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 - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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