Quote:
Originally Posted by Mikewb
really? cool. any help on the compressor question is appreciated. and thanks guys
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They are interchangeable with slight modification.... (brackets, line diameters i believe)
The only difference is as the year of compressor increases chevy got smarter and made it more efficient and lighter.
Quote:
Originally Posted by Mikewb
And how much difference in mileage is there from using ac and not. or is this a not true thing
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VIA MYTH BUSTERS: at 55mph ac will save gas vs windows down, anything less than a CONSISTENT cruising speed while running ac (ex stop n go traffic) will hurt u. a 75-77 compressor takes 20hp to turn.
Quote:
Originally Posted by baclay9
My Dad's factory r12 will flat freeze you out! 36 deg vent temps on 110 deg days
Posted via Mobile Device
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you lucky bum
Quote:
Originally Posted by Mikewb
and what all has to be done to convert to the diff coolant?
and if the condenser has been open for years is it bad?
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haha....u need to google to get alll facts but r12 is a oil base and 134 is a water base IVE HERED. i dunno how true this is.... but i do know u cannot mix the two and to "flush" a system is still not enough to convert to 134 u needed all new items to run safely.... some of my friends didnt flush, some did, some compressors went out in a week,. some are still going to this day... so the debate is high..... google and research, draw ur own conclusions.
Quote:
Originally Posted by tucsonjwt
Yes, but - the compressor needs to be in good shape and charged, R134A does not cool as well as R12(still available), (new EPA mandated refrigerant to be required soon), original A/C system has a lot of vacuum valves/actuators and cables/levers - so after 30 years or so those items need replacing/maintenance.
The original big A6 compressors were replaced with R4 but those usually have serpentine belt, not individual drive belts. Rebuilt compressors never lasted long for me, and a new compressor is many hundreds of dollars. If I had to bring an old factory A/C system back to life with a lot of repairs, I would check out the Vintage Air thread on this forum elsewhere - all electronic and more modern.
You probably give up 1-2 mpg with A/C on, but most of these old squares only get 10-12 mpg anyway.
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DUDE U CAN STILL GET R12!? not here in cali, stuffs like crackgold....everyone wants it. agreed, a rebuilt compressor is just as likely to fail vs a compresor off a junker.
Quote:
Originally Posted by Mikewb
can you tell if they have gone bad by spinning them? or another way?
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No.....no.
Remember, the only way a compressor gets lubed is when the ac is on. so if u get a compressor from a junkyard thats been sitting for 4 years, its seals r done.... get one from a still working system, not been sitting too long...
read ur service manuals, they state to run if for a min of 5 min every week no matter what season to keep the seals wet and full.
if u ask me, make ur own system. a compressor is just a fan, moving things at pressures, get a condensor, all relays and sensors (yesss they r present in ur old truck) and put them in, pice by pice......
