Then why did the oil pressure change with the different filters? If the gauges were driven dumb from the ecm. Reducing delta P across the filtering media. Would have no impact upon the panel display(s). Oil gallery pressure would increase if the oil pump relief valve spent less time open or open less with the reduced restriction filter. The restriction to oil flow would be reduced in the filter. Thus increasing pressure in the engine's oil galleries if the lube gallery passges/orfices metering stayed constant.
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Today's Featured Article - Farmall 460: That's My Girl - by LeAnn R. Ralph. How many sounds can you think of that are as familiar to you as your own breathing? What about the hum of your refrigerator? Or the thump of your clothes dryer? Maybe the engine of your car? You hear those sounds every day, and you don't think much about them, do you. I can think of a few common, ordinary sounds in my daily life, too.
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