My AC stopped working and I have been trying to fix it, but I am facing multiple issues and need some help. The pressure in the system is too high and the system cycles on and off frequently.
Here is the background:
The A/C worked in the past but there was some leakage. When I took to an AC shop they identified that there was some leakage through the compressor. I decided to do a major overhaul in the system and I followed the A/C conversion thread from the DYI portion of the forum.
This is what I've done:
I have sent the Nipodenso Compressor to be rebuilt by Polar Bear in Ft Lauderdale. They have good reviews from different forums/threads. They told me the compressor failed likely due to a combination of contaminated oil and temperature. Before reassembly back in the car, I followed their instructions to drain the Oil they used for testing and replaced with new Oil as per specs (8 oz of PAG 46)
I have replaced the Condenser by the Nissens Parallel Flow.
I have replaced the Drier from the previous configuration of 2 Pressure Switches to 1 High Pressure Switch (with a replaced new switch) following the BMW document.
I have replaced the Expansion Valve.
I have NOT replaced the Fan, nor the Evaporator.
I flushed the lines and the evaporator using a AC cleaner spray can.
The problem:
After putting the car back together, I took it to the AC Shop again and they charged it and checked for leaks. There was a small leak at one of the lines that go to the Drier, they replaced the seal and that was solved.
HOWEVER, after they charged and tested it, the pressure was really high and the system was cycling on and off continuously. I don't have the pressure value but I think (?) they said something like 300 (whatever unit?) and it should be in the high 100's/low 200's.
They showed me that the AC Fan Shroud is missing. Based on all things I've been fixing in this car, I wouldn't doubt it that the PO removed at some point.
They think the old AC Fan (that I have not replaced and is a genuine BMW part, although pretty old, maybe original) was not helping much and suggested I replace it. I am not sure that makes sense, but I might do it, as well.
When I flushed the Evaporator, I did not blow pressurized air there so I wouldn't make a mess inside the car. Instead I left it open to let the flushing /cleaning fluid evaporate. I suspect it might have not evaporated entirely.
Questions:
Can anyone confirm there should be a Fan Shroud in the front? I checked Real OEM and it shows item 2 that I do not have on my car, but I have items 4 and 5. Should I have all three? I don't have items 3 and 6 either. What should I have there?
Could the remaining flushing fluid in the Evaporator be causing too much pressure in the system?
The Condenser is really hot due to the pressure.
Here is the background:
The A/C worked in the past but there was some leakage. When I took to an AC shop they identified that there was some leakage through the compressor. I decided to do a major overhaul in the system and I followed the A/C conversion thread from the DYI portion of the forum.
This is what I've done:
I have sent the Nipodenso Compressor to be rebuilt by Polar Bear in Ft Lauderdale. They have good reviews from different forums/threads. They told me the compressor failed likely due to a combination of contaminated oil and temperature. Before reassembly back in the car, I followed their instructions to drain the Oil they used for testing and replaced with new Oil as per specs (8 oz of PAG 46)
I have replaced the Condenser by the Nissens Parallel Flow.
I have replaced the Drier from the previous configuration of 2 Pressure Switches to 1 High Pressure Switch (with a replaced new switch) following the BMW document.
I have replaced the Expansion Valve.
I have NOT replaced the Fan, nor the Evaporator.
I flushed the lines and the evaporator using a AC cleaner spray can.
The problem:
After putting the car back together, I took it to the AC Shop again and they charged it and checked for leaks. There was a small leak at one of the lines that go to the Drier, they replaced the seal and that was solved.
HOWEVER, after they charged and tested it, the pressure was really high and the system was cycling on and off continuously. I don't have the pressure value but I think (?) they said something like 300 (whatever unit?) and it should be in the high 100's/low 200's.
They showed me that the AC Fan Shroud is missing. Based on all things I've been fixing in this car, I wouldn't doubt it that the PO removed at some point.
They think the old AC Fan (that I have not replaced and is a genuine BMW part, although pretty old, maybe original) was not helping much and suggested I replace it. I am not sure that makes sense, but I might do it, as well.
When I flushed the Evaporator, I did not blow pressurized air there so I wouldn't make a mess inside the car. Instead I left it open to let the flushing /cleaning fluid evaporate. I suspect it might have not evaporated entirely.
Questions:
Can anyone confirm there should be a Fan Shroud in the front? I checked Real OEM and it shows item 2 that I do not have on my car, but I have items 4 and 5. Should I have all three? I don't have items 3 and 6 either. What should I have there?
Could the remaining flushing fluid in the Evaporator be causing too much pressure in the system?
The Condenser is really hot due to the pressure.
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