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AC Hose Replacement

R rrs1Member
About half way into this and getting ugly especially the hose connections under the dash. There's a tar like substance surrounding them with no room to turn wrenches. Now asking do I really need to replace them all? Yes, I am switching from the old R12 to R134. York type original compressor.

My plan was to just changes the hoses charge the compressor and that's it. I know it won't be a very good AC, but that's OK. Is there anything else I have to change? The hoses don't feel bad, except for their 40 year age.
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lousbbylousbbyMember
My hoses under my dash are original and I only replaced the ones in the engine compartment back in the late 80's. I converted my york compressor to R134 however I need to recharge each summer because I think the compressor leaks. I am no expert but If the hoses feel okay then I would give the conversion kit a try. I have used the conversion kit on my other cars and it works well.
panteradougpanteradougMember
quote:
Originally posted by markIV/ 4280:
r134 will leak through the original hoses,134 hoses are refered to as barrier hose, requiring specific fittings that must use a crimp on ferrule/collar.r134 will also leak out of the compressor seals if not cycled [run]regularly .


Yes agreed but what this means is that you need to put a pound of 134r in every May rather that a pound of R12 every 2 years.

R12 is noticibley colder, i.e., better. It gets the air down to about 37 coming out of the vents.

I've gotten my 134 down to about 40-41. That's enough to make it obviously very "nippie" in the cabin, which is obvious if you are wearing just a t shirt. Wink

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