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  • 1 Post By 70eldo
The Classic Cadillac Forum Discussion, Air conditioning in Past Cadillac Vehicle Discussion; What's the best way to have a fairly trouble free ac? Mine has been converted to134 and the compressor was ...
  1. #1
    sawyer is offline Cadillac Owners Member
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    Air conditioning

    What's the best way to have a fairly trouble free ac? Mine has been converted to134 and the compressor was replaced as well, now I see the front seal is starting to leak oil I'm assuming due to the higher pressure that 134 runs at. Does anyone make a newer compressor designed for 134 that bolts in and looks stock? I'm thinking of flushing everything and going back to r12 because the condenser is not designed for 134 either. Anyone have any suguesstions?

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  3. #2
    carnut is online now Cadillac Owners Master
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    Re: Air conditioning

    Front compressors seals are designed to leak in that era of GM cars. It seeps to keep the front compressor seal lubricated.

  4. #3
    70eldo's Avatar
    70eldo is offline Cadillac Owners Connoisseur
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    Re: Air conditioning

    http://www.epa.gov/ozone/title6/609/.../retrguid.html

    Check the type of lubricant you used in your system
    CADforce69 likes this.

  5. #4
    sawyer is offline Cadillac Owners Member
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    Thread Starter
    Thanks for the replys I know about the oil deal but the problem is I didn't do the 134 conversion it was don when I bought the car, the compressor is a four seasons reman and from my experience they are not the best quality. I'm a mechanic but I have never had very good luck with 134 changeovers in gm, some seem to work ok and others not. I was wondering if someone made a sanden or a new Delphi that would work. Seems like vintage air or someone like them would make a conversion that replaced the compressor and condenser since from what I read those are the main reason that 134 doesn't work like it does in newer cars

  6. #5
    70eldo's Avatar
    70eldo is offline Cadillac Owners Connoisseur
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    Re: Air conditioning

    There are AC Delco remans offered at RockAuto and OPGI...

  7. #6
    BigEldo is offline Cadillac Owners Member
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    Re: Air conditioning

    Check out Old Air Products "Pro6Ten" Compressor. Modern bolt in replacement to the GM A-6 Compressor

  8. #7
    Cady70's Avatar
    Cady70 is offline Cadillac Owners Member
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    Re: Air conditioning

    I’ve never had much luck with my system converted. A year or two ago I refreshed my system again. This time with a new twist, a recalibrated POA valve. That I did along with the usual suspects (rebuilt compressor, dryer, expansion valve…). It still works blaah. I’ve done everything less adding a new style condenser. If I had it to do all over again I’d probably go R12.

  9. #8
    chrisntam is offline Cadillac Owners Fanatic
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    Re: Air conditioning

    After much research and posing the question in several Cadillac forums, it was suggested (and I did) to go with R-12. Happy w/ my decision (so far, no leaks, it's been about a month or so). '70 Deville convertible.

  10. #9
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    talismandave is offline Cadillac Owners Master
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    Re: Air conditioning

    I posted this in my Guido resto thread, so sorry for the re-run, but figured I should put it in this thread too.

    I looked up Delco Parts website and checked in my area for service centers that used Delco.
    They had a special mark they put by some of the repair centers that ordered so many parts they qualified to be Delco trained also.

    I then checked out Yelp, YP, and Google references for them and found a great service center a couple blocks from me. Also looked up my area in Car Talk website, "Click and Clack" mechanic reference area. I was impressed with the list they had in my area. Literally the "who's who" of Madison area independent garages. Based on the 90% of them I knew of personally, I was impressed to see the Delco one listed there.

    I contacted them about my AC and mentioned the discussions I had heard here about R12 vs R134 conversion. He pretty much agreed with the overwhelming opinions in this and other threads I have read on this forum.

    Conversion to R134 is a lesser way to go. He has done them and they will work here in WI where the season is short and milder, but will never be as cold as an R12 charged system.

    To do the change requires a lot of parts if you want it right. The molecules of R134 are smaller than R12 and will escape from the system quickly through the original equipment hoses.

    He had R12 and said he has been studying and experimenting with the R12 substitutes and is convinced he will be using them when he can no longer get/use R12.
    On his advise I replaced the old inop compressor with a new (not rebuilt) Delco AC and recharged with R12.

    Was a little over $900 with a few other parts required but has been ice cold all summer.

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