Fluorescent Leak Detection Method

TOOLS REQUIRED
^ J 41447 Fluorescent Tracer Dye
^ J 41436 R-134a A/C Tracer Dye Injector
^ J 28428-E High Intensity Black Light

IMPORTANT:
^ J41447 is the only dye approved by General Motors. Not all of the R-134a dyes are compatible with PAG oil. Some dyes decrease the oil viscosity or chemically react with the oil.
^ PAG oil is water soluble. Condensation may form on the refrigerant lines or on the evaporator core. This condensation may wash the PAG oil or the leak dye off of the line or off the core and out through the condensation drain Condensation may make some leaks harder to find using the dye detector. Fluorescence at the drain opening indicates a core leak.
^ R-134a tracer dye requires time in order to work. Depending upon the leak rate, a leak may not become visible for between 15 minutes and 7 days.
^ The dye, when mixed with the PAG oil, remains detectable in the system for 2 years. Do not double the system using dye. This may cause reliability problems. Use only the 0.25 oz charge.

Use a fluorescent leak tracer dye under the following conditions:
^ If the system has lost a charge
^ If the J 39400-A does not find the leak Fluorescent leak tracer dye mixes with R-134a PAG oil. When you inspect the leak locations using an ultraviolet light, the dye glows yellow/green.

The dye package contains a refrigerant leak detection notice sticker. Complete the sticker information. Place the sticker near the charge label.