But according to the service manual, 5.07 oz of the oil is in the
compressor, 2.02 oz in the evaporator, and penuts in all other parts of the
system. I believe you have to remove the compressor to drain the oil because
the drain plug in on top in the normal mounted position.

-Vince So
1989 Westfalia GL
1993 Miata
1997 LR Discovery

> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
> Of Budd Premack
> Sent: Monday, June 07, 1999 4:21 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: A/C compressor question - noise
>
>
> I shifted to R134a last summer in my 86 Syncro.  It kept me plenty cool in
> 95 F with a dewpoint of 75 F at Buses by the Arch last summer.
>
> Of course it is essential to eliminate all outside air flow with any a/c
> system.  Letting in outside air gives you hot air, and worse, fresh humid
> air, all of which has to be cooled and dehumidified by the a/c
> system.  Much
> of the energy in cooling goes to removing the humidity, so if you can keep
> fresh air out of the van, you will recirculate air that is progressively
> getting colder and dryer, which makes the system more efficient.
> Naturally,
> there is always a small bit of air leakage, but the goal is to
> reduce it to
> a minimum.
>
> Additionally, my a/c guru said that for longevity of the components, it is
> essential to replace the receiver dryer when shifting to R134a.
> This allows
> almost complete removal of the old oil, which can then be
> replaced by ester
> oil.  I am not an a/c expert, but I trust those who are, especially when I
> can drive around and keep plenty cool.
>
> Budd Premack
> 86 Syncro, 84 GL(for sale soon), 73 Super
> Minneapolis, MN (Land of Sky Blue Waters)
>