A/C refrigerants ... r-12 to r-134a or HC

[Joshua Van Tol]

The amount of refrigerant has little to do with the working pressures.
A properly charged R134 system (which on a conversion is typically 80%
of the R12 charge) will run higher high side pressures. This is due to
the pressure temperature relationship of R134, which is different than
R12.

I too have seen a broken rod on a york compressor, in a vw quantum with
a r134a conversion.

On Thursday, June 12, 2003, at 12:38  PM, Roa, Greg wrote:

> Ahhh, but this should be not an issue.  You are supposed to only use
> 80% of the volume of r-134a to compensate.
> As a side note, mine works fairly well after a conversion.  My
> compressor is weak, as shown by my gauge set, but even so, I get vent
> temps in the mid 40's after a few minutes.
>
> That said, when mine ceases to work, or when I do a turbo swap, I'll
> likely swap my york out for a sanden.  I'm not at all impressed by the
> york's lack of smoothness, and the huge power sap that it is.  It does
> cool the car though, so I can't complain too much.
>
> The york compressor is still used in r-134 applications on certain
> large trucks(freightliners), which says to me, that in a properly
> designed system, the york can work with 134a.
>
> Good Luck!
> Greg Roa
> Cincinnati, OH
> 86' 4kcsq
> 93' 90 CS
> 83' 944
>
>
>> From: ScottyCBoy at aol.com
>> Date: Wed, 11 Jun 2003 22:00:39 EDT
>> Subject: Re: A/C refrigerants ... r-12 to r-134a or HC
>> To: quattro at audifans.com
>>
>> --
>> [ Picked text/plain from multipart/alternative ]
>> In a message dated 6/11/03 8:25:38 PM Central Daylight Time,
>> abuc at attglobal.net writes:
>>
>>
>>>
>>> Do they say exactly why not? I'll have to take a look and see what
>>> kind of
>>> compressor my '87 4kq has. If it's just a matter of a bit less
>>> efficiency, I
>>> could live with it--I live in Seattle, not Kinshasa.
>>
>> The York (which your 4kq has) isn't up to handling the additional
>> pressures
>> of R-134a..... I've seen many a york with busted rods that were
>> running 134a...
>>
>> Scott