I finally had my Indy check the AC on the 300D 2.5t. It still has the old R-12 system. He will black light the dye to check for leaks as it is low in sight glass. He suggested finding some R-12 as cheaper and better long term than doing a 134a conversion unless there are major leaks.
I agree. Scraping up a can or two every couple of years will be far less expensive than a formal conversion, at least until it leaks badly. Most of our cars that had R12 finally just leaked down enough to stop working, all I do on them is top them off with secret sauce. Broken ones required more work, and of course who wants to risk expensive refrigerant on an unknown quantity? Even R134a is not so cheap anymore. So for there the secret sauce works well too. -- Jim
