Oil Filter Flow Diagram

Secondary media when incorporated in a filter operate in a partial flow way. The system shown in the diagram is a partial full flow which means full oil pump pressure is routed tothru the filter and back to the engines oil galleys.

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Inside the filter a small portion 1 10 of the oil is directed through the secondary filter and the rest flows through the primary.

Oil filter flow diagram. Oil in the lifter galleries lubricates the lifters and is fed up the pushrods to the rocker arms and valvestems. As its name implies a full flow filter will draw all of the oil through the filter media. Oil from the pump continues its flow through the oil filter and up to the center main gallery where it oils the cam and main journals and fills the lifter galleries.

You are referring to the factory bypass system which does require a restrictor ahead of the filter and merely dumps the filtered oil back into the pan by gravity. Oil filters can also be categorized by the oil flow design. No restrictor is required.

After soaking through the media the oil leaves through the big hole at. Oil enters through the series of small holes just inside the sealing gasket. They are also called full flow because 100 of the engine oil passes through the oil filter in normal operationthe filters must work without introducing a lot of restriction to the fluid flow or else oil will not flow into the engine during cold start ups.

On the other hand a bypass filter only requires a fraction of the oil flow for sufficient flow rates within the system. Secondary media limits flow so the use and placement of it is highly restrictive in filters. Primary filters are standard on almost all modern engines.

Full flow filters contain primary media which stops particles as small as 25 microns and lower oil flow filters also include a secondary media capable of stopping particles between 5 10 microns.

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