bypass ?

[drg]

Where is the bypass on an oil filter . I here people talk of them but could someone point it out for me , Thanks Darris

 

[heypete]

Depends. Many filters have them on the "dome end" (the closed end, on the far side from where it screws into the engine) of the filter, while others have "thread end" valves.

An example of the dome-end bypasscan be found here. You can see how the bypass valve rests on the top of the filter media in the last picture.

 

[drg]

Thanks heypete for looking that up for me. With the pic I see exactly what it is and how it works, Darris

 

[daman]

To add most like the threaded end BP better because they feel the oil in "by pass" will not wash over the dirty contaminated media flushing it back into the engine when a dome end BP is used.

 

[heypete]

drg: No problem.

Also, note that that in addition to the bypass valve on a full-flow oil filter (which is what I described above), there's another use of the term: one can have a bypass oil filter which, rather than handling the full flow of the oil, diverts (or "bypasses") a portion of the oil flow through a secondary filter.

By not having to deal with the full flow, a bypass filter is often able to use finer media and remove smaller particles than full-flow filters. It's rare on gasoline-powered cars, but frequently used on diesel engines. It can frequently keep oil serviceable for considerably longer intervals than a full-flow alone.