Quote:
Originally posted by BruceT
...snip...In one of the US bulletins on changing the a/c gas from R12 to the environmentally safe gases, it mentioned changing one of the flexible hoses by the compressor. How important is this? The a/c people I'm using (Subaru recommended) can't understand why...
Bruce
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The hoses only have to be changed if the hoses are new and designed for R-12. If they are old, they don't have to be changed. The reason is that old hoses have had their molecular "holes" plugged over time. The new 134 hoses have a finer "grain" to them than R12 hoses. This isn't my area of expertise so sorry about the loose technical terms there. I have no idea if anybody makes R-12 hoses anymore, I'm guessing not as it would be logistically easier to make hoses for both types using the same material. I changed from R-12 to 134 about a year ago when I needed a new compressor - no other changes made - works fine.