Long time lurker...might have a few posts up...can't remember.
Anyway, I'm an ex toyota dealer tech, still do a lot of automotive diagnosis and repair...I've had a recent interest in oil filters after a few toyota V6 (3.4L, 4.0L) filter related issues have come up. First was a 3.4 that after skipping a day of driving, would have a solid knock for several seconds upon startup. The filter had less than 4K miles and less than 6 months old. Exchanged the orange filter for a Wix and the problem went away. The issue only occured once or twice so the motor should be OK. Second issue was on my wifes truck. 4.0L w/ 188K miles on it, well maintained, never an issue. Installed a "Pentius" filter, since the local jobber stocks them and said they were good. She drove it for a week and probably 40-60 drive cycles. I noticed a horrible knock one morning when she was leaving to drive our son to school. I replaced it with OE that day. One odd thing I noticed was that ZERO oil drained from the filter (inverted at about a 45° angle when installed) upon removal. I've NEVER, over the course of over 100 oil changes on the 2GR-FE engine in various vehicles, had a dry filter upon removal. With the new OE filter, the knock upon startup was significantly less pronounced, but still there...along with some lower end noise over 3000 rpms. The engine was damaged.
I decided to determine what was wrong with this filter, so I cut it open. I noticed that the ADBV didn't have a real positive seal against the top plate. Regardless of spring pressure pushing the element into the ADBV, the portion of the ADBV that creates the seal had no real pressure or deformation against the top plate...it was limited by the shape around the ID of the ADBV. I sourced a Denso, OEM from the dealer, and Mobil 1 filter, as well as some threaded plugs for the center hole. I made an adapter, submerged the filters in 5w-30 conventional oil meeting ILSAC GF5 and used a vacuum pump to accelerate the filling and saturation process, then installed the plugs, and wiped the filters clean externally. Each was weighed to establish a baseline. Each was then inverted on a rack and weighed every 2 hours for a day, then every day for a week. None lost a significant amount of oil, based on weight..which was surprising. The one that lost the most amount of weight after a week was the Denso. All others were insignificant.
Scratching my head, I cut the rest of them open. The Mobil 1 uses an orange ADBV...silcone. The OE toyota uses a black ADBV, not sure of the composition, but very pliable, and thin...serves its function well. One thing in common with these 2 is that with the ADBV sitting on top of the top plate, you can push the center of the rubber/silicone down and there is 1/8" or so of movement. This is an indication that there is some static tension of the ADBV against the top plate. With the Denso and the Pentius, there is no pressure, or minimal tension of the ADBV against the top plate to seal off the holes.
So I've determined the OE toyota and the Mobil 1 are of good designs and have very functional ADBVs. The Denso and Pentius seem to be more poorly designed, but still have somewhat functional ADBVs, when testing static sealing capability.
So...why did the Pentius filter empty itself in a short period of time? I have all the ADBVs sitting on the inverted top plates on my workbench. I grabbed the Denso and the Pentius ADBV valves and distorted them like a cowboy hat and held them that way for about 20 seconds, then set them back down on the top plates. The Denso immediately assumed it's original shape, sealing off the perimeter of the holes in the top plate. The pentius ADBV has a memory and held its shape, not sealing off the holes in the top plate while more than a minute passed.
Pictures tomorrow. But for now, if you have one of these engines, avoid Pentius. There is also this Youtube video...same part number, describing the same problem.
... https://www.youtube.com/watch?v=X4Dq7uxvXLI
relevant info at about the 2:04 mark.
Pentius thus far fails to admit a problem.
Anyway, I'm an ex toyota dealer tech, still do a lot of automotive diagnosis and repair...I've had a recent interest in oil filters after a few toyota V6 (3.4L, 4.0L) filter related issues have come up. First was a 3.4 that after skipping a day of driving, would have a solid knock for several seconds upon startup. The filter had less than 4K miles and less than 6 months old. Exchanged the orange filter for a Wix and the problem went away. The issue only occured once or twice so the motor should be OK. Second issue was on my wifes truck. 4.0L w/ 188K miles on it, well maintained, never an issue. Installed a "Pentius" filter, since the local jobber stocks them and said they were good. She drove it for a week and probably 40-60 drive cycles. I noticed a horrible knock one morning when she was leaving to drive our son to school. I replaced it with OE that day. One odd thing I noticed was that ZERO oil drained from the filter (inverted at about a 45° angle when installed) upon removal. I've NEVER, over the course of over 100 oil changes on the 2GR-FE engine in various vehicles, had a dry filter upon removal. With the new OE filter, the knock upon startup was significantly less pronounced, but still there...along with some lower end noise over 3000 rpms. The engine was damaged.
I decided to determine what was wrong with this filter, so I cut it open. I noticed that the ADBV didn't have a real positive seal against the top plate. Regardless of spring pressure pushing the element into the ADBV, the portion of the ADBV that creates the seal had no real pressure or deformation against the top plate...it was limited by the shape around the ID of the ADBV. I sourced a Denso, OEM from the dealer, and Mobil 1 filter, as well as some threaded plugs for the center hole. I made an adapter, submerged the filters in 5w-30 conventional oil meeting ILSAC GF5 and used a vacuum pump to accelerate the filling and saturation process, then installed the plugs, and wiped the filters clean externally. Each was weighed to establish a baseline. Each was then inverted on a rack and weighed every 2 hours for a day, then every day for a week. None lost a significant amount of oil, based on weight..which was surprising. The one that lost the most amount of weight after a week was the Denso. All others were insignificant.
Scratching my head, I cut the rest of them open. The Mobil 1 uses an orange ADBV...silcone. The OE toyota uses a black ADBV, not sure of the composition, but very pliable, and thin...serves its function well. One thing in common with these 2 is that with the ADBV sitting on top of the top plate, you can push the center of the rubber/silicone down and there is 1/8" or so of movement. This is an indication that there is some static tension of the ADBV against the top plate. With the Denso and the Pentius, there is no pressure, or minimal tension of the ADBV against the top plate to seal off the holes.
So I've determined the OE toyota and the Mobil 1 are of good designs and have very functional ADBVs. The Denso and Pentius seem to be more poorly designed, but still have somewhat functional ADBVs, when testing static sealing capability.
So...why did the Pentius filter empty itself in a short period of time? I have all the ADBVs sitting on the inverted top plates on my workbench. I grabbed the Denso and the Pentius ADBV valves and distorted them like a cowboy hat and held them that way for about 20 seconds, then set them back down on the top plates. The Denso immediately assumed it's original shape, sealing off the perimeter of the holes in the top plate. The pentius ADBV has a memory and held its shape, not sealing off the holes in the top plate while more than a minute passed.
Pictures tomorrow. But for now, if you have one of these engines, avoid Pentius. There is also this Youtube video...same part number, describing the same problem.
... https://www.youtube.com/watch?v=X4Dq7uxvXLI
relevant info at about the 2:04 mark.
Pentius thus far fails to admit a problem.
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