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#4551188 - 10/22/17 04:55 PM Vertical filters putting sludge right under bypass
SOHCman Offline


Registered: 03/29/10
Posts: 1286
Loc: USA

With most filters seemingly having the bypass at the end of the filter media, could it theoretically intake sludge that collects in the base of a vertically or relatively vertically mounted filter?

I realize clean engines probably don't collect an appreciable amount of sludge, but filters like this one posted recently show what is possible.

Cheers
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If you want to do the whole "I'm a complete drop-kick" thing properly, they're the cars you drive, complete with the "doof-doof" sound system, loud exhaust, low profile tires and so on. -B320i

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#4551210 - 10/22/17 05:17 PM Re: Vertical filters putting sludge right under bypass [Re: SOHCman]
JC1 Offline


Registered: 11/29/08
Posts: 3004
Loc: Oshawa, Ontario Canada
What motor is that filter mounted on?
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2015 Grand Caravan SXT Plus 5w-20 PPPP/Wix Filter
1997 Honda Civic CX 5w-30 PPPP/Mahle Filter

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#4551219 - 10/22/17 05:28 PM Re: Vertical filters putting sludge right under bypass [Re: SOHCman]
blupupher Offline


Registered: 08/27/04
Posts: 4421
Loc: Katy, Republic of Texas
Yes, that is a concern, Motorcraft filters advertise that (or at least used to) as a benefit of thread end bypass valves.
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#4551220 - 10/22/17 05:32 PM Re: Vertical filters putting sludge right under bypass [Re: JC1]
car51 Offline


Registered: 03/12/15
Posts: 10256
Loc: Southwest PA
Originally Posted By: JC1
What motor is that filter mounted on?


It was on a Hyundai engine
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#4551228 - 10/22/17 05:39 PM Re: Vertical filters putting sludge right under bypass [Re: SOHCman]
dlundblad Offline


Registered: 09/30/13
Posts: 10033
Loc: Indiana
It was still there when you took the filter off so obviously it's not an issue. smile

Next oil change, race the engine when cold, turn it off and drain the oil. It'll still collect there.


Edited by dlundblad (10/22/17 05:39 PM)
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#4551250 - 10/22/17 05:56 PM Re: Vertical filters putting sludge right under bypass [Re: SOHCman]
Sayjac Offline


Registered: 10/13/08
Posts: 12264
Loc: The Old North State
Yeah, that anecdote is one the uglier ones I've seen posted here. That said, best information including the pinned Jim Allen thread at the top, say bypass events are rare and when they do occur of short duration.

Some say thread end bypass in vertical dome end up filters not the best. And vice versa, dome end bypass in vertical dome end down, same. Outside of Ford many OEM have the latter design, Honda and many GM models come to mind off top of my head.

'IMO', not a huge deal either way especially in light of noted knowledge of bypass events.

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#4551414 - 10/22/17 08:25 PM Re: Vertical filters putting sludge right under bypass [Re: SOHCman]
SOHCman Offline


Registered: 03/29/10
Posts: 1286
Loc: USA
Yes, this is a recent cut and post from a Hyundai engine.

Interestingly enough, a motorcraft filter is the only filter I have cut open to find no bypass valve on the bottom.

I once thought Napa Gold (a fine fine filter by all accounts) had a thread side bypass setup, but the last one I bothered to cut open had the valve on the bottom?

Has BITOG created a list of which filters have what bypass? Thanks!
_________________________
If you want to do the whole "I'm a complete drop-kick" thing properly, they're the cars you drive, complete with the "doof-doof" sound system, loud exhaust, low profile tires and so on. -B320i

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#4551627 - 10/23/17 05:44 AM Re: Vertical filters putting sludge right under bypass [Re: SOHCman]
dnewton3 Offline



Registered: 05/14/07
Posts: 7391
Loc: Indianapolis, IN
In theory, it could.
In practical application, I doubt little, if any, ever makes the trip as you inquire.

The BP valve RARELY opens in the first place, and when it does, it's for a very short duration (anywhere from a fraction of a second to only a few seconds under obscene conditions). (See Jim Allens test results).
_________________________
The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money

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#4551632 - 10/23/17 05:55 AM Re: Vertical filters putting sludge right under bypass [Re: SOHCman]
Shannow Online   content


Registered: 12/12/02
Posts: 39863
Loc: 'Stralia
Regardless of where you put the bypass, there will be some accumulation of junk in the quiescent area that will be mobilised when it opens.

Filter bypass in block even has dead headed areas.

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