Quote:
Originally Posted by 1937pickup
The interesting thing is the 10psi by pass-does this mean that over 10psi oil goes around the filter or under 10psi by passes the filter. In either case it means not all oil is being filtered all the time-very similar to a flathead filter.
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Yes that is correct.The bypass valve is in the filter adapter that is part of the engine.Common for gm engines.However all systems have a bypass valve and in other engines that valve is incorporated into the filter itself and the pressures differ a few pounds from engine to engine.The bypass pressure relates to how much pressure differential there can be until the valve opens up and bypasses the filter.In a cold climate there is no full flow until the oil warms up and the differential pressure drops below the valve setting.Good observation on your behalf.
