The preferred method of leak testing is with the use of fluorescent dye. J 41447, R-134a A/C Tracer Dye, is the only fluorescent dye approved by Saturn. The fluorescent dye mixes and flows with the PAG oil throughout the refrigerant system.
Verifying some passive leaks may require using the J 39400-A , Halogen Leak Detector, even though the A/C system contains fluorescent dye.
The only time that adding additional fluorescent dye is required is after flushing the A/C system.
Fluorescent Dye Leak Detection
Not all of the fluorescent dyes are compatible with PAG oil. Some types of dye decrease the oil viscosity or may chemically react with the oil.
R-134a leak detection dye requires time to work. Depending upon the leak rate, a leak may not become visible for between 15 minutes and 7 days.
With the A/C system charged, add J 41447 to the A/C system using J 46297, A/C Dye Injector Kit. Follow the instructions provided.
To prevent false diagnosis in the future, thoroughly clean the residual dye from any area where leaks were found. Clean any refrigerant dye on components with brake and choke cleaner, Saturn P/N 21007432, or equivalent.
The dye injection package contains a notice sticker. Complete the leak detection information and place the sticker near the charge label.
Halogen Leak Detector
- Ensure that the vehicle has at least 0.9 lbs. (0.41 kg) of refrigerant in the A/C refrigeration system in order to perform a leak test.
Halogen leak detectors are sensitive to the following items:
Clean and dry all surfaces in order to prevent a false warning. Liquids will damage the detector.
NOTEFollow a continuous path in order to ensure that you will not miss any possible leaks. Test all areas of the system for leaks.
- Follow the instructions supplied with the J 39400-A, Halogen Leak Detector.