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#4391845 - 04/29/17 05:36 AM Are uneven or wavy pleats that big of a deal?
gfh77665 Offline


Registered: 09/01/08
Posts: 3803
Loc: Southeast Texas
Assuming no tears or separations, wouldn't uneven or wavy pleats still filter basically just as well?

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#4391850 - 04/29/17 05:40 AM Re: Are uneven or wavy pleats that big of a deal? [Re: gfh77665]
3800Series Offline


Registered: 08/02/14
Posts: 1452
Loc: Gulf Coast, MS
It can effect the flow rate of the filter in some cases and even lower its ability to hold particles but this is more of the guessing side of things with no real evidence on hand.

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#4391886 - 04/29/17 06:43 AM Re: Are uneven or wavy pleats that big of a deal? [Re: gfh77665]
Bottom_Feeder Offline


Registered: 12/07/08
Posts: 3013
Loc: Occupied Virginia
I've long argued that it doesn't make a bit of difference.

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#4391889 - 04/29/17 06:54 AM Re: Are uneven or wavy pleats that big of a deal? [Re: gfh77665]
Eddie Offline


Registered: 12/07/03
Posts: 9580
Loc: Florida, Cape Coral
I agree with Bottom_Feeder. Ed
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#4391921 - 04/29/17 07:52 AM Re: Are uneven or wavy pleats that big of a deal? [Re: Bottom_Feeder]
edwardh1 Offline


Registered: 01/17/03
Posts: 2945
Loc: Coastal South Carolina
Originally Posted By: Bottom_Feeder
I've long argued that it doesn't make a bit of difference.


agree

its the filter media that does the work, -------and the home boys have no way to meaaure its efficience so we get comments like "looks nice"
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#4391931 - 04/29/17 08:05 AM Re: Are uneven or wavy pleats that big of a deal? [Re: gfh77665]
2015_PSD Online   content


Registered: 09/26/10
Posts: 7248
Loc: SE Texas
I would say yes they would, however, IMHO, it also points towards lack of overall quality and/or design. Case in point are the MC filters for my PSD. They are very long and the media is wavy to say the least. I think there could be a higher risk of torn media on a long filter where the media is not properly supported (pointing towards design). Most of the WIX and Baldwin filters (certainly all of the CarQuest Blues that I have) all use wire backed media. To me this is a better design or higher quality for the application. YMMV!
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2015 F-250 6.7L PS Diesel - Delo 5W-40/CQ Blue
2014 Explorer 3.5L Limited - M1 AFE 0W-20/FU

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#4391951 - 04/29/17 08:36 AM Re: Are uneven or wavy pleats that big of a deal? [Re: gfh77665]
VetteElite Offline


Registered: 04/20/13
Posts: 116
Loc: -
I don't like them because even the cheapest cartridge filter achieves evenly spaced, straight pleats. So canister filters which don't just tell me that the manufacturer is being lazy and hiding poor quality behind a metal can that we can't see inside.

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#4391980 - 04/29/17 09:00 AM Re: Are uneven or wavy pleats that big of a deal? [Re: gfh77665]
Onug Offline


Registered: 03/19/12
Posts: 344
Loc: Washington, USA
I've wondered about this question too and not understood the concern about wavy pleats. Assuming the media wasn't wavy from the factory, it implies stresses are being applied. So the questions should be where is the stress coming from and is the filter not designed for the associated stresses?

My guess is the media expands as it fills with oil. The long pleats will expand more lengthwise, and with a rigid top and bottom, they're likely to start bending/bowing and creating the waves we see. The media itself is pliable, so I don't think the stress of the moving material loads the top and bottom where it's glued firmly to the metal caps. But maybe it does and this creates a stress point that can start to tear over time.

All speculation without any real science. Would be cool to know if the bends happen soon after installation or over the course of the cycle...
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2016 F-150 3.5L Ecoboost
Current Oil: Mobil 1 5W-30 and Fram Ultra filter

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#4392157 - 04/29/17 12:24 PM Re: Are uneven or wavy pleats that big of a deal? [Re: Bottom_Feeder]
HerrStig Offline


Registered: 08/24/11
Posts: 9560
Loc: Boston, MA
Originally Posted By: Bottom_Feeder
I've long argued that it doesn't make a bit of difference.
+1 Only to certain Framboys who can predict the future.

