Originally Posted By: chevrofreak
Originally Posted By: n8wvi
Originally Posted By: Soobs
4) The filter's Anti-Drainback Valve is made of silicone....
A silicone adbv is so important on an 'open-end-up' filter because....???
An ADBV works in all filter orientations. The filtered oil that has been pushed up inside of the engine will be pulled downward by gravity, and it will attempt to flow backwards through the filter. When it does this, if there is an ADBV, the pressure of the oil going backwards will hold it closed, not allowing the oil to drain back into the sump.
Sorry, I'm new to this stuff... Just curious - What's the problem if there was no ADBV and some of the oil were to flow back into the sump?