Engine Size: 327
Refrigerant Type: 134a
Ambient Temp: N/A
Pressure Low: N/A
Pressure High: N/A
Country of Origin: United States
I'm in the process of restoring my Factory AC 65 Corvette and have come to the crossroad of the AC system. I pulled the complete system out a few days ago and started on my parts list. The Suction Throttling Valve has been long been removed and replaced with a POA valve.
I looked into the POA valve today and its rusty and very dirty but I still plan on bench testing it tomorrow. Also, when I look into the AC and Evaporator lines they are brown. Will flushing clean this up?
I'm trying to salvage the major components but at this point I'm not sure. Any tips as I move forward?
You will want a new receiver/drier, and flushing the components (exc. compressor, tvx and stv) would be advised. I would suspect your hoses will need replaced too, the site sponsor can help you with this also. I would definitely install a new GM double lip seal ACD# 15-30948, GM# 2724954 in your compressor, if you want to reuse it. While it is not officially recommended for the A6, GM tech says he has used them, and I have personally put one in a '78 ceramic seal A6 with excellent results, as well as numerous R4s.
A lot will depend on what your plans are for this vehicle.
If you want to make this a 100 point car for the shows, an original STV needs to be installed and R-12 refrigerant used. Granted, the POA is superior to the STV, but it ain't original. If you plan on retrofitting to R-134a, the STV is easier to adjust than the POA... just loosen the locknut and rotate the diaphragm.
If they're not leaking, you can keep the condenser, evaporator, and TXV (if functional). Note that if you retrofit to R-134a, you'll need a higher capacity (parallel flow) condenser. All the rubber has to go, as does the receiver dryer. You want a receiver with fresh dessicant, preferably XH7, whether that means rebuilding the existing or NOS unit, or replacing it altogether with a correct reproduction... but again, it all depends on what your plans are for this vehicle.
Could try contacting Jay Leno, wow, does that guy have a restoration shop, if he can't find it, gets the prints from the OE and has his crew make it. When I wanted a Shepherd like Jerry Lee in the movie K-9, family thought I was nuts when I called the movie studio to find out who the breeder was, they were very nice and extremely helpful and helped me to find the breeder. Just saying, you don't know until you try. Ha, they have got to maintain their public image.
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