Edit above...I bought all the orings in the rotary vac pump at the dealer, but the bushings in the engine are NLA to be more specific.
Wow I don't recall seeing your reply 'til now
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So I got the oil pump I linked to earlier and it does indeed have 36mm gears. But (with a garbage sunpro gauge) I only have 10psi at idle and about 43psi at 3000 rpm. That's with the oil mostly hot, the car isn't registered/insured so I haven't really driven it, just up and down the road.
As for that seal it the vac pump, that might be the problem with my rabbit. Lately it's been taking sometimes 3 seconds for the light to go out.
I'd like to get some bushings made for the oil pump shaft too. Anyone know for sure if they'd be the same between gas and diesels? I have a removed 1.6 gasser I could measure.
Alaska.. I was gonna consider thicker oil... lol
Maybe a 0w50 synthetic?
I think I found the cause.......my lifters are way loose in there bores, I don't have an engine to compare but I assume they should have very very little to no side movement. Mine wobble enoug to squish the oil out from around 'em. Very depressing since I just put new valves, guides and ground the valve seats and did a minor port job on it. All rather time consuming endeavors..........