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Search results

  1. J

    1986 suburban a/c problems,

    Sorry, its a work of love, and more of a restoration. A/C and cooling system tests were my favorite at work. The balance required to operate two systems off one pump makes this a very interesting problem, throw in a gas change and it makes you really think about what is happening inside the...
  2. J

    1986 suburban a/c problems,

    PS, after 38 years as a professional tech, the last 20 with the Caterpillar Proving Grounds in Green Vallet Az,NOTHING gets slapped together. I will let you know what I find
  3. J

    1986 suburban a/c problems,

    The orofice is NOT varible, but for high ambient temps, the evap is a factory replacement, the rear air works, the front is warm. I w
  4. J

    What im driving,

    Burb pics
  5. J

    What im driving,

    Is there a specific orifice tube for 134a with rear air
  6. J

    Missy goes full retro

    So I have an 86 burb, what kinda body do you call it?
  7. J

    1986 suburban a/c problems,

    The evaporator is new
  8. J

    1986 suburban a/c problems,

    P C/o parts is not a problem, this is my retireme nt truck, I don't think I mentioned it there are not very many old parts left on this truck, bumper to bumper I think the steering box is yet to be changed but not much more. Everything i found online said 72 ounces of r 12, so i put in 60...
  9. J

    1986 suburban a/c problems,

    It had a stock new orifice tube with the same problem, had to c/o lines so put another orifice tube in
  10. J

    1986 suburban a/c problems,

    Factory1986 suburban w/rear ac, had poorly working r12, replacedr4 compressor, replaced evaporator , replaced rec/dryer ,replaced orifice tube with non varible, high ambient(105f and above)replaced every oring front to rear, replaced dual line from compressor to condenser and to evaporator. New...
  11. J

    1986 suburban a/c problems,

    Morning 85-90 degrees, dual elec fans(condensor) plus new flex fan on engine, low side 35-40 high side 225-250, while charging, rec/dryer is cold, after charging rec/dryer gets warm, rear air works, the only old part left is rear expansion valve, will remove valve and see if its stuck open
  12. J

    1986 suburban a/c problems,

    The only part not replaced is the expan valve, if it is stuck wide open, pressure will take the path of least resistance and go thru the expan valve instead of a good flow to the new orifice up front. What do ya think?
  13. J

    What im driving,

    1986 suburban, the list is exhaustive 400 horse small block, summit 202,160 heads, headers, msd, comp cam(268h) 4l80e trans/compushift computer (lots of work) 12 bolt posi( eaton new gear unit) Derale trans cooler 4 row core alum rad All new suspension w/ air bags in rear Leather buckets Sound...
  14. J

    1986 suburban a/c problems,

    Rear ac works great front is warm, stuck expansion valve in rear a/c?
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