PeachParts Mercedes-Benz Forum - View Single Post - Copper Washers vs. O-rings in the 116

vstech · #2 09-04-2010, 10:33 AM

First off, R12a or FREEZE 12 is NOT a drop in replacement for 12. it's a blend refrigerant of 134a and other chemicals to get better cooling than 134 can in r12 systems. it's one of the "junk" refrigerants. it requires replacement of the oil from the 12 system with ester, or pag oil, and it should have special fittings that are different from 134 fittings, and it requires proper warning labels denoting that it is in there! to prevent an unsuspecting service company from ruining their recovery bottles during service in the future.

next, to your question.
the lines with copper should have new copper crush washers replaced. they are one time use. they will probably work fine if you reuse them, but I'd put in new.