On my newly built engine, I have had low oil pressure. It was at around 8 psi at idle untill I found out that I left the oil cooler bypass valve out. Now it idles at 12psi when warm and 40 psi when cold. Is there another plug I could have left out. I got the two for the lifter galleys, the two valves and plug under the oil filter, but is there any more?
I checked my bearing clearence before I built it and it was on the high side but still within the limits. Could it cause it to be this low?