6 Types of Bypass Valves Used in Spin On Oil Filters

[@Redneck_Ed]

Thanks to WhipCityWrencher for the explanation of Type 6 (no bypass). Tractor hydraulic pumps and transmissions have pressure relief valves built into the systems to act as a bypass. No need for bypass in the hydraulic spin on filter.

[@chrishunt5291]

Another good video, Ed.

[@WhipCityWrencher]

Very well explained! Great Job👍💯

[@Redneck_Ed]

Thank you so much for watching! I've updated the video description with a link to your channel and to one of your videos along with a declaration that your channel is the best oil filter deconstruction channel on KZbin!! I'll get this video published to the public later today.

[@WhipCityWrencher]

@@Redneck_Ed Thank You😊👍

[@caribbeanbound8357]

if an oil filter has only a "tension spring", and no bypass valve, that spring is being used for tension up until bypass is needed. It may activate during a cold start or if the filter media is clogged. If it didn't bypass and the engine has no oil, there is no longer a working engine. Better to have dirty oil than no oil.

[@Redneck_Ed]

The only "bypass" you'd get would be at a certain point where the filter would start to burst and leak through in an uncontrolled "bypass." Think about all of the pressure forces in that outer vessel of unfiltered oil if the pleats are clogged...the pressure is acting in all directions, not in a controlled manner for creating tension spring compression. You can look up numerous Wix models (e.g. Wix WL10079) and they will indeed be listed as having "none" for a bypass. A filter with no bypass is intended for systems that have a secondary method of bypass. Engine filters normally do have bypass for the reasons you stated. Hydraulic systems might not per the pinned comment.

[@caribbeanbound8357]

@@Redneck_Ed agreed. but this is the bypass in many situations for engine oil filters.

[@Redneck_Ed]

@@caribbeanbound8357 Out of genuine curiosity, can you cite a engine oil filter model number that is designed to act in that manner?

[@chrisyoung5363]

​@@Redneck_Ed for example, Fram FE3980 for a 2001-2005 Buick Lesabre 3.8 L. The correct filter had an ADV, but no BPV. The Lesabre's internal bypass valve is rated for 21 psi. I found one on the Summit Racing website for about 10 usd. For my Buick Lesabre, heh heh... :D