I am trying to get the A/C repaired on my 69 427. I have owned the car for 16 years and the A/C lines were missing on it when I purchased it. I have replaced everything except the evaporator core and the POA or suction valve. I can't locate a new one any where and the A/C machanic says I need an updated one for 134a freon. He said they found one for an Impala he repaired some time back. Zip Products offers a kit to upate the valve. I prefer to buy a complete updated valve. Can anyone give me some tips on this??
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Re: 1969 A/C POA valve
Larry------
The evaporator core is still available from GM or Delco dealers under GM #3020037 or Delco #15-6188.
The POA valve is another matter. Originally, it was GM #5910593. That valve was discontinued in April, 1987 and replaced by GM #6551430 aka Delco 15-5193. Unfortunately, that valve was discontinued without supercession in June, 2000. However, you might find one of these from an AC-Delco dealer. It will NOT be a converted valve, though, and you'll be lucky just to find one, at all.
Otherwise, for a POA valve, especially an R-134a converted valve, I'd recommend contacting an A/C specialist like Old Air Products or Vintage Air. I'm sure that you can search out contact info on the internet.In Appreciation of John Hinckley -
Re: 1969 A/C POA valve
Joe, thanks for the response, I wasn't planning on replacing the evaporator core. I found the valve you mentioned at the old air website. One question though, the new Old Air valve has an electrical connection. My original does not. What gives??Comment
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Re: 1969 A/C POA valve
Larry-----
I'm afraid I don't know. However, I expect that the valve available may be a functional replacement and may be used for other applications which do require the electrical connection (perhaps, for a sensor). It would then be unused for your application.
Also, Dr. Rebuild may still have some of the replacement style Delco POA valves for 67-74 applications.In Appreciation of John HinckleyComment
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Re: 1969 A/C POA valve
Joe,
FYI the electrical connection is to be wired into the compressor. It is a low pressure cycling switch. Instructions included. The NORS valve you mention is $325 opposed to $89 for this one. The A/C guy I use said he could not get the systems he has worked on, to work on 134a with the original valve. He had to use the upgrade valve. Thanks for your help!! LarryComment
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Re: 1969 A/C POA valve
Larry, I have converted several 69-72's to R-134 with good results. I think that one of the keys is that I always replace the condenser on the older cars. It seems like that the condenser is a repository for all the junk in the system and becomes semi plugged. The last one that I did will pull 38 deg going down the highway in 90+ deg. and 90+ % humidity.Dick WhittingtonComment
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