Originally Posted By: JeePing
Originally Posted By: rooflessVW
Having the bypass valve is not a non-issue if your car is specifically modified to not have a filter bypass.
In any case - the LS has an internal bypass, so why spend the money to put one in the can where it's not needed?
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Holly [censored] ... people who read this. please, do not listen to the nonsense above. Every engine, with pressurized lubricating system, driven by positive displacement pump has a pressure relief. Or what uninformed poster calls a "bypass". The reason for filter to have pressure relief valve internal and independent is to keep oil flowing to the engine even if filter is completely clogged. If filter does not have a relief, oil will simply dump into the sump with out circulating through the engine.
Actually, there are usually TWO pressure relief valves-one on the oil pump (which dumps the oil back into the sump), and one either in the filter or in the block that allows oil to bypass a blocked filter OR during extreme cold/thick oil events. Some SB Chevy oil filters have a filter bypass, other ones don't-and I have never heard of any issues caused by having the extra one in the filter!