idrivemopar
Well-Known Member
Apologies if I already asked this question, but I wanted to revisit.
Long story short, after I had all my ac system converted to 134a, I reassembled it, and found I had some contamination most likely in the evaporator as it was the only part that wasn't new or reconditioned, I only cleaned it out before reinstalling in the heater box when I was building the car. I also had a leak somewhere, so, after several rounds of trying to figure out where the stuff was coming from and where the leak was at, I decided to pressure flush the evaporator and pressure test it.
Now, I have a setup where I can just pull vacuum on the evaporator only, but I was expecting to get down to at least 24 (adjusted for elevation of 5K) on the vacuum, but I can only achieve 21. It will hold this vacuum for 48 hours and absolutely no drop whatsoever so I know there are no leaks in the evaporator.
My question, is it possible the gauges are faulty or the vacuum pump I have just cant handle pulling a good vacuum?
Both are harbor freight items, so this is why I am suspect. Also, ran the pump on the evaporator for an hour!
Any feedback would be helpful!!
Thanks
Long story short, after I had all my ac system converted to 134a, I reassembled it, and found I had some contamination most likely in the evaporator as it was the only part that wasn't new or reconditioned, I only cleaned it out before reinstalling in the heater box when I was building the car. I also had a leak somewhere, so, after several rounds of trying to figure out where the stuff was coming from and where the leak was at, I decided to pressure flush the evaporator and pressure test it.
Now, I have a setup where I can just pull vacuum on the evaporator only, but I was expecting to get down to at least 24 (adjusted for elevation of 5K) on the vacuum, but I can only achieve 21. It will hold this vacuum for 48 hours and absolutely no drop whatsoever so I know there are no leaks in the evaporator.
My question, is it possible the gauges are faulty or the vacuum pump I have just cant handle pulling a good vacuum?
Both are harbor freight items, so this is why I am suspect. Also, ran the pump on the evaporator for an hour!
Any feedback would be helpful!!
Thanks