Hydrolock - Why Doesn't PAG Oil Cause It

[peanutaxis]

Hi,

I believe that an AC pump is usually located lowest or as low as possible. I was told that this was so that the AC oil would pool there, particularly when the system isn't running. But I have always wondered why the oil doesn't hydrolock the pump? I've heard stories of too much refrigerant in a system hydrolocking the pump, so why doesn't oil do it?


Thanks,
p

[Cusser]

I believe that an AC pump is usually located lowest or as low as possible. I was told that this was so that the AC oil would pool

For the vehicles we have owned over the years, I cannot confirm that compressors are usually located as low as possible, and we currently have four with factory AC (1988-2014).

We did have a 2005 GMC Yukon which did have a very low-mounted compressor, and that one did developing what was termed slugging, and I had to replace the compressor. Do a Search on slugging, and there even is an electronic module available to help prevent it, called "Deslugger".

Here, if the administrator allows this link:
https://www.google.com/search?q=deslugg ... nt=gws-wiz

[Cusser]

I believe that an AC pump is usually located lowest or as low as possible. I was told that this was so that the AC oil would pool

For the vehicles we have owned over the years, I cannot confirm that compressors are usually located as low as possible, and we currently have four with factory AC (1988-2014).

We did have a 2005 GMC Yukon which did have a very low-mounted compressor, and that one did developing what was termed slugging, and I had to replace the compressor. Do a Search on slugging or deslugger, and there even is an electronic module available to help prevent it, called "Deslugger".

Here, if the administrator allows this link:
https://www.google.com/search?q=deslugg ... nt=gws-wiz