This evening, I installed the remaining air conditioning components so I can get the system checked and filled later this week. This included installing the manifolds on the top of the new compressor, the accumulator and associated line, accumulator bracket, pressure switch, line from the firewall to condenser, and the line from the condenser to the compressor.
The compressor had a label on the top indicating that it came pre-oiled with 3 ounces of PAG-46. The label suggested checking target oil quantities for your vehicle which I did to find the entire system needs 7-8 ounces of PAG-46. From my research, I found the system originally used mineral oil and that since I didn't replace the evaporator, it would still be in the system. I don't need to remove it but consider it likely has 1.5 ounces of mineral oil which will contribute to the total 7-8 ounces.
Since I have 3 ounces in the compressor and 1.5 ounces in the evaporator so I need to add 3 ounces. I did that by adding 3/4 ounce in each of the lines when they were put on the car with 3/4 of an ounce in the accumulator. Unfortunately, I didn't consider adding oil to the condenser before installing it so I'll just need to hope it all disperses fairly well later. The oil was a pain as it didn't pour well and I was constantly having it drip from lines making a bit of a mess. However, I got the job done.
I was really particular with the o-rings on all the parts to ensure they were in good shape and coated with the PAG-46 oil. I went around the connections a few times just to make sure everything was sealed properly. Once that is done, I put the three clips on the press together connectors for some added insurance.
As I went over it all one last time, I realized I didn't have a high side quick connect installed for 134A. The line has a port for R12 but there is no 134A adapter on the line. I found that an AutoZone just two miles from home has the part I need so I'll pick it up after work tomorrow. I then just need to put it on and take it somewhere to have the system checked and charged.
Update 04/23/26 - I had the a/c charged today at a local shop. They added some dye when filling it just in case I develop a leak but the system is well sealed. Additionally, they said it cools incredibly well as they had it blowing 32 degrees from the vents during their testing. That is excellent news and driving it home was quite nice.
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