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Thread: Refurbing a Very Early A/C System

  1. #51
    Senior Member NckT's Avatar
    Join Date:  Jun 2011

    Location:  Yorkshire UK

    Posts:    198

    My VIN:    No. 4068

    That looks good to me. Good luck with the recharge. 975g of r134a have great results for me and others.

    Don't forget to adjust the low pressure switch so that the compressor comes on at approx 44psi and off at approx 20psi. Run the engine at 1500rpm by applying 'bodge the throttle open with a screwdriver at the throttle stop' technique

    How much ester oil did you put in overall?
    RIP Rob van de Veer Top bloke

    I say Sir, I must be mad, one loves fixing K-Jet !

    Make sure there's plenty in the tank for the weekend chaps....

  2. #52
    Senior Member DMC5180's Avatar
    Join Date:  May 2011

    Location:  Reedsburg, WI

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    My VIN:    5180

    Club(s):   (DMWC) (DCUK)

    Quote Originally Posted by NckT View Post
    That looks good to me. Good luck with the recharge. 975g of r134a have great results for me and others.

    Don't forget to adjust the low pressure switch so that the compressor comes on at approx 44psi and off at approx 20psi. Run the engine at 1500rpm by applying 'bodge the throttle open with a screwdriver at the throttle stop' technique

    How much ester oil did you put in overall?
    He’s staying with R-12
    DENNIS

    VIN 5180, Frame 3652, STAGE II​, DM-eng Solid State Solutions (RPM Rly, Dm.Lt.Mod., Fan Fail Mod. , FAN Rly, HS.Rly) , HID headlights, SPAX user since 2009, Eibach springs, M Adj. Rear LCA's, DPNW poly-sway bar kit, DMCEU LCA Stabilizer link kit, DMCMW Illuminated door sills, Aussie Illuminated SS Shifter plate, REAL MOMO EVO Steering wheel, DELOREANA Extended View Side Mirrors w/ Heaters, DELOREANA LED Door Lights.

  3. #53
    Senior Member NckT's Avatar
    Join Date:  Jun 2011

    Location:  Yorkshire UK

    Posts:    198

    My VIN:    No. 4068

    I didn't realise you can still get ozone depleting refrigerant R-12 in America. It's banned elsewhere.
    RIP Rob van de Veer Top bloke

    I say Sir, I must be mad, one loves fixing K-Jet !

    Make sure there's plenty in the tank for the weekend chaps....

  4. #54
    Senior Member
    Join Date:  Jul 2017

    Location:  Indianapolis, Indiana

    Posts:    160

    My VIN:    04629

    A few years after acquiring my car a local Car Dealer closed his business, I had the chance to go through the tools, before the Auction Co. came in to sell everything else.

    I was lucky a Dial-A-Charge for $100 and it had 30lb of R-12 attached! I won't ever run out of this refrigerant.

    My next charge, I'll flush my system. (a few years down the road)

  5. #55
    Senior Member DMC-81's Avatar
    Join Date:  Apr 2014

    Location:  Florida

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    Results

    Here are the Results:

    Initial performance baseline before refurbishment. Cold engine at idle, ambient temperature 81 degrees, A/C on MAX with fan speed 3 => center vent temperature at 82 degrees (basically, no A/C):


    Results after A/C system refurb and charge: Warm engine at idle, ambient temperature 80 degrees, A/C on "NORM" with fan speed 2=> center vent temperature at 48 Degrees:


    Dana

    1981 DeLorean DMC-12 (5 Speed, Gas Flap, Black Interior, Windshield Antenna, Dark Gray)
    Restored as "mostly correct, but with flaws corrected". Pictures and comments of my restoration are in the albums section on my profile.
    1985 Chevrolet Corvette, Z51, 4+3 manual
    2006 Dodge Magnum R/T (D/D)
    2010 Camaro SS (Transformers Edition)

  6. #56
    Senior Member DMC-81's Avatar
    Join Date:  Apr 2014

    Location:  Florida

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    Update

    Just a one month update:

    I replaced the tape around the A/C heater hose cover (105847), that I forgot to do at installation, and that made a difference in my vent temps. I read 42 degrees on the Bi-Level mode, fan speed 2 on my way home after the CFIAS show. Also, my system is still holding pressure. That's good news for a rebuilt compressor & accumulator and original hoses.

    So far so good.
    Dana

    1981 DeLorean DMC-12 (5 Speed, Gas Flap, Black Interior, Windshield Antenna, Dark Gray)
    Restored as "mostly correct, but with flaws corrected". Pictures and comments of my restoration are in the albums section on my profile.
    1985 Chevrolet Corvette, Z51, 4+3 manual
    2006 Dodge Magnum R/T (D/D)
    2010 Camaro SS (Transformers Edition)

  7. #57
    Gess dodint's Avatar
    Join Date:  Nov 2015

    Location:  Pittsburgh, PA

    Posts:    363

    My VIN:    Between VINs

    What an engaging read. Thanks for putting it all together and sharing.

  8. #58
    Senior Member NckT's Avatar
    Join Date:  Jun 2011

    Location:  Yorkshire UK

    Posts:    198

    My VIN:    No. 4068

    Excellent well done
    RIP Rob van de Veer Top bloke

    I say Sir, I must be mad, one loves fixing K-Jet !

    Make sure there's plenty in the tank for the weekend chaps....

  9. #59
    Senior Member DMC-81's Avatar
    Join Date:  Apr 2014

    Location:  Florida

    Posts:    2,371

    My VIN:    <2000

    Club(s):   (DCF)

    Thanks guys! It was an enjoyable exercise and I hope the thread is helpful.
    Dana

    1981 DeLorean DMC-12 (5 Speed, Gas Flap, Black Interior, Windshield Antenna, Dark Gray)
    Restored as "mostly correct, but with flaws corrected". Pictures and comments of my restoration are in the albums section on my profile.
    1985 Chevrolet Corvette, Z51, 4+3 manual
    2006 Dodge Magnum R/T (D/D)
    2010 Camaro SS (Transformers Edition)

  10. #60
    Senior Member BABIS's Avatar
    Join Date:  Sep 2012

    Posts:    520

    Quote Originally Posted by DMC-81 View Post
    I replaced the tape around the A/C heater hose cover (105847), that I forgot to do at installation
    I still have to replace that tape after my a/c box resto, but I don' t rembember if it was just around the pipes or around the whole #105847 seal, can you point me in the right direction? Thanks!
    Let us reply to ambition that it is she herself that gives us a taste for solitude.

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