Hello, This is Neb again. The guy with the 92 Ram Van with the 360. Another question: When we bought the van about 4 years ago, the air conditioning blew cold for a very short while and a bit hit & miss. Now it just blows warm air. Do you guys think maybe it just needs a fill-up of freon? Or should I look for something else to see if anything is wrong? Also, what does the air cond. take on this year? R-12 or R-134? Thank you!!
Neb.

 

95 was the year that freon changed from r12 to r134. Global warming issue. There are kits for converting to r134a but any old freon must by law be recovered. It is a pro job.They actually vacumn the old stuff out which inturn puts all of yourac vacumn hoses under pressure so if they are leaking you'll replace those too.Part of the conversion s a different size tube/valve/oraface thingie so slaping the new stuff in just will not work.

 

You can have the old R-12 removed by a pro shop, then if you are up for the challange you can take the compressor off and drain the old oil. IF you have an air compressor you then can run a AC Flush through the condensor and evaporator and hoses. After the compressor is drained refill with the proper oil for the R134-a freon, the old oil from R-12 will NOT work. Then change the seals, accumalator-dryer, reconnect all parts including the compressor and rent from your local automotive parts store the gages, vacuum pump and buy the needed freon, I always go with the Artic Freeze version for it has sealers and conditioners plus an additive that helps it to get colder faster. Hook up the gages and vacuum the system down to as close to -30inches as you can and keep the pump running for about 1 hour. Shut the line and pump off and wait about 15-30 minutes and see if the vacuum holds, if so then add the freon, if not then double check your connnections. If still not holding pressure then you will need to find which other part has a leak and replace that part.