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No oil pressure

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WaltCasten said:
This is a good thread. My engine hasn't run for several years now due to a seemingly never ending restoration. I had the oil pan off to get the dents taken out so it is 100% dry. I was considering taking the plugs out and spinning it over to build pressure first, now I definitely will. Thanks for all the info and taking the time Michael.
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This should be the process on any engine that has been freshly rebuilt or sat for an extended period of time, particularly the 100-4. I previously had a BN2 that sat for over 15 years or so and it had lost the prime in the pump, once I removed the filter housing and pumped oil into the oil gallery, it cranked right up to 60 lbs on the starter. Just recently my BN1 that had been sitting since 1974 wouldn't produce any pressure on the gauge no matter what I did, so I removed the fitting in the block for the oil pressure line and cranked it for just a second or two and was getting plenty of flow so I knew that I was getting some pressure (FWIW, you can pour or pump oil directly into the main gallery & pump through this hole as well), so I had a sticky gauge. I picked up an Oil Pressure test gauge from Harbor Freight and got the included fittings to connect to the oil pressure flex hose to be sure how much pressure I had and I got 36 lbs on the starter and about 52 lbs when I finally got it started. Much better to know what you have than to guess. Anyway I hope this is helpful to someone out there.

Cheers,
Dan M.
 
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