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A/c whine

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    #1

    A/c whine

    So I'm curious what this is ... Got my a/c swapped up to 134a as far as I can tell they didn't do alot other than the adapter kit but it blows cold as 40f ever since I got it done I've had a whine sound when I start the car with the a/c button pressed and the a out of the blue one tonight was I was idling for a bit and put the car in drive with no a/c no blower and it suddenly started the whine il try to record it but it only last 15 /30 seconds if that any ideas



    Originally posted by evil_demon_01
    Do it once, do it right.
    Saving a dollar is not worth risking a life.
    Missing My
    White -91 LX Sedan - leather converted
    Mulberry 91 EX Sedan

    The project 92
    Tags: None
    #2
    Are you sure it's not your serpentine belts? With the AC button on, the AC compressor will engage when start and put stress on the belt. If it's old and slipping, it might whine.

    Comment

      #3
      Pretty sure it's not the belts no sounds under load while running the a/c it's just the start ups and the time tonight il get my deflection tool and check them though. Funny thing is it did it with no compressor load tonight all other instances make sence to a slipping belt



      Originally posted by evil_demon_01
      Do it once, do it right.
      Saving a dollar is not worth risking a life.
      Missing My
      White -91 LX Sedan - leather converted
      Mulberry 91 EX Sedan

      The project 92

      Comment

        #4
        I wonder if those guys that did your retrofit added oil also. Since they put in 134a and our cars came with R12 from the factory, you might want to ask them if they added any ester based oil. Another thing is if they used PAG oil while there was ester oil in there, it's going to gum up everything in your system.

        Comment

          #5
          Is the whining coming from underneath the hood? or is it when its blowing that you hear it inside the car? if its heard inside the car then your expansion valve is the problem

          Comment

            #6
            Originally posted by 93_FSWAP View Post
            Is the whining coming from underneath the hood? or is it when its blowing that you hear it inside the car? if its heard inside the car then your expansion valve is the problem
            I think it's no 2, going to the mechanic to check ... He said no leaks the day I got it charged I'm gonna have him check for leaks it's inside like if the blower wasn't working right and I toggled the a/c on and off and it whined then nothing then whined every time I bet that valve is bad ... Atleast I'm still getting cold air I just don't know if it's a get it done ASAP thing or not does having a bad valve have any worse problems than just the sound ?



            Originally posted by evil_demon_01
            Do it once, do it right.
            Saving a dollar is not worth risking a life.
            Missing My
            White -91 LX Sedan - leather converted
            Mulberry 91 EX Sedan

            The project 92

            Comment

              #7
              okay im confused .... tried losinging and tightening the serpintine belt and no luck , then it seemed to come from my fans area where the high pressure freon is so i jumped my fans at the thermo and they both ran fine its not in the car from what i can tell, its short 5 to 10 second sperts the longest was 20s not sure about the expansion valve becouse that would give me no cold air at all which im able to drive around cold air all day so i cant figure it out



              Originally posted by evil_demon_01
              Do it once, do it right.
              Saving a dollar is not worth risking a life.
              Missing My
              White -91 LX Sedan - leather converted
              Mulberry 91 EX Sedan

              The project 92

              Comment

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