Another question about this oil pressure problem.The oil filter screws on to the engine and there is a big hole in the middle of the filter.There are two other holes on the edge of the block inside of the oil filter gasket and one has the bypass valve in it and the other hole is part of the oil plumbing.Ok either the big hole is the inlet or outlet or viceversa the little hole that is left in the block is the inlet or outlet.Now think about the whole plumbing system and if there is 45psi at the main bearings....then there is 45psi inside the oil filter because it is a sealed system.If this is the case then if the relief valve on the block inside the oil filter were leaking then pressure would drop I think.What do y'all think about this?Also if the oil filter got stopped up pressure would rise to the point that relief valve should be forced open.Tonight I checked that valve out and it doesn't take much pressure with my pinky finger to depress it.Also I cranked the engine and while cold it was showing 30 to 40 psi.......at 3500 rpm it was showing 40 but at times it would jump between 30 and 40.At idle it was showing 20 psi.I let the engine warm up while I did my chores in the yard and when I checked again it was idling at 15psi oil pressure and when I revved it up to 2500 rpm it only showed 20 so it is also dropping as the engine warms........I guess this could be due to the variable weight oil.......I'm running 5w-30w in it.Anyway thanks guys for your inputs and help..........Sincerely Gerald
