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Originally Posted by jcyuhn
That's too much of a drop. A tight system will show almost no movement overnight - perhaps a needle's width on the low side guage.
However. Has the system been run since the condensor/compressor/dryer were replaced? The 'used' oil can hold a surprising amount of refrigerant, even while open to the atmosphere.
Basically, we can't tell if your system is tight or not. Vacuum it for several hours - perhaps 4 - then let it sit overnight. If you get a lot less vacuum loss, that's a good sign.
- JimY
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Thanks!
The system was never 'run' because the evap was leaking. However, it would hold pressure (10-20psi) so I shot gas into it while I waited for the evaporator to arrive.
I'll run the pump for a few hours when I get home and then let it sit overnight to see what happens.