Oil Flow Method The oil fed by pressure from the oil pump is split into a full flow filter and a bypass filter (the filters are provided in their own separate cases). The oil passing through the full flow filter is fed by pressure to the engine`s main body, while the oil passing through the bypass filter is returned to the oil pan.
Features This filter type is widely used for diesel-powered vehicles.
The bypass filter is used to eliminate carbon dirt and particles that cannot be caught by the full flow filter. For this, pores on the filter element are made smaller. As a result, resistance of oil pressure in the bypass filter is higher compared to that in the full flow filter, taking more filtering time.