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#4392159 - 04/29/17 12:25 PM Re: Are uneven or wavy pleats that big of a deal? [Re: edwardh1]
HerrStig Offline


Registered: 08/24/11
Posts: 9560
Loc: Boston, MA
Originally Posted By: edwardh1
Originally Posted By: Bottom_Feeder
I've long argued that it doesn't make a bit of difference.


agree

its the filter media that does the work, -------and the home boys have no way to meaaure its efficience so we get comments like "looks nice"
+1 Love the "science" there.

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#4392235 - 04/29/17 02:53 PM Re: Are uneven or wavy pleats that big of a deal? [Re: HerrStig]
ZeeOSix Offline


Registered: 07/22/10
Posts: 17795
Loc: PNW
Originally Posted By: HerrStig
Originally Posted By: Bottom_Feeder
I've long argued that it doesn't make a bit of difference.
+1 Only to certain Framboys who can predict the future.


LoL, big tears in the media (along with wavy pleats) doesn't matter to Tearolator fanboys either ... grin

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#4392366 - 04/29/17 06:03 PM Re: Are uneven or wavy pleats that big of a deal? [Re: 2015_PSD]
WellOiled Offline


Registered: 10/03/15
Posts: 1358
Loc: Houston, Texas
Originally Posted By: 2015_PSD
I would say yes they would, however, IMHO, it also points towards lack of overall quality and/or design. Case in point are the MC filters for my PSD. They are very long and the media is wavy to say the least. I think there could be a higher risk of torn media on a long filter where the media is not properly supported (pointing towards design). Most of the WIX and Baldwin filters (certainly all of the CarQuest Blues that I have) all use wire backed media. To me this is a better design or higher quality for the application. YMMV!

+1 Wavy and crooked pleats are a sign of poor quality or a design defect. They filter until the media ruptures. Then the filter operates in bypass depending upon the area of the rupture. In my view this is a filter failure and the filter did not perform as advertised. The wavy or crooked pleats is also a sign that under slightly more stress, the likelihood of a media rupture is higher.
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#4392534 - 04/29/17 08:47 PM Re: Are uneven or wavy pleats that big of a deal? [Re: WellOiled]
Dallas69 Offline


Registered: 02/11/14
Posts: 1664
Loc: Texas
Wavy or perfectly straight it filters the same.
I don't think its a big deal.As long as the filter does its job I don't care what it looks like inside.
_________________________
2009 Galant-ultra oil and filter
1987 Ford F-150 302
Smittys 5-30
Motorcraft filter

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#4392803 - 04/30/17 08:38 AM Re: Are uneven or wavy pleats that big of a deal? [Re: gfh77665]
bullwinkle Offline


Registered: 10/09/04
Posts: 7673
Loc: Cincinnati, OH, USA
Wavy in itself isn't bad, it's the tears & holes you have to watch out for. Otherwise this Purflux wouldn't filter at all-it's all waves!
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#4393848 - 05/01/17 01:35 PM Re: Are uneven or wavy pleats that big of a deal? [Re: gfh77665]
compratio10_5 Offline


Registered: 12/07/15
Posts: 83
Loc: Pocatello, Idaho
The largest stresses on an oil filter come from cold starts where the oil viscosity is at least 100 times higher than at operating temperature. These repeated pressure surges when the cold engine first lights off at high idle and before the bypass valve can open causes fatigue stresses and deterioration in the filter media. Wavy filter media indicates to me that it is not adequately supported during pressure surges and could release or dump a cloud of very fine (< 10 micron) particulate, that the filter has previously captured, back into the oil stream. Until the filter companies start releasing dynamic filter test data, we will never know for sure and be left relying upon what we can see when the filters are cut open. This is one reason I check Bitog. Does anyone here have any information on the dynamic performance of lube oil filters during real life conditions?
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