A/C Compressor Shaft Seal Leak Detection with Dye

When leak testing a A/C compressor shaft seal using the leak detection dye method, there may be some seepage of dye from the seal, for the seal is a dynamic seal.
1. Use the instructions provided with the new R-134a leak detection dye injector tool J 41459 and inject dye into the vehicle's A/C system.
2. Run the A/C system 15 to 30 minutes (depending on the type of leak) to circulate the dye.
3. Using the J 42220 check for a leaking A/C compressor shaft seal.
4. If a leak is found, verify the leak with the J 39400-A because of the possible shaft seal seepage.
5. Make the necessary repair.
6. Clean the area of the leak after the repair so that residual dye does not indicate a false diagnosis in the future. Use a rag and the approved fluorescent dye cleaner J 43872 or equivalent to remove the excess dye.