Freon capacity ((in pounds)

Discussion in 'Troubleshooting & Diagnosis' started by GPN, Aug 6, 2017.

  1. GPN

    GPN Veteran Member

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    Oct 5, 2016
    having R12 added to my 1979 Z. Can anyone tell me the capacity of the system?
     
  2. ol' grouch

    ol' grouch Veteran Member

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    Jul 4, 2013
    Evansville, In.
    There should be a sticker on the components somewhere if you're using factory parts. I have capacity tables somewhere but it may take a while to find them. Are you sure you're getting R-12 and not converting to R-134? R-12 hasn't been available for years since Duponts patent expired and they got it outlawed. Unless you're getting some stuff that's been sitting, it isn't R-12.
     
  3. Bandit723

    Bandit723 Veteran Member

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    Oct 1, 2016
    Waupaca WI
    Service manual say's 3 LBS 4 OZ.
     
  4. GPN

    GPN Veteran Member

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    Oct 5, 2016
    Great Thank you
     
  5. Twisted_Metal

    Twisted_Metal Moderator Staff Member Lifetime Gold Member

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    Feb 26, 2004
    Bloomington, MN
    The Harrison sticker on my evaporator case says: 3.25 lbs.
    A little difficult to get here but R12 is still made in Mexico.
     
  6. GPN

    GPN Veteran Member

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    Oct 5, 2016
    IMG_0566.JPG
    Tnx, I'll check for sticker. Am fortunate to have some real R12.
    goid to know. Tnx
     
  7. Twisted_Metal

    Twisted_Metal Moderator Staff Member Lifetime Gold Member

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    Bloomington, MN
    Mine is an '80 Berlinetta but I'm pretty sure the system is the same as your '79 Z28 except for a couple of metric bolts for the compressor mount on my '80.

    Bandit confirmed the capacity from the manual.
    Good Job, Mike! :D

    If it was a 79 Z28, RS... I don't know anything about them.
     
  8. wnmech

    wnmech Veteran Member

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    Jul 20, 2014
    grand prairie tx.
    I was buying R12 for my old corvette on craigslist for $10 a can. It's still out there and since most systems have been converted people are selling it cheap.
     
  9. GPN

    GPN Veteran Member

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    Oct 5, 2016
    Agree
     
  10. harbone66

    harbone66 Veteran Member Lifetime Gold Member

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    Central Illinois
    I have had a 30lb pig of R12 in my garage for almost 15 years. Probably havent used 6 pounds out of it in that time. I always think about selling it but you never know when an old system might need a recharge.
    If you are converting to R134a it will take less freon, if I remember correctly when I converted the 79 trans Am it took 2.4 pounds.
     
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