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  •  » A/C Compressor

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    9/18/2013 11:42 AM  #1

    riwall
    FYI Addict

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    From: Sherman, Texas
    Registered: 4/02/2013
    Posts: 228

    A/C Compressor

    I have a bad bearing in my Sanden compressor ('67 Mustang) so I'll be replacing the compressor soon. I know that I will have to get a new dryer also if I change the compressor. I'm being told I should also change the expansion valve. The expansion valve was new a few months ago when I installed the Old Air Products interior kit. Is it REALLY necessary to change the expansion valve? Hate to spend 100 bucks if I don't have to. Thanks,  E.

     

    9/18/2013 12:16 PM  #2

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,490

    Re: A/C Compressor

    If the compressor shelled out some parts, I would replace the valve, as it probably was on the receiving end of some of those parts.  If the seals are just worn and it won't make adequate pressure, I would not bother changing the valve.  Just my opinion...

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    9/18/2013 12:37 PM  #3

    riwall
    FYI Addict

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    From: Sherman, Texas
    Registered: 4/02/2013
    Posts: 228

    Re: A/C Compressor

    The compressor is still working and cooling well. A couple of days ago the A/C system suddenly shut down. I found that the fuze had blown. I replaced the fuze and the A/C is blowing cold but the compressor is making a chirping (?) noise when the A/C is on. A normally reliable mechanic friend told me that it was a bad bearing. I thought I would change the compressor before any real damage is done. I'm just not sure what else I need to change out. E. 

       •Thread Starter
     

    9/18/2013 1:03 PM  #4

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,490

    Re: A/C Compressor

    Be sure the clutch is getting full voltage.  It could be slipping causing the chirp.  You can run a hot wire to straight from the battery to the clutch.  If noise persists, your friend is probably right.  If it goes away, you can replace the clutch or rewire it, and that does not require opening up the system.

    I do not think I would mess with the valve.  If it cools well, obviously the valve is not plugged up.

    Last edited by MustangSteve (9/18/2013 1:03 PM)

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    9/18/2013 1:04 PM  #5

    whlnut
    I FYI 24-7

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    From: Brunswick, GA
    Registered: 4/02/2013
    Posts: 317

    Re: A/C Compressor

    It may be the replaceable bearing on the clutch. If so, no internals would be involved.

     

    9/18/2013 1:20 PM  #6

    riwall
    FYI Addict

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    From: Sherman, Texas
    Registered: 4/02/2013
    Posts: 228

    Re: A/C Compressor

    We checked power going to the compressor. It is getting 16 volts. My "normally reliable" mechanic friend told me that he doesn't think the noise is coming from the bearing under the pulley. He thinks there is another bearing where the shaft goes into the body of the compressor and he thinks that is where the noise originates. E.

       •Thread Starter
     

     

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