New hoses for R134A AC ?
09-08-2002, 03:18 AM
#1
Three Wheelin'
Thread Starter
New hoses for R134A AC ?
I was speaking to a Porsche maintainer recently who said that it was highly desireable to replace the rubber sections of hose in the AC lines and the expansion valve when changing from R12 to R134A. Has anyone had any problems with changing to R134A without changing the expansion valve and hoses? i.e is it really necessary to replace h expansion valve and rubber hoses ? I am aware of the need to replace the oil after draining the
original oil from the compressor.
Cheers,
Wayne.
original oil from the compressor.
Cheers,
Wayne.
09-10-2002, 01:33 AM
#5
Pro
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chritian is correct bull**** just put the 134a in it wont be as cold unless you know the secret trick which ill divolge get a pan of hot water not boiling just tap water hot the system will hold 2.5 cans but if you put the last can in and place it in the hot water it will force in the extra amount thus cool factory air baby.hope that helps.
09-10-2002, 01:42 PM
#6
Racer
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Ditto. My good friend did NOTHING to his '83's existing system. He just bought the $20 charge kit and did the hot water trick...four months later you can still almost see your breath in that freaking car. And unless we get the oil barons out of the White House, it looks like we'll need the a/c year-round.
09-10-2002, 02:22 PM
#7
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I've been reading up on R134a conversions, trying to figure out exactly all that I need. It looks like you need a conversion kit, which have the conversion fittings, and most of them have the oil. Some have the refrigerant also. There is also this flush stuff you can buy that you are supposed to flush the system with to get all the junk and R12 stuff out with. Does anyone have any experience with the flush? Is it really needed? My A/C barely cools as it is (almost out of refrigerant), so would I be able to just charge with R134a from there? Also, has anyone had any luck with the charges that are supposed to plug up small leaks?
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09-10-2002, 02:40 PM
#8
Racer
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My advice would be: Just charge it with 134. Then if it does leak, THEN you can do the "recommended" conversion. The 134 is so inexpensive, worst case scenario, you're out about 20 bucks. Best case scenario, for only $20 you've got meat locker air.
09-10-2002, 10:31 PM
#9
Racer
Good discussion!
I hope this isn't a lame question, but where do you get the conversion kit you have been talking about? Is this a generic one or 944 specific? FInally, if there are new fittings involved, are there any clearance or modification issues that need to be taken into account? Thanks for the assistance and advice.
I hope this isn't a lame question, but where do you get the conversion kit you have been talking about? Is this a generic one or 944 specific? FInally, if there are new fittings involved, are there any clearance or modification issues that need to be taken into account? Thanks for the assistance and advice.
09-11-2002, 07:58 PM
#11
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The molecules in R134A are smaller than R12. Ideally you want "barrier" hose so you don't lose the charge as fast. I think if I were replacing the condenser or doing major surgery I'd replace the hoses since they are prone to leak anyway. Otherwise I'd probably just do the conversion and hope for the best.
