Hi,

My 82 300CD had perfect AC. Never needed to top up or do anything. Unfortunately the car has sat for ~1.5 years, so something must have dried out and allowed R12 to weep out.

I intend to do a proper investigation and find the faulty part, but in the meantime with a depressurized system, what should I consider replacing DIY?

I figured the two schrader valves and the orifice tube at minimum.

Of course the receiver/dryer will be replaced when the system is finally put back together.

I will be running R12, nothing else. This isnt a bozo request of help me fix my system. Im aware of the steps to repair it right, and Ill be sparing no expense at my shop of choice. But if there are some things I can do to be proactive on a 30yo car, I should.

Besides whatever o-rings I can access, and the orifice/valve inserts, should I replace anything else? If Im staying with R12, does it make sense to upgrade the condenser anyway?

Thanks!

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)