Troubleshooting help needed-AC pressures
JUST HOW BAD IT CAN GET and still work!!!
My 70RR came with no AC (440-6 car). The owner, a friend of mine, who was still kickin last I knew, added aftermarket "hang on knee knocker" aftermarket AC. When I swapped the 340 into the car, it took me awhile to realize that it was not difficult to adapt the pump to the small block.
I had bagged and taped up all connections. I did not even change the dryer. I just "red neck" baked the existing receiver dryer in a low temp oven for about half a day to drive out moisture.
When I charged the re-installed system now on the 340, I had a "mere barely basic" knowledge of AC. This was about ?1973? or so. I had no vacuum pump, but R12 was cheap. I installed the system, "swept" the system with a can of R12, and then "rigged" the thing to evacuate BY USING ENGINE VACUUM!!!! After evacuation, I re-swept the system with another can of R12, then re-evacuated using engine vacuum, and finally charged the system. That system functioned just fine--with about 1/2 can loss per year---until I sold the car about ?? 1979 ?? or so. The system used CLAMP ON hoses!!!
This poor faded (slide) photo was 73-74 VERY hot summers back then!!
JUST HOW BAD IT CAN GET and still work!!!
My 70RR came with no AC (440-6 car). The owner, a friend of mine, who was still kickin last I knew, added aftermarket "hang on knee knocker" aftermarket AC. When I swapped the 340 into the car, it took me awhile to realize that it was not difficult to adapt the pump to the small block.
I had bagged and taped up all connections. I did not even change the dryer. I just "red neck" baked the existing receiver dryer in a low temp oven for about half a day to drive out moisture.
When I charged the re-installed system now on the 340, I had a "mere barely basic" knowledge of AC. This was about ?1973? or so. I had no vacuum pump, but R12 was cheap. I installed the system, "swept" the system with a can of R12, and then "rigged" the thing to evacuate BY USING ENGINE VACUUM!!!! After evacuation, I re-swept the system with another can of R12, then re-evacuated using engine vacuum, and finally charged the system. That system functioned just fine--with about 1/2 can loss per year---until I sold the car about ?? 1979 ?? or so. The system used CLAMP ON hoses!!!
This poor faded (slide) photo was 73-74 VERY hot summers back then!!
