Is there a difference of performance between r12 and r22?

R12 was once used in air conditioning units.It was found to be bad for the environment.R22 is just as damaging.Rules governing changing from the former to the latter are different between countries.The EPA banned R12 and R22 in the United States.Air conditioners and other refrigeration units with R12 can't be changed without a thorough cleaning.

You should get a vacuum pump.The cost of a professional service will be more than the costs of the tools, so a strong pump can be economical.If your conversion doesn't work perfectly, you can always do it again.

Purchase a conversion kit.Some are universal and apply to all vehicles, while others are made for GM brands.

At a time, pour the alcohol into the lines.Use the blowgun to blow air through the lines.The contents are pushed out of the line at the compressor end.The bucket can be used to catch the contents.

After the air conditioner is flushed, install the new drier and expansion.

Use a UV light to investigate for leaks and check the entire system for any traces of UV dye.Ipsen alcohol can be used to clean stains.

Attach a vacuum to the system by hooking up the manifolds.Shut the gauge, close the ball valve and turn off the pump after a vacuum is established.Everything should sit for 15 minutes.If the vacuum has not held, open the valve.If you want to repeat the 15 minute wait, close the gauge and let it sit for another 45 minutes.There are no leaks if the vacuum is maintained on both occasions.