Post by Deleted on Dec 13, 2018 6:37:27 GMT -5
These cars have hoses that no longer meet our needs, as they leak refrigerant. The hoses can be repaired by a company called Cold Hose, out of FL. No affiliation. Just recognize the hose parts to be reused should be cleaned before you send out for repair, inside and out. In the photos, I used Argent Silver paint to renew the connections.
The POA valves respond well to the use of R134a. The Web can show how to re-adjust the pressure to better match R134a working pressure. Do know the A6 compressors, are a weak link. The updated compressors are more robust. Also, a new condenser will help reduce working pressures, as the tubes are sized for R134a.
I also installed twin electric fans, 10" dia, in front of the condenser, with a controller to operate off radiator temp or the A/C signal power. These cars always operated hot in summer months, solved with the cross flow, larger radiators, in 1966 and up. (GM did try to fix the problem in 65 with a taller radiator, look at the radiator support. But still could not get enough total radiator fin area. For 66, the frame rails were pused out,in front, to install a much wider radiator.)
Most of the parts can be sourced; condensers, and evaporators. I have not found a replacement for the A/C muffler. A replacement for the 66 cars is available, but the connections will need to reworked for our 65 cars.
The photos below show Cold Hose repairs.
Note I had not installed the mount on the radiator support, as my system would not hold Vacuum, think my evaporator is leaking. I bought a set of hose connections, to be used as plugs (once I seal the ends), so I can test the Evaporator separately. I pressure tested the system with Nitrogen, to 200 PSI, but could not find a leak, in hoses or condenser. I Will update.
The POA valves respond well to the use of R134a. The Web can show how to re-adjust the pressure to better match R134a working pressure. Do know the A6 compressors, are a weak link. The updated compressors are more robust. Also, a new condenser will help reduce working pressures, as the tubes are sized for R134a.
I also installed twin electric fans, 10" dia, in front of the condenser, with a controller to operate off radiator temp or the A/C signal power. These cars always operated hot in summer months, solved with the cross flow, larger radiators, in 1966 and up. (GM did try to fix the problem in 65 with a taller radiator, look at the radiator support. But still could not get enough total radiator fin area. For 66, the frame rails were pused out,in front, to install a much wider radiator.)
Most of the parts can be sourced; condensers, and evaporators. I have not found a replacement for the A/C muffler. A replacement for the 66 cars is available, but the connections will need to reworked for our 65 cars.
The photos below show Cold Hose repairs.
Note I had not installed the mount on the radiator support, as my system would not hold Vacuum, think my evaporator is leaking. I bought a set of hose connections, to be used as plugs (once I seal the ends), so I can test the Evaporator separately. I pressure tested the system with Nitrogen, to 200 PSI, but could not find a leak, in hoses or condenser. I Will update.
