There are a number of various brands and types of 'sealers' that are
supposed to help combat this problem; I haven't used any and I'm generally
suspicious of them in the same way that I'm suspicious of coolant system
'stop leaks'. Perhaps someone that has used 'em has some info for us?

Cya,
Robert

----- Original Message -----
From: "Roger Sisler" <rogersisler2000@YAHOO.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, May 13, 2005 9:54 AM
Subject: Re: AC Service Prior to Pressure

> Another consideration- 134a will need new barrier hoses to prevent leaks.
> If you dont mind a leaky compressor and wrong hoses , you will be ok.Just
> recharge every year till the compressor cant take the pressures anymore.
> 50
> feet of barrier hoses , using your old fittings will cost about
> $350.Commparison of the two molicules is that the R_12 molecul(sp-again!)
> is like a beach ball , and a 134a molicule is like a golf ball.It will
> migrate through the rubber.Being enviornmentaly correct with vanagon a/c
> is
> difficult any way you go, unless money is of no concern.It may actually be
> much cheaper to go r-12 is many cases.