leak detection under vacuum
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Junior User
Joined: May 2003
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From: West KY
leak detection under vacuum
I am about to pull a vacuum and then recharge on my 1979 bronco. It currently does not have enough refrigerant to cool at all and I think it might have been open for a short time. Question is when I pull the vacuum, is there a way that I can pinpoint leaks without having to charge it? Would the soapy water method work under a vacuum or any other method?
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Joined: Jun 2004
Posts: 6,327
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From: Amarillo, TEXAS!
Don't use soapy water under a vacuum.You don't want to be sucking water into the system.
If you pull a vacuum to more than 29 inches, close the valve to the pump and shut it off, it should hold for an hour. If you are still concerned about a leak, you can pressurize the system with dry nitrogen then use the soapy water.
If you pull a vacuum to more than 29 inches, close the valve to the pump and shut it off, it should hold for an hour. If you are still concerned about a leak, you can pressurize the system with dry nitrogen then use the soapy water.
