I'm about to replace the compressor on my RX-7 and I'd like to leak test with dry nitrogen before I put refrigerant in. Can I go down to the local welding gas supply house and get everything I need to hook the cylinder up to my guages?
Is it sufficient to pressurize the system to a known number, then see if it holds pressure for 24 hours, or do I need to squirt in some R-22 and use an electronic sniffer for best results?
EPA lets you waste a can of R-134a for leak testing, works great with a sensitive electronic detector, least they did, figured better to waste a can then to leak out all over the world.
Much easier than fooling around with liquid nitrogen and you will also need a regulator to bring that pressure down to within reason. If using R-12, just get rid of that R-134a, and you are safe to go.
I use nitrogen for pressure testing ect. I have a small cylinder that came from a local gas supplier.
You will also need a regulating valve to drop the bottle pressure down from 3000psi to a more manageable 10-200 psi.
All these things cost, so your better off for home use with R134can and a leak detector.
Once Navy alway Navy
Thanks guys! R-134a and a leak detector it is!
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