[DML] Re: Air Conditioning / Clicking Noise

[Michel Poulin <mpoulin@xxxx>]

Mark, thanks for your input.
I'm thinking of replacing the AC clutch on my 85 van (It's dead). I was
talking to my local Auto-Zone manager and he's the one that told me about
the R-134a. His price was considerably less for the R-134a then the R-12.
I asked if I would have to replace any other parts in the system, he told
me I would only have to drain the old system, and refill w/ R-134a. I'm
glad that this issue came up here as I'm sure he wouldn't mind me comeing
back in a year for another A/C compressor. His ignorance would effect my
pocket book greatly. I guess it all comes back to.... Talk to your
FRIENDLY DMC mechanic when you want it done right... even if the job is on
another vehicle! ;)
Again, thanks, you saved me a bunch of money, and possibly some other
DMC owners. I'm sorry for sugesting the R-134a
-=mike=-
restoring VIN #702

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On Thu, 27 May 1999, Marc A Levy wrote:

> Not to get in to a long thread on this, but this is really a matter of
> opinion. I think it may be covered well in the back issues.

> The most common conversion is to R-134a.

> R-134a runs about 70% higher pressure than R-12, so it is required that
> all of the O ring seals are replaced. The compressor was not designed
> for this higher pressure, so your 17 year old compressor may also not be
> too happy with the R134-a. Also know that R-134a does not get as cold
> as R-12, and for those of us who have been in the DMC on a hot day know
> the cooler the better!
> 
> For a proper conversion, the system must be well flushed. If you simply
> remove the R-12, replace the seals, and recharge you will be replacing
> the compressor within a year. This is due to the mineral oil that is
> used with R-12. When R-134a mixes with the oil, it turns to a sludge
> that will clog the orifice and dryer.
> 
> R-134a is great for a car that was designed for it. The DeLorean was
> not. Stick with R-12.

> .... R-12 works, why change?)


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