Originally Posted By: meep
7. i think there is bearing seep, which is fine. the crank, cams, rods, all have journals in them, in addition to block, pump, VVT systems... it can all drip out, right out, regardless of ADBV.
The ADBV isn't there to address any of those issues. It is simply to keep oil in the filter - nothing more, nothing less. Horizontal or thread side down filters will have their oil drain out unless there is a correctly functioning ADBV.
On any vehicle I've driven with a horizontal filter, I've tried to ensure that I used filters with ADBVs. I've tried with and without, however, and the difference is noticeable in startup noise. An old LTD I had with a horizontal filter ticked like mad for a few seconds upon startup if I had a filter with no ADBV. If I used the AC Delco, the FL1A, or the Wix, the noise wasn't there. If I was cheap and bought the old Motorcraft CFL1 with no ADBV, the noise was there.
My Audi's filter sits with the thread side pointing virtually straight up. The oil cannot drain out. Hence, OEM filters from Bosch, Mann, Mahle, and the like do not have ADBVs for that application because it would simply be redundant. I've purchased oil filters from all the OEM suppliers, and not one has had an ADBV.
The Wix equivalent has a silicone ADBV because they have other potential applications in mind with different filter orientations. I have used the Wix filter, but the ADBV is of absolutely no benefit in a thread side up filter.
As an aside, that's one major reason I like Wix. Their bypass settings are usually quite reasonable (and clearly posted online), there tends to be a silicone ADBV (whether needed or not), and overall construction is good. My rule is, when in doubt, use OEM or Wix. At least then, the dimensions of the filter won't be totally wonky and the pressures won't be out of whack.
7. i think there is bearing seep, which is fine. the crank, cams, rods, all have journals in them, in addition to block, pump, VVT systems... it can all drip out, right out, regardless of ADBV.
The ADBV isn't there to address any of those issues. It is simply to keep oil in the filter - nothing more, nothing less. Horizontal or thread side down filters will have their oil drain out unless there is a correctly functioning ADBV.
On any vehicle I've driven with a horizontal filter, I've tried to ensure that I used filters with ADBVs. I've tried with and without, however, and the difference is noticeable in startup noise. An old LTD I had with a horizontal filter ticked like mad for a few seconds upon startup if I had a filter with no ADBV. If I used the AC Delco, the FL1A, or the Wix, the noise wasn't there. If I was cheap and bought the old Motorcraft CFL1 with no ADBV, the noise was there.
My Audi's filter sits with the thread side pointing virtually straight up. The oil cannot drain out. Hence, OEM filters from Bosch, Mann, Mahle, and the like do not have ADBVs for that application because it would simply be redundant. I've purchased oil filters from all the OEM suppliers, and not one has had an ADBV.
The Wix equivalent has a silicone ADBV because they have other potential applications in mind with different filter orientations. I have used the Wix filter, but the ADBV is of absolutely no benefit in a thread side up filter.
As an aside, that's one major reason I like Wix. Their bypass settings are usually quite reasonable (and clearly posted online), there tends to be a silicone ADBV (whether needed or not), and overall construction is good. My rule is, when in doubt, use OEM or Wix. At least then, the dimensions of the filter won't be totally wonky and the pressures won't be out of whack.
