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Oil filter pressure relief/bypass valve. If the oil filter becomes badly clogged, the pressure forces oil through the valve to provide unfiltered oil to the crank etc to avoid totally destroying the engine.
QuoteOil filter pressure relief/bypass valve. If the oil filter becomes badly clogged, the pressure forces oil through the valve to provide unfiltered oil to the crank etc to avoid totally destroying the engine.yes and the unfiltered oil tends to take bits of crap that has been sitting there with it through the bypass valve ,so you might still have a engine that is toast?
I thought they couldn't do that because of the cut outs / flat bit / whatever the proper name is.