AC Percolating

[photogod]

Don't know if I spelled that right... I had my 60's ac recharged a while ago and noticed that it percolates when i turn the motor off. The cold hose gergles and you can feel it rumbling. At first I thought it was the radiator but I opened the hood and felt the hose and I could feel the vibration. I looked into that little window and saw that the freon was bubbling for a bit. After a minute or so it stops. The ac blows very cold and the shop found no leaks so I feel like I shouldn't worry about it but that goes against my nature.... Any Ideas? Thanks.

 

[Clack]

Not sure what the problem is, but I just had my AC fixed and now I have cold air for the first time ever. I feel so pampered.

 

[swank60]

I wonder if there's bubbles, or weird oil or something in there that would be causing a reaction?

Have you called the shop?

 

[Civil1]

Don't think I can help, but was curious if you had R12 freon or have you had it converted to R134?

 

[hj60]

"Percolating" is fairly normal in some systems. The refrigerant is equalizing pressure between
the high and low sides.
With the engine running at a high idle and the AC on max/high, check the sightglass.
If there are no, or very few tiny, bubbles, it's fully charged and working properly.

 

[photogod]

Checked the glass and all is well. Thanks for the advice nice to have air in Sept in MN. The air is cool but the sun is hot. ( No I didn't calll the shop yet and I'm running the original system with no conversion. Sorry I wasn't clearer on this subject.)