Does anyone have a pic of the correct placement of the brackets that secure the POA valve on a 69? Jim had one that was close, but needed to be shot a little bit further to the left.

I have the brackets and the POA has been redone, but now that I am returning the AC to stock config I don't know how the original was attached.

Big block or small block? b/b is on inside piece, s/b is on the outside piece. I don't have pics of either, just clarifying.

This probably wont help, but here is my 68 with the poa retrofit kit

http://i173.photobucket.com/albums/w67/dale68z/Img0093.jpg

dale

http://i45.photobucket.com/albums/f58/markx22/silver%20RS/th_DSC00323.jpg (http://s45.photobucket.com/albums/f58/markx22/silver%20RS/?action=view&current=DSC00323.jpg)
1969 small block

Thanks guys BOTH are a big help. Exactly what I was looking for. I've got the POA retrofit too, but my A/C guy didn't use the brackets. I have them and I had my original POA rebuilt and am going to put it back the way it was. The constant cycling on and off has (I think) caused two compressors to start throwing oil out the front seal. So I am going to go back and try it the other way for a while, and then get my original compressor redone too...maybe.

most compressors of the day are ceramic shaft seal compressors and use the the compressor oil to lubercate the seal and the ring of oil on your motor and hood is normal to a certian extent. my system was rebuilt 10 years ago and it spews around the compressor but still holds the r12 charge that was put in all that time ago heres a little info on it http://www.autoacforum.com/messageview.cfm?catid=20&threadid=8294

something else . ac systems with an expansion valve should NOT cycle. fix orifice systems will cycle to adjust evap pressure as opposed to the expansion valve opening and closing to adjust pressure. please don't use hose clamps to attach the rubber hoses of your system . use ac crimp fitting , the environment thanks you. know they used them back in the 60s but technology has advanced since then and i hope we have too. with the high side or liquid line running about 200 psi on a hot day you would have to be kidding yourself to think that a hose clamp is going to hold that back without leaking

Pilot Operated Absolute (POA) Valve




Like the suction valve, the POA valve is a suction throttling device that is located at the outlet of the A/C evaporator and is used to control the amount of compressor suction on the evaporator.

The POA valve was used on some General Motors and Ford air conditioning systems through the 1970’s. On these A/C systems,{the compressor would run constantly whenever the A/C system was on}. Under certain operating conditions, less compressor suction was required on the evaporator. The POA valve would then close off the flow of refrigerant, effectively reducing the amount of compressor suction.

Thanks guys all great info. Compressors were leaving a ring of oil all the way around the engine compartment, also being blown about by the fan and dripping from my new hood insulation. I didn't like that much. This current compressor has not yet done that, but then again I didn't use it much before I parked it "for a short while." Eventually I'm going to have the guy who restored my original POA restore my original compressor with the double lip seals, if the can do that. I'll use this A6 replacement as a guinea pig. Thanks again.

Ahhhh, POA valves.:) Also known as Suction Control Valves. I run two of them on my sailboat. But unlike single evaporator systems with TXV's, my compressor is set to run full time. The POA' are on the AC and Refer plates. The freeze evaperator has no valve. Suction low end values are controlled with a timer (up to one hour). The AC is controlled by a air-stream thermostat.
I'm not saying what's right or wrong because I built it myself. And NO, I would never do it again!:noway:
What's that? This is a TC site, not a boat site? Relax, the AC evaporator on the boat is from my son's first 69 Camaro. Perfect fit in my boat.:D