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Date:         Tue, 26 Jun 2007 22:44:33 -0500
Reply-To:     John Rodgers <inua@CHARTER.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         John Rodgers <inua@CHARTER.NET>
Subject:      Re: A/C resuscitation - where to start?
Comments: To: Rob <becida@COMCAST.NET>
In-Reply-To:  <vanagon%2007062622422332@GERRY.VANAGON.COM>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Rob wrote: > At 6/26/2007 04:11 PM, mordo wrote: > >>> There is nothing wrong with R134a - if you have a system built for it. >>> But old Freon systems converted to the higher pressures of R134a can be >>> problematic. And I don't want problematic in the dog days of summer. >> >> After sitting over-winter last year, mine was blowing lukecool. I put >> one >> 12oz can of 134a in with leak seal and oil included. It got the system >> pretty darn chilly even at the front vents. > > I read somewhere that the 134a molecules are smaller than the 12 and > will leak out of the hoses (from the walls of the hoses) sooner than > 12 would. > > > > Rob > becida@comcast.net > > I have heard the same thing, though I have never read of a proof of this. But it would be a bit like putting hel.ium in a balloon. The helium eventually leaks out due to the small size of the molecules allowing the helium to pass through the interstices of the rubber in the balloon. After a while you have a saggy balloon.

Regards,

John Rodgers 88 GL Driver


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