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Pressure testing
Posted: Sat May 27, 2017 1:26 pm
by walth
Checked the static pressure and it is down to 30psi, what is the best way to pressure test the system? Does it have to be evacuated first or can I use argon to pressurize it to find the leak then evacuate and repair? 99 Dodge truck.
Re: Pressure testing
Posted: Sat May 27, 2017 6:05 pm
by GM Tech
The best way to leak test is with a sniffer and UV dye- You can add a couple ounces of refrigerant to up the pressure to 80 psi or so-- the dye will tell you where it leaks- just not when it leaks- which is a good thing. Dodge trucks of your era are famous for evaporator leaks- so a sniffer in the vents, and UV dye evidence from the drain tube are paramount....