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#4543496 - 10/14/17 07:18 PM FRAM ULTRAŽ OIL FILTER xg2 by pass valve
littleant Offline


Registered: 10/10/17
Posts: 388
Loc: Vermont
Hi folks. On fram's website it states the XG2 has a by pass valve setting of 12. I assume that is 12 psi. If that is the opening pressure would that mean the valve would be open most of the time passing unfiltered oil or is there something I am missing. Thank you
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I can't prevent getting old but I REFUSE to grow up.
2010 Mountaineer 4.0
2002 Jeep Wrangler TJ 4.0

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#4543520 - 10/14/17 07:50 PM Re: FRAM ULTRAŽ OIL FILTER xg2 by pass valve [Re: littleant]
ZeeOSix Offline


Registered: 07/22/10
Posts: 17771
Loc: PNW
From how you state your question, seems you think the bypass "PSI" is related to the engine oil pressure. It's not.

The bypass valve operates off the pressure difference across the filter, which has nothing to do with the engine's oil pressure reading.

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#4543521 - 10/14/17 07:50 PM Re: FRAM ULTRAŽ OIL FILTER xg2 by pass valve [Re: littleant]
bullwinkle Offline


Registered: 10/09/04
Posts: 7664
Loc: Cincinnati, OH, USA
No, that means that differential pressure across the media needs to be greater than 12 PSI for the bypass valve to open. That would require a lot of dirt/sludge in the media, and likely high RPMs with cold oil for it to open.
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#4543522 - 10/14/17 07:50 PM Re: FRAM ULTRAŽ OIL FILTER xg2 by pass valve [Re: littleant]
FowVay Offline


Registered: 06/02/02
Posts: 2679
Loc: Southeastern USA
It should be 12 psi"D". This is the differential pressure between inlet and outflow. The difference between inlet and outflow will have to exceed a difference of 12 PSI before the by-pass valve opens.
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#4543539 - 10/14/17 08:06 PM Re: FRAM ULTRAŽ OIL FILTER xg2 by pass valve [Re: littleant]
Ethan1 Offline


Registered: 12/29/14
Posts: 1632
Loc: 'murica
3 people simultaneously gave the correct answer at 7:50 pm

UFO

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#4543549 - 10/14/17 08:22 PM Re: FRAM ULTRAŽ OIL FILTER xg2 by pass valve [Re: littleant]
littleant Offline


Registered: 10/10/17
Posts: 388
Loc: Vermont
Thank you. So if my oil pressure entering my filter is 35 psi an leaving the filter at 30 psi back to the engine the valve will not open.
_________________________
I can't prevent getting old but I REFUSE to grow up.
2010 Mountaineer 4.0
2002 Jeep Wrangler TJ 4.0

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#4543565 - 10/14/17 08:43 PM Re: FRAM ULTRAŽ OIL FILTER xg2 by pass valve [Re: littleant]
ZeeOSix Offline


Registered: 07/22/10
Posts: 17771
Loc: PNW
Originally Posted By: littleant
Thank you. So if my oil pressure entering my filter is 35 psi an leaving the filter at 30 psi back to the engine the valve will not open.

Correct, in that case the delta-p is 5 PSI. There would have to be a 12 PSI delta to open the bypass valve.

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#4543569 - 10/14/17 08:46 PM Re: FRAM ULTRAŽ OIL FILTER xg2 by pass valve [Re: ZeeOSix]
littleant Offline


Registered: 10/10/17
Posts: 388
Loc: Vermont
Originally Posted By: ZeeOSix
Originally Posted By: littleant
Thank you. So if my oil pressure entering my filter is 35 psi an leaving the filter at 30 psi back to the engine the valve will not open.

Correct, in that case the delta-p is 5 PSI. There would have to be a 12 PSI delta to open the bypass valve.
Perfect thank you
_________________________
I can't prevent getting old but I REFUSE to grow up.
2010 Mountaineer 4.0
2002 Jeep Wrangler TJ 4.0

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#4543822 - 10/15/17 09:00 AM Re: FRAM ULTRAŽ OIL FILTER xg2 by pass valve [Re: littleant]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
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#4543824 - 10/15/17 09:03 AM Re: FRAM ULTRAŽ OIL FILTER xg2 by pass valve [Re: littleant]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Another misconception on here is that people think once the bypass pressure is reached, they panic!!

"ALL of my oil is going around the element!!!!!"
Not true - MOST of the oil is still going through the element.

Even if .0001% of the oil is going through the bypass valve,
it is "officially" in bypass mode,
even if 99.9999% of the oil is **STILL** going through the element.
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4544057 - 10/15/17 12:54 PM Re: FRAM ULTRAŽ OIL FILTER xg2 by pass valve [Re: Linctex]
littleant Offline


Registered: 10/10/17
Posts: 388
Loc: Vermont
Originally Posted By: Linctex
Another misconception on here is that people think once the bypass pressure is reached, they panic!!

"ALL of my oil is going around the element!!!!!"
Not true - MOST of the oil is still going through the element.

Even if .0001% of the oil is going through the bypass valve,
it is "officially" in bypass mode,
even if 99.9999% of the oil is **STILL** going through the element.
Interesting read thank you
_________________________
I can't prevent getting old but I REFUSE to grow up.
2010 Mountaineer 4.0
2002 Jeep Wrangler TJ 4.0

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