Patman
Staff member
I think you'll be surprised. On my LT1, when I used the PF35 (without an ADBV) not as much oil came out from the oil filter base when I loosened it as what comes out now that I'm using a K&N, with the ADBV. And if I've got the drain plug still open when I take off the filter, quite a bit of oil comes out of the drain plug too, even if it had previously stopped dripping.quote:
Originally posted by sbc350gearhead:
Yes....that theory has been discussed here before, and although it seems quite logical, I (and a few others) am not convinced that it works in application. For example. Tonight, Out of curiousity, I cracked loose the PF35L oil filter (no ADBV) on my camaro, and measured the oil that leaked out from above the filter.............7-8 ounces. The car has not been started since early december. The next time I change the oil on my truck (pf1218......virtually the same filter, but with an ADBV), I will measure the oil above the filter (although I can't give it 2 months to drain back.....more like 1 day), and compare it to the results from my camaro. But honestly, I don't think there will be much difference.quote:
Originally posted by ZR2RANDO:
sbc350gearhead,
even if the filter is mounted with the open end up , a functioning adbv can still be a good thing. If it works like it is supposed to it not only holds oil in the filter itself (a given if the open end is up, ,,granted), but it can also hold back oil that is above the filter itself..keeping it from draining backwards through the filter towards the oil pan. Depends on the design of the system, One-way valves are a good thing in a hydraulic sense...
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