what is the cause of a vibrating air condition liquid line in an automobile?

Question

ive just install a new compressor and the liquid line is vibrating

Answer 1

When you replaced the a/c compressor did you flush out the old debris left in the system from the old compressor taking a dump? Did you replace the orifice or the expansion valve? They also get clogged from the old comp. debris. Did you add refrigeration oil to the compressor upon installation? Some are sold with no oil inside. After recovering the R-12 or 134-A, Did you vacuum down the system for at least 15 to 30 minutes? You have to create a vacuum in the system to pull in the new freon and to get all the air out. Then your ready to recharge the systemand if all your lines are secured properly you shouldn't get any vibration unless the compressor is defective. good luck. a/c tech for 16 years.

Answer 2

It's most likely that your new compressor has a stuck reed valve. Just because it's NEW, remanufactured, doesn't mean that there is nothing wrong with it.

Of course you know that you must evacuate the system, so NO there better not be any air in it.
The A/C systems that last the longest are the ones that got evacuated for more than 1 hour.

If anyone tells you that it is OK to have air bubbles in an AC system they are full of crap, and should be beaten and battered.

atmospheric air and freon combine under pressure to form hydrochloric acid.

besides that air takes up space and prevents enough freon from fitting, reducing the efficiency

Answer 3

its bouncing on something did you put the hold down clamps back on ? They all shack some but not out of control. it may need to be charged more too

Answer 4

Line support are loose, tighten it. Or, there's a bubble along the line.

Answer 5

Air bubbles.
It might go away.