[jlw]

@JBSPEED86,


Don't remove your A/C, converting to R134A is quite easy(provided you have the proper tools). If your current A/C unit runs on R12 which uses mineral oil, reclaim the refrigerant from the system and drain the oil from the compressor. Install polyol ester (POE) oil which is compatable with R134a (http://www.technicalchemical.com/products-10a.htm (scroll down to POE oil) add the same amount of POE oil that data plate states, vacuum down the system for at least an hour and charge the system with 2lbs of R134a. Done.

You can as a bit of a safety measure replace the filter/dryer.

I did this for my dad on his 86 5.0LX about two years ago and it's still running strong. Also I didn't replace the filter/dryer, based on previous experience in the refrigeration industry you can have up to 5% mineral mixed into the POE oil and you won't have any problems.

 

[jlw]

What would happen if you thought you got it all out but you didnt. What sort of problems are we lookin at?

R134a is not compatable with mineral oil and with eventually turn gummy, however alittle mineral oil in a R134a system wont do any harm, I converted a series of commercial freezers from R12 to R134a and all I changed was the filter/dryer and switch to POE oil. You can also blow the system out with nitrogen before you charge with r134a, it will help remove any moisture in the system.

Have a look here, I buy all my A/C tools from them.
http://www.yellowjacket.com/pr.html

Also dont buy any A/C tools with automotive threads, you just pay more and your tools are then only limited to work on cars.

When buying the A/C coupler (buy the ECONOMY R-134a A/C COUPLERS)
ask for one with the standard refrigeration thread, that way you can buy the standard hoses and std gages which are cheaper and more useful.
http://www.yellowjacket.com/prdetail.cfm?PrimCatID=122&Auto=1#a3040

So the only thing you have to replace on the car is the A/C fitting for the R134a coupler, provided the A/C system is functioning properly and doesn't have any leaks.