Richard A Jones wrote:

>>Does the a/c system have a sight window anywhere for seeing bubbles in the
>>system? All my other cars have this but I don't see one for the westy?
>>
>>
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>The sight glass is usually part of the receiver/dryer.
>It works for R12 which is a single chemical compound,
>but not for R134a and others which are blends.  The
>R/D on my syncro westy is in the LR wheel well, but
>I've never cleaned it off to check.  I don't know,
>either, if newer R/Ds omit the sight glass since it is
>of no use anymore.
>
>                        Richard A Jones
>                        Boulder, Colorado
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R-134a (tetrafluoroethane) is a single chemical compound.
  I am unclear, however, why this should matter with respect to the
sight glass.

Larry A.