Originally Posted By: ZeeOSix
Originally Posted By: WellOiled
Originally Posted By: ZeeOSix
Originally Posted By: kmrcstintn
... the combo valve on the vo-88 not such a big deal since filter mounts vertically on the bottom of my engine.
Still want the bypass function of the combo valve to work, that's the part of the combo valve that's questionable. Filter orientation has no effect on the bypass function.
What proof exists the bypass does not work?
No hard proof ... but think about nitrile rubber at 0 deg F and how it stiffens up. The combo valve's bypass function is dependent on the flexibility of the rubber. I'd rather have a metal spring that isn't affected by temperature.
This is a debate that needs a proper test in order to resolve it. I would love to see a bypass pressure vs temperature plot on this valve.
When I look closely at this valve, the primary force to be overcome would be leaf spring force transmitted through the nylon core to the flat ring of nitrile covering the 6 small holes. The PD oil pump should have little trouble overcoming the resistance of the lip formed in the nitrile even if a little stiff.
If what you are saying is true, we should be seeing a few collapsed cores and we don’t. It seems collapsed core events are rare. The ones I have seen were not eCores.
A mystery that may never be answered.
The average annual lows in Bismarck, ND is 2.2F. It was -17F in Fargo, ND this morning. Maybe we’ll get a collapsed core to look at.