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Thread: AC liquid line filter

  1. #1
    gallivan7 is offline Cadillac Owners Member
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    AC liquid line filter

    Converted my 93 seville to r134 but didn't flush the condenser as has been recommended. (read that after I completed the job) after 3 replacements of the orifice tube it seems to be mostly clean, but I would like to install a liquid line filter anyway. can get a flared connection type filter dryer from an industrial supplier for $10, but worried about being able to flare the aluminum tubing of the high side line. Auotacreapairs.com has a compression fitting filter for $60, but it is awfully small, yet cleanable.

    any thoughts or suggestions?.


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  3. #2
    basscatt's Avatar
    basscatt is offline Cadillac Owners 10000+ Posts
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    Re: AC liquid line filter

    the in-line filter is designed to trap metal particles from a blown compressor -
    your biggest problem is the two different oil types are NOT compatable -
    so an in-line filter won't help anything in your case -

  4. #3
    2kflhr's Avatar
    2kflhr is offline Cadillac Owners Enthusiast
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    Re: AC liquid line filter

    Sounds like the system needs flushing.

  5. #4
    gallivan7 is offline Cadillac Owners Member
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    Re: AC liquid line filter

    No oil left from the r12, and ester oil is somewhat compatible with mineral oil. what I really what to filter is debris.

    ----------

    a further note. my previous compressor was BLOWN! the first orifice I replaced had a chunk in it that completely blocked the tube. We are down to fine particles at this point. The compressor was replaced, also the accumulator, so as a security measure I want to add a filter BEFORE the orifice.

  6. #5
    mhamilton is offline Cadillac Owners Connoisseur
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    Re: AC liquid line filter

    Here's a filter designed for auto ac work: http://www.ackits.com/c/inlinefilter...e+Filters.html

    If the compressor did blow debris around the system, you're better off replacing that condenser. Not sure exactly which style was used in '93, but I think it was at least a piccolo, maybe a parallel flow. Can't really flush those out, the tubes are too small.

  7. #6
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: AC liquid line filter

    Quote Originally Posted by gallivan7 View Post
    No oil left from the r12, and ester oil is somewhat compatible with mineral oil. what I really what to filter is debris.

    ----------

    a further note. my previous compressor was BLOWN! the first orifice I replaced had a chunk in it that completely blocked the tube. We are down to fine particles at this point. The compressor was replaced, also the accumulator, so as a security measure I want to add a filter BEFORE the orifice.
    You do not need a filter. You need to flush the system. It should have been done before installing the new components, PARTICULARLY since you had debris in the system from the previous compressor. Gotta ask yourself, how many times do I want to evacuate the system to change a clogged filter, vacuum it down and recharge it? A filter would be like a band aid when stitches are needed.

    And as Mhamilton mentioned, you should be replacing the condenser and the accumulator as those components can't be flushed.

  8. #7
    gallivan7 is offline Cadillac Owners Member
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    Re: AC liquid line filter

    thanks to mhamilton for the link. going to check my ac delco dealer locally, or order from them.
    and this car survives on band aids, anything that keeps it going till its final death without spending a bunch of money is the what it gets.
    245,000 miles with many faults, but I still love it, my wife says way too much.

  9. #8
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: AC liquid line filter

    Ahh, that puts it in a whole different light.


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