Having had the engine out of my project A2 and done items such as: 6 speed MYP, cam belt kit, clutch and DMF, oil chain tensioner. I had the AC recently re-gassed. A nitrogen pressure test was performed followed by a vacuum test which the system passed. The system was fill and initially worked. 2 days later all the gas was gone. I revisited the air con shop and they pointed out a few potential leaks which led me to replacing the pressure switch (for which there was also a fault code), the large oring in the connection to the pump and the radiator/condenser. There were no obvious leaks elsewhere indeed even in these areas any potential leak was not very obvious. I had it pressure and vacuum tested again and refilled. Exactly the same result, no pressure after a couple of days. The pump (one time) clutch is good.
I would have thought with the fluorescent dye that is added that a leak big enough to empty the system in 72 hours would spray the dye everywhere and the leak would be clear to see. But there is no obvious signs of the leak. The fact that the system also hold pressure and vaccuum on test has left be completely stumped.
Any suggestions from the wise or experience?
Trevor
I would have thought with the fluorescent dye that is added that a leak big enough to empty the system in 72 hours would spray the dye everywhere and the leak would be clear to see. But there is no obvious signs of the leak. The fact that the system also hold pressure and vaccuum on test has left be completely stumped.
Any suggestions from the wise or experience?
Trevor