Guest 53 Roady Posted March 27, 2014 Share Posted March 27, 2014 (edited) I am planning a modern AC install on my 57. Do I want the AC water pump? What is the difference and do they interchange?Thanks, Pat Edited March 27, 2014 by 53 Roady (see edit history) Link to comment Share on other sites More sharing options...
Oldsfan Posted March 27, 2014 Share Posted March 27, 2014 I think the main difference is the length of the shaft, because of having to allow room for the additional pulley grooves for the a/c belts.Paul Link to comment Share on other sites More sharing options...
Guest 53 Roady Posted March 28, 2014 Share Posted March 28, 2014 Thanks PaulI was planning to run the AC compressor on the alternator belt both with homemade brackets to the right side of the engine. Is this likely to work out? The other belt would continue as oem to do the power steering. Link to comment Share on other sites More sharing options...
Oldsfan Posted March 31, 2014 Share Posted March 31, 2014 That is probably how the factory a/c was run, except I believe they used a pair of belts instead of just one.Paul Link to comment Share on other sites More sharing options...
Guest 53 Roady Posted April 1, 2014 Share Posted April 1, 2014 I think Olds ran double belts but Buick 1 belt. My car had an add on AC when I got it and a cobbled on 3rd pulley. I am wondering whether the modern compressors need the beefed up drive. If they do I will seek a factory AC pump and pulley setup before I start making my mounting brackets. My water pump is bad now and I am trying to look ahead.Pat Link to comment Share on other sites More sharing options...
John Posted April 1, 2014 Share Posted April 1, 2014 In Buicks the water pumps on AC equipped cars sometimes had different impellers: 5 vanes for AC, 3 vanes without. Link to comment Share on other sites More sharing options...
dlh61olds Posted April 2, 2014 Share Posted April 2, 2014 The only difference is the A/C pump has a larger bearing.Either pump will fit and work.Good Luck, Dave Link to comment Share on other sites More sharing options...
Guest 53 Roady Posted April 3, 2014 Share Posted April 3, 2014 Thanks guys. My harmonic balancer has 2 grooves. There is then a third groove in the form of a pulley mounted on the front of the balancer. (My car used to have an add on ac which I removed 25 years ago but I think they drove the ac off the add on pulley) I could use the back 2 grooves for the ac and the front for the alternator. But my power steering pump currently runs off the rear groove. It is the factory bracket setup and works so well I hate to change it. Have you done or seen any Vintage Air or other updates on Olds?Pat Link to comment Share on other sites More sharing options...
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