If I remember correctly there is a shear pin of some kind on the compressor pulley to keep it from blowing the belt of the compressor seizes. If the pulley spins freely it's because the compressor was taking too much force to spin and it sheared the pin. At least that was my understanding.
These are bad for PCV system failure. For some reason coolant is routed through the PCV valve, and is made of plastic. The unit can crack and allow coolant into the oil. You gotta fix it immediately or it'll get ugly fast!
Given that the system is empty after you replace the compressor, AND the fact that the compressor always runs, I have to assume it's bad to run without a charge as there is insufficient lubrication for the compressor?
If I remember correctly there is a shear pin of some kind on the compressor pulley to keep it from blowing the belt of the compressor seizes. If the pulley spins freely it's because the compressor was taking too much force to spin and it sheared the pin. At least that was my understanding.
True
Good observation on the A/C compressor center shaft. I was able to diagnose my issue, cheers
What year is your a4? Did you have to get the climate control module programmed?
These are bad for PCV system failure. For some reason coolant is routed through the PCV valve, and is made of plastic. The unit can crack and allow coolant into the oil. You gotta fix it immediately or it'll get ugly fast!
Also make sure your doing the cam followers on a regular basis
Oil pressure issues on these cars is due to the blance shafts inside the oil pump most of the time
Given that the system is empty after you replace the compressor, AND the fact that the compressor always runs, I have to assume it's bad to run without a charge as there is insufficient lubrication for the compressor?
Compressor still use 150g of PAG oil different from the ac system