oil filter
Tourer
Joined: Sep 2017
Posts: 280
Likes: 96
From: DFW Texas
This is why this the original post was not whining. I appreciate someone that sees a potential problem and is trying to find out if this is just the one he has or is it a more widespread issue.
This is good information for all of us to keep an eye out as we do oil changes and check the filters. Quite frankly, I would not have looked down inside before, but now I will!!!
Even with my Wix fiters......
This is good information for all of us to keep an eye out as we do oil changes and check the filters. Quite frankly, I would not have looked down inside before, but now I will!!!
Even with my Wix fiters......
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,158
Likes: 11,247
From: San Diego, CA
I don't believe so....
Other than leaking piston jets, most sumping issues are believed to be issues with scavenging the oil from the cases (sump)....
IIRC....
The oil scavenged from the cases (sump), goes through the oil pump scavenge gerotors, out to the oil cooler, through the heads (on oil cooled models), and then back to the oil pan.... The scavenged oil does not go through the oil filter..
The oil through the filter comes from the pan, the oil pump feed gerotors, and then the oil filter...
If I remembered that wrong I'm sure I will be corrected...
Thread Starter
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Seasoned HDF Member
Joined: Oct 2012
Posts: 11,226
Likes: 3,049
From: St.Louis Mo.
I don't believe so....
Other than leaking piston jets, most sumping issues are believed to be issues with scavenging the oil from the cases (sump)....
IIRC....
The oil scavenged from the cases (sump), goes through the oil pump scavenge gerotors, out to the oil cooler, through the heads (on oil cooled models), and then back to the oil pan.... The scavenged oil does not go through the oil filter..
The oil through the filter comes from the pan, the oil pump feed gerotors, and then the oil filter...
If I remembered that wrong I'm sure I will be corrected...
Other than leaking piston jets, most sumping issues are believed to be issues with scavenging the oil from the cases (sump)....
IIRC....
The oil scavenged from the cases (sump), goes through the oil pump scavenge gerotors, out to the oil cooler, through the heads (on oil cooled models), and then back to the oil pan.... The scavenged oil does not go through the oil filter..
The oil through the filter comes from the pan, the oil pump feed gerotors, and then the oil filter...
If I remembered that wrong I'm sure I will be corrected...
Tourer
Joined: Apr 2010
Posts: 297
Likes: 150
From: Florida Space Coast
I was thinking if the oil pump was pushing the oil though the filter and it was restricted the pressure would be backing up in the engine and the oil has to go someplace. This makes some sense with the addition of the seal on the backside of the pump, between the pump and engine case . Could this back fill the case with oil ? Isn't this the reason they went to a bigger filter filter so it could flow more? Just some things for thought. If nothing else we have had some good conversations on the subject and may have shed some light on this problem.
“These reports of people saying their engine was making noises with a new filter should be looking to see if the louvers (if it has them) are mere slits causing the filter to be choked way down and the PD pump to be in relief, causing the oil supply to the engine to be cut way down.”
On post #30 he states:
“If the oil filter is basically clogged (due to debris and/or very closed off louvers) and almost all the oil flow needs to go through the bypass valve, most bypass valves are pretty small and will therefore increase delta-p even more as the pump tries to force the output volume through the bypass. This can put the PD pump into relief or make a worn pump slip a lot. Of course a nearly clogged filter will cause different reactions on different engines.”
Last edited by BigD48; Aug 31, 2022 at 01:15 PM.
HDF Community Team
Joined: Nov 2012
Posts: 6,190
Likes: 2,419
From: USA
Its purpose mainly is to let oil flow through the engine, even if the filter media is blocked. Normally that would be a very dirty filter. In this case, it would be s defective filter.
Thread Starter
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Seasoned HDF Member
Joined: Oct 2012
Posts: 11,226
Likes: 3,049
From: St.Louis Mo.
They discussed this same thing over in the bobistheoilguy (BITOG) thread. On post #28 the guy states:
These reports of people saying their engine was making noises with a new filter should be looking to see if the louvers (if it has them) are mere slits causing the filter to be choked way down and the PD pump to be in relief, causing the oil supply to the engine to be cut way down.
On post #30 he states:
If the oil filter is basically clogged (due to debris and/or very closed off louvers) and almost all the oil flow needs to go through the bypass valve, most bypass valves are pretty small and will therefore increase delta-p even more as the pump tries to force the output volume through the bypass. This can put the PD pump into relief or make a worn pump slip a lot. Of course a nearly clogged filter will cause different reactions on different engines.
These reports of people saying their engine was making noises with a new filter should be looking to see if the louvers (if it has them) are mere slits causing the filter to be choked way down and the PD pump to be in relief, causing the oil supply to the engine to be cut way down.
On post #30 he states:
If the oil filter is basically clogged (due to debris and/or very closed off louvers) and almost all the oil flow needs to go through the bypass valve, most bypass valves are pretty small and will therefore increase delta-p even more as the pump tries to force the output volume through the bypass. This can put the PD pump into relief or make a worn pump slip a lot. Of course a nearly clogged filter will cause different reactions on different engines.
Tourer
Joined: Apr 2010
Posts: 297
Likes: 150
From: Florida Space Coast
https://bobistheoilguy.com/forums/th...ilters.356961/
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Thread Starter
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Seasoned HDF Member
Joined: Oct 2012
Posts: 11,226
Likes: 3,049
From: St.Louis Mo.
There really is no difference between car and bike filters. Ive been running car filters on my 89 dresser for years.
https://bobistheoilguy.com/forums/th...ilters.356961/
https://bobistheoilguy.com/forums/th...ilters.356961/
Tourer
Joined: Apr 2010
Posts: 297
Likes: 150
From: Florida Space Coast
As long as the bypass setting is the same as the OEM you should be good. Generally speaking a lot of bypass valves open between 9-15 psi. Of the 5 vehicles I do oil changes on 4 of them have relief valves set at 9-15 psi.
Last edited by BigD48; Aug 31, 2022 at 03:18 PM.