Just a six...The net effect of the hydraulic pressure between the forward cup in the master cylinder and the furthest wheel cylinder has got to be so minute that its gone to a scientific theory of some kind..If there is a certain pressure created at the master cylinder ..then there is the same pressure at the furthest wheel cylinder to us mechanics anyhow..Because we don't care about the minute difference..I guess I was thinking crankshaft bearing clearance pressure because of the small volume that exists in each and every journal compared to the large volume that exists in the oil filter..Sure there is probably 40 LBS in the oil filter all right but it is a different kind of pressure than exists at a journal..In your last thread you state that once the oil leaves the oil pump it can only decrease in pressure as it travels to the end of it's passage..(gauge)...And that means EVERYTHING has 40 LBS including the filter...If the pressure is decreased how could the system be the same through out?..I would say that volume is decreased at every machined surface that it encounters creating pressure. The pressure lost due to friction would be so minute it is not a factor here dealing with only 40LBS or so..The oil pump is made with a relief valve that is set for every engine ..true.. Another relief valve exists at the filter.Any oil that can not pass thru the dense pleats is simply bypassed..true..So if the gauge at the furthest end is reading too low the oil being bypassed at the filter would not effect the reading as long as the relief valve in the pump is working correctly..If the clearances at the journals is too large oil is bypassed there in too must quanity causing a low reading...true?..To bad you can't tap into the pressure line right after the oil pump..Compare it to the end of the block..I would sure be looking for an obstruction between the shafts and the gauge outlet pass the last lifter....
