Replacing A/C compressor in car already retrofitted to R134a?
#1
Replacing A/C compressor in car already retrofitted to R134a?
I have a 1992 formula that was converted to R134a before I bought it. A/C ran great and cold. However, the compressor took a dump about 2 weeks ago. You could feel the vibration when it engaged in the seats.
Now I have another compressor from a 1991 formula (my race car) that I recently took out and was in good shape, but was using R-12.
What do I need to do (if anything) to replace the bad compressor in my r134a system with a compressor that came from an R-12 system?
Now I have another compressor from a 1991 formula (my race car) that I recently took out and was in good shape, but was using R-12.
What do I need to do (if anything) to replace the bad compressor in my r134a system with a compressor that came from an R-12 system?
#2
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The usual: Remove the drier & orifice tube; flush the entire system; replace the drier & orifice tube with new ones; evacuate, oil, and charge.
#4
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
It's normal practice to replace the drier.
Use an oil that is compatible with both the R12 oil and R134a oil. Otherwise, no other issues.
If the original conversion was done properly, the o-rings should have been replaced with green ones (forget the material off the top of my head, but I can get that for you if you need it).
Use an oil that is compatible with both the R12 oil and R134a oil. Otherwise, no other issues.
If the original conversion was done properly, the o-rings should have been replaced with green ones (forget the material off the top of my head, but I can get that for you if you need it).
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Car: 1992 Firebird base
Engine: 305 TBI
Transmission: 700r4 / 4l60
Axle/Gears: stock
Re: Replacing A/C compressor in car already retrofitted to R134a?
It's normal practice to replace the drier.
Use an oil that is compatible with both the R12 oil and R134a oil. Otherwise, no other issues.
If the original conversion was done properly, the o-rings should have been replaced with green ones (forget the material off the top of my head, but I can get that for you if you need it).
Use an oil that is compatible with both the R12 oil and R134a oil. Otherwise, no other issues.
If the original conversion was done properly, the o-rings should have been replaced with green ones (forget the material off the top of my head, but I can get that for you if you need it).
#6
Supreme Member
Re: Replacing A/C compressor in car already retrofitted to R134a?
Pretty sure it's PAG 150 oil for that setup now. If the old compressor got chewed up some inside the system probably does need cleaned, new drier and exp. tube, and a good evacuation (vacuum) before recharging.
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Car: 1992 Firebird base
Engine: 305 TBI
Transmission: 700r4 / 4l60
Axle/Gears: stock
Re: Replacing A/C compressor in car already retrofitted to R134a?
Next question, should I perform a flush of the system, different from a vacuum, to get out all the old oil?
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#8
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Car: 89' Firebird / 87' Formula
Engine: 3.4 / 5.0
Transmission: 700-R4
Axle/Gears: 3.42 / 3.42
Re: Replacing A/C compressor in car already retrofitted to R134a?
that's up to you. You should if your old compressor gernaded and sent stuff through the system.. check the orifice tube for shavings in it.
Some or a lot of manufacturers require a flush..i believe rockauto will require proof of purchase of a flush kit if you need to warranty a compressor.
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