'91 AC.....
- Thread starter WarWagon
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No expert
I'm no expert but if the compressor is working, I think you can just swap out the high pressure fitting to accept R134 refrigerant in place of the Freon. I see kits at AutoZone for about $30. The previous owner of my vehicle must have don't it because its a stock compressor that has the R134 nipples on it. Mine blows nice and cold in the summer.
I think that might be an option for you to rehab your AC for a lot less money. Good luck!
I'm no expert but if the compressor is working, I think you can just swap out the high pressure fitting to accept R134 refrigerant in place of the Freon. I see kits at AutoZone for about $30. The previous owner of my vehicle must have don't it because its a stock compressor that has the R134 nipples on it. Mine blows nice and cold in the summer.
I think that might be an option for you to rehab your AC for a lot less money. Good luck!
- Thread starter
- #3
Sounds great....and my AC actually blows pretty cold now, just wondered about the swap out because it seems it's going to be needed sooner or later. My heat doesn't blow very hot though.....
I say mine but it's actually a rig I'm thinking about buying today!
I say mine but it's actually a rig I'm thinking about buying today!
X2 just nipples works for me. My wife and I play freeze out in the summer.
High side and low side retro fittings from R12 to R134a is all you need. The low side thread is smaller than the high. I would recommend getting a 90 degree low side fitting. Remember to remove the old schraeder valves when you put on the new fittings.
Pull a vacuum and charge it 80% of what was recommended for R12. Never charge on the high side and don't charge as a liquid (can upside down) as your low side is on the compressor and compressors don't like compressing a liquid.
Pull a vacuum and charge it 80% of what was recommended for R12. Never charge on the high side and don't charge as a liquid (can upside down) as your low side is on the compressor and compressors don't like compressing a liquid.
Hi, I'd leave it be and add R-12 as needed. Mike
I agree to leave it until it needs a recharge, then retro. On the heat, take the heater hoses loose and blow them out with a water hose, alternating the direction periodically. If you disconnect the hoses at the right location, you will clean out both heater cores. I've had some nasty stuff come out of both of my 91's then the heat worked. May want to check the thermostat too. I have had one fall apart inside the housing, it was in 3 pieces!
If your AC is not as cold as it once was see if Recall SSC #P01 has been done. If not
the A/C Expansion Valve will be replaced and your system will be recharged all on MrT's dime.
the A/C Expansion Valve will be replaced and your system will be recharged all on MrT's dime.
You can retro fit them easily. I bought a kit from the States (have a look where I live ) because retro fit parts are almost impossible to get here, and R12 is banned as well, so R134A it is, BUT you must add 3 oz of PAG oil into your system ( I bought a kit that had it), TRUST me, it works well. I have worked on car A/C' for 30 years now !!!
Check your rear heat as well. If your not getting good flow, you won't have good rear heat. Could be that your system is clogged up. Good flushing would help for sure.