fluorescent Dye Leak Detection

Specific to:

Ford Crown Victoria 2008-2009

Lincoln Town Car 2008-2009

Mercury Grand Marquis 2008-2009

Ford Motor Company vehicles are produced with R-134a fluorescent dye installed in the refrigerant system from the factory. The location of leaks can be pinpointed by the bright yellow-green glow of the fluorescent dye under a UV lamp. Since more than one leak can exist, make sure to inspect each component, line and fitting in the refrigerant system for a leak.

Fig. 12 Volt DC or 115 Volt AC, 120 Watt High-Intensity UV Lamp with detection-enhancing lenses

Fig. R-134a Fluorescent Dye Injector

CAUTION

Only a MVAC-trained, EPA-certified, automotive technician should service the A/C system or its components.

1. Check for leaks using a Rotunda-approved UV lamp.
2. Inspect all components, lines and fittings of the refrigerant system.
3. If a leak is found, recover the refrigerant.
4. Repair the refrigerant system leak(s).
5. Evacuate and charge the refrigerant system.
6. After the leak(s) is/are repaired, remove any traces of fluorescent dye with a general purpose oil solvent.
7. Verify the repair by running the vehicle for a short period of time and rechecking the area of the leak with a Rotunda-approved UV lamp.

This will help.

Thanks.

FOR MORE HELP GO TO: ---

Car repair guide?

http://technoanswers.blogspot.in/2012/03/car-repair-guide.html