Engine Size: 4.7
Refrigerant Type: R134A
Ambient Temp: 90
Pressure Low: 35
Pressure High: 225
Country of Origin: United States
Last weekend I tried to repair the AC in my Moms Durango.
It was blowing cool, the Low side was reading high, so I assumed compressor.
Replaced compressor (4 Seasons reman)
Add 8oz PAG100. (4 in compressor 4 in drier)
Vacuum 90 minutes.
Charged with 48oz 134A (calls for 2.44lb, used 4 cans)
AC is blowing very cool, to sorta cold.
guages are normal, 35 and 225 at about 90.
I read a lot of forum posts, and found a couple that indicated an oil overcharge.
The system calls for 10oz oil, I added 8 as I mentioned before.
I emptied the old compressor, and drier to figure out how much oil was in them, probably should have done this first.
ZERO oil came out of the compressor and drier (actually a few drops)
How can this be?
Before my repair the system had pressure, so I assume it had normal oil.
I added 8 ounces, does this mean there is 18 ounces in my system?
1. Would this cause my problem?
2. If no oil was in the old compressor/drier, where is it?
3. What do I do now?
Thanks in advance, I am puzzled.
If the vehicle was originally in a low charge state; proper oil migration was compromised. The majority of the oil will pool in the evaporator. Looks like you added more oil than oil balancing procedure (to add oil with each component being replaced) calls for, and what about the shipping oil that came in the replacement compressor? Looks like you now need a proper flush.
Was the system not flushed when the new compressor was installed? I know depending on why the compressor was replaced it may not be necessary (leak compared to failure) but all warranties I have seen for compressors require the system to be flushed along with replacement of other parts. If the old oil did not leak out, it is still in the system somewhere. Start with an empty system, that way you know exactly what is in the system.
I bought a can of 134a at w**-mart that had a stop leak, oil, and dye in it. It also had a hose and a gauge, so now I'm an AC pro!
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