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Hi Guys,
I have a 1983 Mazda RX seven. I no longer have AC and my mechanic says that they do not sell the Freon that I need for my car. He can’t find a conversion kit. Does anyone know where I would find that?
Thanks
Hi Guys,
I have a 1983 Mazda RX seven. I no longer have AC and my mechanic says that they do not sell the Freon that I need for my car. He can’t find a conversion kit. Does anyone know where I would find that?
Thanks
There are write ups here about converting it using PC duster .
With the Sanden compressor, the best estimate I could get for total qty of oil is 5 oz. If you are going to switch from R12 to 152a (duster) then you'll want to clean your old ac oil out as best you can, install a new drier and make sure to use synthetic Ester oil, e.g. this stuff or similar:
Edit: For conversion you just add new pressure fittings to the compressor or use a gauge set that also fits R12 style fittings.
Wear latex gloves to avoid frostbite. and have diluted car wash handy.
I have heard that doing a straight conversion isn't good because the oils unless you get a new condenser or dryer , where would we go about getting new ones . The summer is coming up and I'm not looking forward to it .
From what I've read here, most of the oil that moves through the system ends up in the receiver/drier, and of course the bulk of the oil lives in the compressor. So you can get away with (as I did) removing the compressor, dumping the oil out of it and cleaning it... I did not use solvents, just gravity drained it like an oil pan, wiped it down. I wasn't sure if brake cleaner would attack internal seals or somesuch. I replaced the drier with this one:
You have to make sure you've got the right threads and a port for the pressure switch. It would be nice to have a sight glass, but not necessary. Make sure you put it in with the correct flow direction.
You can remove the various lines and spray them out with brake cleaner, I did not. Putting it all back together (Sanden compressor in my case) I used the ester oil above, put an ounce in the receiver drier and ~5 oz in the compressor. New green o-rings for the high and low sides of the compressor. Then I charged it like all the threads say and used 2 10oz cans of duster.
Edit: that receiver drier is a smaller diameter than the original one so you'll need to make up the space in the bracket.
From what I've read here, most of the oil that moves through the system ends up in the receiver/drier, and of course the bulk of the oil lives in the compressor. So you can get away with (as I did) removing the compressor, dumping the oil out of it and cleaning it... I did not use solvents, just gravity drained it like an oil pan, wiped it down. I wasn't sure if brake cleaner would attack internal seals or somesuch. I replaced the drier with this one:
You have to make sure you've got the right threads and a port for the pressure switch. It would be nice to have a sight glass, but not necessary. Make sure you put it in with the correct flow direction.
You can remove the various lines and spray them out with brake cleaner, I did not. Putting it all back together (Sanden compressor in my case) I used the ester oil above, put an ounce in the receiver drier and ~5 oz in the compressor. New green o-rings for the high and low sides of the compressor. Then I charged it like all the threads say and used 2 10oz cans of duster.
Edit: that receiver drier is a smaller diameter than the original one so you'll need to make up the space in the bracket.
The lines may be shot by now , I know you can have new ones fabbed that use the stock fittings in the car , they just swap the line .
This car with AC would be so nice . I recently started working in a law firm and I can't be showing up to work/ court all sweaty any more 😅
I have heard that doing a straight conversion isn't good because the oils unless you get a new condenser or dryer , where would we go about getting new ones . The summer is coming up and I'm not looking forward to it .
It worked ok for me. But I have nothing to compare it to. Daytime in the summer, my car still gets very hot.
04-05-23, 07:44 PM
