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Maintenance & Fluids Discuss products, techniques, intervals, and fluids for maintaining your GM truck including oil and oil additives, fuel and fuel additives, alternative fuels (Bio-D, SVO, WVO), filters, grease, and maintenance specific tools.

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Old 04-07-2019, 03:00 PM   #1 (permalink)
Desert DMAX
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PF2232 Filter

Does anyone have recent experience in using or information regarding the most recent internal design change of the ACDelco PF2232?


I just bought a new PF2232(12691158), and have noticed, that there appears to no longer be a bypass spring inside the filter.

I usually buy an extra filter to rotate as a spare, and for the next future use, to keep in my fluids box.

The current PF2232(12677108) in my fluids box, that I intend to install next, has a spring on the inside at the bottom.

So, my question is, with the design change of no visible spring on the inside, what are the Pros and Cons, if any, of using the newer PF2232(12691158) that appears to have no internal spring but in the springs place, what looks to be either a piece of paper or plastic cap?

Thanks.

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Last edited by OkDually; 04-07-2019 at 03:26 PM. Reason: prefix/title adj
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Old 04-08-2019, 10:22 PM   #2 (permalink)
Mikey52
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Go to the duramax forum. There, a member has an oil filter shootout, where he cut open an analyzed the innnards of about 10 different filter brands. Baldwin came out on top.

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Old 04-09-2019, 06:23 AM   #3 (permalink)
TheBac
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Sounds like they've cheapened the 2232 filter. Probably a different mfg (sounds like Fram -- ugh), which is not a good thing. Time to change to another brand I guess.
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Old 04-12-2019, 09:51 AM   #4 (permalink)
MyShibby65TD
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Considering Mobil1, Fram, ACDelco, and STP have all moved to the plastic/nylon bypass valve it's debatable if it's "not a good thing". More than one company wouldn't be doing it if it was bad or a liability.

ACDelco are made by Champion labs last I checked, wouldn't surprise me if STP and others were too. I believe Fram only makes Fram.

I have yet to see proof of the plastic/nylon bypass valves failing.
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Old 04-15-2019, 12:37 PM   #5 (permalink)
Desert DMAX
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I installed a Baldwin B1441. It has an internal (metal) bypass spring.


All is well.


I returned the ACDelco PF2232 with internal (plastic) bypass.
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Old 04-15-2019, 12:53 PM   #6 (permalink)
Ron Nielson
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If a person changes their oil and filter when they should, and their engine is healthy, is there really a need for a pressure relief valve in an oil filter? How would a person know if their pressure relief valve was ever used/activated?
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Old 04-15-2019, 04:44 PM   #7 (permalink)
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Quote:
Originally Posted by Ron Nielson View Post
If a person changes their oil and filter when they should, and their engine is healthy, is there really a need for a pressure relief valve in an oil filter? How would a person know if their pressure relief valve was ever used/activated?

Filter bypass valves are to relieve a pressure differential within the filter (inlet has too much pressure compared to outlet). This is useful for cold climates when oil is thick at sub zero temperatures and doesn't like to flow easily. Without it the filter could cave in on itself, or at the least distort the pleat folds. The valve will open slightly and momentarily to get oil flowing, dirty oil is better than no oil. In warm and hot climates it probably doesn't get used much.



I suppose you could mark the valve some how. If it opened see if the mark moved. Not sure how exactly that could be done without possibly introducing something bad into the engine.
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