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Double By-Pass Oil Filter? #4712236
03/31/18 10:40 AM
03/31/18 10:40 AM
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
BlueOvalFitter Offline OP
BlueOvalFitter  Offline OP
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
Before I ask my Q?, I want to state that a member here has sent me PM's calling me a moron. I guess my sense of humor has labled me as such. I apologize.
I have seen/used oil filters with a double by-pass (I'm almost certain they have a double by-pass). Why would an oil filter have a double by-pass? In case one were to fail? They are set to open at different psi?
shrug

Re: Double By-Pass Oil Filter? [Re: BlueOvalFitter] #4712250
03/31/18 10:52 AM
03/31/18 10:52 AM
Joined: Oct 2008
Posts: 12,471
The Old North State
Sayjac Offline
Sayjac  Offline
Joined: Oct 2008
Posts: 12,471
The Old North State
Technically speaking there is a normal anti-drain back valve with an anti-siphon valve. The anti-siphon is in the center tube and seen near the outlet hole.

Iirc, the Ford Zetec engine specs a filter with that set up. In addition to adbv, the anti-siphon valve apparently needed to help assure oil remains in the filter.

There is also a separate dome bypass which performs it's normal function.

Last edited by Sayjac; 03/31/18 11:03 AM. Reason: added comment
Re: Double By-Pass Oil Filter? [Re: BlueOvalFitter] #4712285
03/31/18 11:26 AM
03/31/18 11:26 AM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
All it does (like the supertech ST8316) is keep the entire filter full of oil


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Double By-Pass Oil Filter? [Re: Linctex] #4712316
03/31/18 11:50 AM
03/31/18 11:50 AM
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
BlueOvalFitter Offline OP
BlueOvalFitter  Offline OP
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
Originally Posted By: Linctex
All it does (like the supertech ST8316) is keep the entire filter full of oil

Is this aimed at oil filters that are inverted, AKA-dome end facing up, or on an angle 90* or more?

Re: Double By-Pass Oil Filter? [Re: BlueOvalFitter] #4712438
03/31/18 02:34 PM
03/31/18 02:34 PM
Joined: Dec 2003
Posts: 9,795
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,795
Florida, Cape Coral
I like your questions and comments BlueOvalFitter. Some id10t is trolling you. Ed


CX5 Touring 2.5L :-)
Re: Double By-Pass Oil Filter? [Re: BlueOvalFitter] #4712502
03/31/18 04:11 PM
03/31/18 04:11 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: BlueOvalFitter
Originally Posted By: Linctex
All it does (like the supertech ST8316) is keep the entire filter full of oil

Is this aimed at oil filters that are inverted, AKA-dome end facing up, or on an angle 90* or more?


That would be logical reasoning.... I think the ZETEC had them horizontal


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Double By-Pass Oil Filter? [Re: Linctex] #4712506
03/31/18 04:16 PM
03/31/18 04:16 PM
Joined: Dec 2006
Posts: 527
ohio
xtell Offline
xtell  Offline
Joined: Dec 2006
Posts: 527
ohio
Linctex,

I checked the Wix filter site and they list a 51315 filter. But it appears to just be a regular filter. Baldwin, Fram and Purolator do not cross reference to a ST 8316. I'm having trouble understanding how this filter works. Along with a regular anti drain back seal / valve and bypass valve, as found on most filters, is there another one way seal/valve inside the center tube that keeps the oil in the filter?

Re: Double By-Pass Oil Filter? [Re: xtell] #4712512
03/31/18 04:26 PM
03/31/18 04:26 PM
Joined: Oct 2008
Posts: 12,471
The Old North State
Sayjac Offline
Sayjac  Offline
Joined: Oct 2008
Posts: 12,471
The Old North State
Originally Posted By: xtell
.....I'm having trouble understanding how this filter works. Along with a regular anti drain back seal / valve and bypass valve, as found on most filters, is there another one way seal/valve inside the center tube that keeps the oil in the filter?

Yes there is. It can be seen in slacktide bitog's linked TG 8316 c&p.

https://bobistheoilguy.com/forums/ubbthreads.php/topics/3866309/Not_bad_for_a_cardboard_Fram!_

As for the OT trolling accusation, not sure who that would be in this thread as imo and observation seems all answers put forth in an honest attempt to answer the topic question.

Re: Double By-Pass Oil Filter? [Re: BlueOvalFitter] #4712523
03/31/18 04:42 PM
03/31/18 04:42 PM
Joined: Jul 2010
Posts: 18,654
PNW
ZeeOSix Offline
ZeeOSix  Offline
Joined: Jul 2010
Posts: 18,654
PNW
Yep, just a low pressure check valve in the bottom of the center tube to prevent the filter from siphoning/draining out the base center hole. Think of it as the center tube ADBV.

Apparently some engines can drain the filter from both the filter inlet and outlet.

Re: Double By-Pass Oil Filter? [Re: ZeeOSix] #4712606
03/31/18 06:26 PM
03/31/18 06:26 PM
Joined: Mar 2016
Posts: 1,393
Western S.C. since 1996
CR94 Offline
CR94  Offline
Joined: Mar 2016
Posts: 1,393
Western S.C. since 1996
Originally Posted By: ZeeOSix
... Apparently some engines can drain the filter from both the filter inlet and outlet.
Maybe so, but I don't see how, considering that healthy ADBVs seem to require a little pressure to open them even in the forward flow direction. Maybe if the filter is mounted high there'd be enough hydrostatic pressure difference to open the valve and allow oil to siphon out. ??


2011 Toyota Prius now at 92K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K
Re: Double By-Pass Oil Filter? [Re: BlueOvalFitter] #4712613
03/31/18 06:34 PM
03/31/18 06:34 PM
Joined: Oct 2014
Posts: 2,408
San Antonio, TX
Nyogtha Offline
Nyogtha  Offline
Joined: Oct 2014
Posts: 2,408
San Antonio, TX
A friend's Audi TGDI uses an oil filter with both ADBV & anti-siphon valve to minimize delay in oil supply for the turbo. The Fram model number is PH / XG 10600, Mobil 1 is M1-404. This particular filter mounts vertically dome end up on the top side of the engine. It has a dome end BPV.

Last edited by Nyogtha; 03/31/18 06:39 PM.

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