Posts: 1561
Joined: 8/24/2005 From: Brooklyn, NY Status: offline
where do you connect a rechargeble botle for AC on my car? also I ask this becouse I had to empty the AC when I was changing my radiator. or the AC radiator its writen 134a for type of the system. is it true? or I have 12 system? Tnx.
I have no idea what year your car is or what compressor you have, but on the older 90's, the low pressure side is on top of the compressor and labeled "S" (Suction). If its a R134a system, the connectors are different than the R12. They are quick connect type and different sizes...the low pressure side is smaller than the high pressure side. R12 system connectors are screw on type and IIRC the same size. Dont let the caps on the fittings fool you either, they are screw on caps on both systems so you have to remove the caps and look at the fittings. The low pressure side is where you want to connect the charge to. And if the system has been drained, BE SURE TO PUT THE CORRECT OIL CHARGE IN OR THE COMPRESSOR WILL BE DESTROYED!!!
the coup is the only 1990 model listed with the 2.8 engine here in the UK, low pressure service connection is near the A/C clutch and high pressure service connection is on the other side of the condenser and lower down height wise, a bit like general house plumbing high pressure at lower level and vent higher up
Posts: 1561
Joined: 8/24/2005 From: Brooklyn, NY Status: offline
when I was down there I saw something like the connector on the ac compressor, it was in the middle of the compressor on bottom half, if I remember correctly. so for example if I put R12 into R134a it will destroy the compressor. what if I put R134a but possibly different company that wont destroy compressor, right? I ask that becouse, well I dont whant it to go bad, The freon contains oil so it will help compressor to leve for long happy years. and make me happy too, during summer. I saw R134a recharge bottle at autozone. its medium. what is the capacity of your AC system? to understand how much will I fill up with that small/medium bottle.
Posts: 1561
Joined: 8/24/2005 From: Brooklyn, NY Status: offline
I think the can is 500grams, so I will go soon to autozone and buy it. it doesn't really matter what style r134a I will use colorord or not? they can both mix? or just becouse I have empty system any one will go?
Cant mix R12 and R134a...The oil is different/incompatable and, IIRC, the R134 molecule is smaller and gets squeezed through the seals and "O" rings and causes leakage after a while or something like that. From what I remember, the proper way to convert is to replace the receiver/drier with new, replace all seals and "O" rings, and drain/flush the condensor, compressor, evaporator and all lines.
Most auto parts stores will sell you a conversion kit that includes the R134 pre mixed with oil, adapters for the low and high side fittings and some even have a gauge to tell you when you have a proper charge.
I know people that have just drained the entire system and filled with R134a and the proper oil charge and have had no problems. But convert at your own risk...or pay through the nose for a shop to do it.
Posts: 1561
Joined: 8/24/2005 From: Brooklyn, NY Status: offline
okey so, its been long since I thought of the AC. however, I got it runing. after some fabrication on the compresor. couse the fiting of the AC low side was not a quick connector, and I scred up the threat. any way I fabricated and now its a quick connector.
I charger it with 2 ounces of oil and should be 15 ounces of freon. all thoughs leaks previously. DO not try to put quick conector onto old style connector couse it will just couse leaks. so I added 56 grams of oil, and 400 grams of freon total of 456 grams. and empty space should be another 250 grams.
My quastion is How much oil should I add to the system? my AC clutch does ingage and it does make cold out of AC wents however its not cold as it used to be.
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A/C question - 
