• Login or Register Here.
  • Login is located in the upper right corner of all pages.

Announcement

Collapse
No announcement yet.

Flushing an Automotive AC System

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #16
    AC is still working fine.
    I guess the noise is expanding freon rather than a compressor noise.
    After opening the hood and listening to the compressor, it sounds smooth and quiet.

    This was an experiment in flushing the AC system with denatured alcohol rather than expensive store bought flushing agents.
    At this point I would call it a success and will go this route again in the future.

    A GALLON of denatured alcohol was $20 and did the heavy lifting in removing metal and other debris in the system.
    I used ONE quart of commercial flush compound after the denatured alcohol flush.

    If you are a DIY person, please don't forget to flush your new evaporator core, like I did this time.
    Save yourwself tons of headache.

    Comment


    • #17
      UPDATE
      Almost 10 months later.....

      AC still working fine. Nice and Cold in the car and today it was 95F outside.

      Comment


      • #18
        IDK how I missed all that even 10 months worth? Anyway if it's now worked especially on a used compressor and didn't see a "condenser" mentioned as new it's hard to argue anything now. Good luck for it to last a good long time for you,
        Tom
        MetroWest, Boston

        Comment


        • #19
          Originally posted by Tom Greenleaf View Post
          IDK how I missed all that even 10 months worth? Anyway if it's now worked especially on a used compressor and didn't see a "condenser" mentioned as new it's hard to argue anything now. Good luck for it to last a good long time for you,
          Thanks Tom.
          I was mostly concerned with using a substitute for very expensive flushing chemicals.

          Apparently it worked. I did not change the condenser.
          Used compressor I just pulled off another vehicle at U-Pull-It junk yard.

          If the time comes I need to open the system again I will probably change the condenser just to be safe. It's very cold now, but still not "quite" as cold as a new car system.
          But cold enough to make the inside of a Dodge Caravan chilly on a 95 degree day.

          Thanks for the positive reply.

          Comment


          • #20
            It works is the end game for this. Reason for tossing condensers is they are such fine paths and clog or anything shutting down one end you can lose more than just what got plugged - debris from compressors is the reason.

            Used is scary but did and would. Look for a right one still in the car see by clues it was working, has pressure and not out in the weeds for long. Read inspection stickers and know a ton about it.

            All worked! That was a lot of work to find a non front end wreck.

            Chems etc the costs are nasty IDK how to help that. Compressed air for some stuff at high volume. Make sure what you use is dry and not still in it of course. IDK how that would mess up but it wouldn't be working long if things weren't right,

            Tom
            MetroWest, Boston

            Comment


            • #21
              UPDATE: 1 year 3 months..... (After flush with alternate flushing solutions)

              Still going strong.

              Click image for larger version

Name:	EnergizerBunny.jpg
Views:	35
Size:	13.1 KB
ID:	3625

              Comment


              • #22
                Good to hear!

                Comment


                • #23
                  With complete sincerity and honesty, it is still working very well. I did add a little freon about 6 months ago I think but that was only because it seemed that originally I used the bare minimum. As of today, the air coming out the vents is nearly factory cold.

                  I did not change the condenser, only the evaporator a while back. If and when I need to open the system again I will probably change the condenser since I know that over time they become clogged and corrode.

                  The one thing I wish I could do is flush the evaporator and housing without a full disassembly. If someone came up with a system to do this they'd get rich I think because the primary reason evaporators in vehicles go bad is from rotting leaves and debris that ends up at the bottom of the inside of the housing. If you could flush all that gunk out once a year the evaporator would probably last twice as long.

                  That said, when I changed my evaporator I added green 1/2 filter foam to all the inlets behind the wiper tray to help keep some of that out. Not sure if it's doing the job but it should be as far as I can tell. Still, I really wish I could flush the evaporator housing once a year of so to flush the dirt, leaves, rotting bugs etc out. If you get a musty odor from your vents that is likely what you are smelling and you'll likely soon be needed an evaporator core. $$$

                  Comment


                  • #24
                    Long time span and long thread now! Glad to hear it's still working. I think you are right on evaps and debris that gets in there down thru inlets usually right at wipers (any vehicle) assorted effectiveness to keep stuff out. That and different places it's parked (under a tree?) or other source of yuk.
                    I'd check that your foam doesn't degrade and be the next debris most things don't do well with heat, wet, cold and where I am ICE down there plus room from wipers to move BEFORE YOU TAKE OFF IN THAT CAR/TRUCK/Van or whatever.

                    Also a cause to plug drain and flood interior so it all matters. Glad to hear it's working and your ideas of some solutions would like to know what and where the type of foam stuff is if you'll post it,
                    Tom
                    MetroWest, Boston

                    Comment

                    Working...
                    X