Oil pressure while cranking?

Basic tech questions such as future setups, different turbo kits, car diagnosis, etc
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modulation
Dreams of owning a 240!
Posts: 83
Joined: Fri Jun 12, 2015 4:55 pm

Oil pressure while cranking?

Post by modulation » Sat Sep 12, 2020 1:19 pm

New rebuild ready to start tomorrow. Cranked over today but not for long maybe 20 seconds or so. But saw no oil pressure on gauge or no oil coming out from hose that goes to gauge (left it unhooked at first, but then hooked it up.)

Should oil pickup have O-Ring or Gasket or BOTH between it and the pump?

Oil is getting to the head because it's washing away the assembly lube and cams lobes have a coating on them. But 0 oil pressure while cranking with no plugs..

I know I have:
Oil Squiters
Gasket between pickup and Pump
New Pump, facing the right way (did not pack it with grease though).
O-Ring gasket thing between front cover and block.

Should I be able to see oil pressure if I crank for 20-30+ seconds a few times? Or should I just try to start it up and see what happens?

modulation
Dreams of owning a 240!
Posts: 83
Joined: Fri Jun 12, 2015 4:55 pm

Re: Oil pressure while cranking?

Post by modulation » Mon Sep 14, 2020 2:59 pm

To answer my own questions I never could get oil pressure while cranking, but I saw oil in the head washing away assembly lube. Previously I tested galleys with compressed air while the engine was on a stand, and I could feel air come out the head by the 1st journals in both cams when I put it compressed air though the oil filter connections.

I said oh well and fired it up, took 1/2 second or 2 but built up oil pressure to 65+ psi or so at 2-3krpms. Ran it for 5 minutes 4-5 different times running the engine up to temp and oil pressure looked great. Did my first oil change and here's what I found, seems pretty typical first oil change so I assume everything is good.
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NukeKS14
Dreams of owning a 240!
Posts: 99
Joined: Thu Jan 09, 2020 8:33 pm
Location: Northeastern KS

Re: Oil pressure while cranking?

Post by NukeKS14 » Mon Sep 14, 2020 6:11 pm

Glad to hear you got it up and running. That's good oil pressure, especially if you're running an oil cooler.

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