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Need a/c compressor

Discussion in 'Heat & AC' started by Pops, Oct 16, 2020 at 9:04 AM.

  1. Pops

    Pops Full Access Member

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    Joined:
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    Location:
    Brandon ms
    First Name:
    Ken
    Truck Year:
    1974 GMC Sierra Grande 2WD, 1976 Sierra 15 long bed
    Truck Model:
    Sierra 15
    Engine Size:
    350, 350
    I hope this is the right section for this.
    I brought home a 77 Burb w/front and rear air.
    I suspect it needs a new compressor.
    Any suggestions of where to buy one and is there a special type due to front and rear air?
    Thanks in advance. 7ED8790E-EE5F-4196-A5F4-FF0822289730.jpeg
     
  2. Backfoot100

    Backfoot100 Full Access Member

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    Florida
    First Name:
    Eddie
    Truck Year:
    1986
    Truck Model:
    C1500 Suburban
    Engine Size:
    Carbed 350
    You probably have an A6 (long and heavy) or an R4 ( pancake) compressor now.
    You can replace either one with new or rebuilt units but the quality sucks. The makers of these compressors has long been sold off many times over.

    I had an R4 in my rear air Sub and uograded the factory unit from R12 refrigerant to 134. It lasted a couple months before the compressor seized. I took a chance on a new R4 that was built to run 134. That lasted about 15 months before it stopped cooling and making some horrendous noises.

    I upgraded to a new modern Sanden compressor which requires new mounts and hoses but runs awesome. You'll find all kinds of similar posts on this site with the same recommendations.

    Really cool Sub by the way.
     
  3. HotRodPC

    HotRodPC Administrator Staff Member

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    First Name:
    HotRod
    Truck Year:
    85 K20 LWB / 86 K5
    Truck Model:
    Silverado / Silverado
    Engine Size:
    454 - Turbo 400 - 3.73 350 - 700R4 - 4.10
    Compressor is a bit expensive to just SUSPECT it needs one without knowing for sure. What makes you suspect it needs a compressor? Could have a low pressure switch keeping the clutch from engaging. Could be a bad clutch. Is their moisture in the system?
     
    Turbo4whl likes this.

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