And an apology to tangofox007 for ever doubting that I had an oil check valve. First thing that happened when I took the pump off was the little spring fell out, then I found the other piece lodged against the intake diaphragm. Right on the money with that one though I'm still mystified by how the thing was installed in the first place. I'm not sure I could have fished it out without removing the pump and I had the kit anyway so a good excuse for a rebuild. The reason I'm bumping this to the front, I hope, is that I took a few good pictures along the way and will post them if anyone is interested. Yes, no, maybe? Probably they are better than the ones on the DIY link.

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1983 CD
1958 Studebaker Packard (being resuscitated)