Hey guys a relative if mine said they willl vacuum out my entire ac unit so I can do a proper recharge. I know I prolly need some stop leak just in case, but how much do I need? Also how much freon should I buy?

 

never heard of stop leak for the a/c. it is best to have your a/c checked with a proper a/c machine to make sure the oil to refigerant ratio is correct. far as i know freon is not used anymore. you will want to make sure your using the correct refigerant (r134a) for your system. https://camaroforums.com/forum/v6-te...recharge-4721/

 

As Craby said, it is best to take it to someone who knows how to work on A/C and has the proper tools. Simply vacuuming out what is in there and replacing the refrigerant is not going to solve your leak problem.

It would be best to have it recharged and some dye added to the oil. You can then run it for a week or so and check for the leak with a UV lamp. The dye they put in the oil glows under UV light.

If you do have a leak, you will probably need to replace the drier after you fix the leak.

 

My guess is he opened the system up for some reason now he is recharging it. The stop leak you are referring cause the oil ring seals to swell slightly. It can work or it can cause more leaks. Don't put in stop leak unless you have a leak and your planning on selling the car.

If you drained the freon (yes R12, R22, R 95 and R134a are all types of freon) through the valve at the normal rate you would have little oil loss and should not need to replace any. I can not answer your question about how much Freon you need but all auto manufatures put a charge sticker in the engine comparment that should have the Freon type and amount. It should be 2-3 lbs.

If I am not right about the reason for recharged post back. If you replaced any items or your system was opened at a line you may need oil.