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