oil filter
Here are pics of the Harley Oil Filter I bought from the dealership .
This is the filter to my 97 FXDS. I see all types of pics and post about oil and filters and it,s overwhelming. Everyone has a different opinion. I just do what I think is best for my bike and how and where I ride it. I want 20-50 Synthetic in everything. And as for the filter I just stuck with HD since they would not put a filter on a new bike under warranty if it would make bad publicity and cause them to eat the cost of replacement.
Here are my pics of the filter .
Here are my pics of the filter .
Road Captain
Joined: Sep 2019
Posts: 631
Likes: 571
From: Northern Nevada
Say what ? Guess that is why they did not put failing cam chain tensioners on twin cams, failing ABS systems on bikes, compensators that explode, etc, etc, etc.....yea, they would not do that....
Grand HDF Member
Joined: Aug 2020
Posts: 4,798
Likes: 5,889
From: Knoxville
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.
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Seasoned HDF Member
Joined: Oct 2012
Posts: 11,224
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From: St.Louis Mo.
If you don"t like it , don"t read it.
I"ll never understand why someone would click on a thread and then make a statement like this. Don"t be part of the discussion if you do not like the topic.
I"ll never understand why someone would click on a thread and then make a statement like this. Don"t be part of the discussion if you do not like the topic.
Seasoned HDF Member
Joined: Jan 2006
Posts: 11,475
Likes: 3,001
From: Charleston, SC
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.
If the oil filter was restricted, the oil would travel through the oil filter's bypass.
If that bypass was slow or clogged, the oil pressure would build and be purged at the cam plate through the oil pressure bypass valve into the cam chest where it would be picked up and sent back to the oil pan.
So in this case, a clogged or faulty oil filter or even a larger filter with higher flow, does not cause oil to build up inside the crankcase (sumping).
Sumping itself is a Oil scavenging (pickup and return) issue not a delivery issue.
Last edited by lp; Sep 4, 2022 at 09:03 AM.
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Seasoned HDF Member
Joined: Oct 2012
Posts: 11,224
Likes: 3,049
From: St.Louis Mo.
The oil passes through the oil filter before it goes out to all the individual areas which includes the engine crankcase.
If the oil filter was restricted, the oil would travel through the oil filter's bypass.
If that bypass was slow or clogged, the oil pressure would build and be purged at the cam plate through the oil pressure bypass valve into the cam chest where it would be picked up and sent back to the oil pan.
So in this case, a clogged or faulty oil filter or even a larger filter with higher flow, does not cause oil to build up inside the crankcase (sumping).
Sumping itself is a Oil scavenging (pickup and return) issue not a delivery issue.
If the oil filter was restricted, the oil would travel through the oil filter's bypass.
If that bypass was slow or clogged, the oil pressure would build and be purged at the cam plate through the oil pressure bypass valve into the cam chest where it would be picked up and sent back to the oil pan.
So in this case, a clogged or faulty oil filter or even a larger filter with higher flow, does not cause oil to build up inside the crankcase (sumping).
Sumping itself is a Oil scavenging (pickup and return) issue not a delivery issue.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,921
Likes: 8,027
From: poway
The oil passes through the oil filter before it goes out to all the individual areas which includes the engine crankcase.
If the oil filter was restricted, the oil would travel through the oil filter's bypass.
If that bypass was slow or clogged, the oil pressure would build and be purged at the cam plate through the oil pressure bypass valve into the cam chest where it would be picked up and sent back to the oil pan.
So in this case, a clogged or faulty oil filter or even a larger filter with higher flow, does not cause oil to build up inside the crankcase (sumping).
Sumping itself is a Oil scavenging (pickup and return) issue not a delivery issue.
If the oil filter was restricted, the oil would travel through the oil filter's bypass.
If that bypass was slow or clogged, the oil pressure would build and be purged at the cam plate through the oil pressure bypass valve into the cam chest where it would be picked up and sent back to the oil pan.
So in this case, a clogged or faulty oil filter or even a larger filter with higher flow, does not cause oil to build up inside the crankcase (sumping).
Sumping itself is a Oil scavenging (pickup and return) issue not a delivery issue.
One thing to note is that the oil pressure relief valve routes the oil flow back to the intake side and not the crankcase..
Seasoned HDF Member
Joined: May 2018
Posts: 5,814
Likes: 7,147
From: Las Vegas
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From: Montreal,Quebec,Canada
What engine do you have...??
The MoCo came out with a longer, larger filter in 5/2020 that is supposed to take into consideration the higher flow rate of the new M8 oil pump... It has 25% more surface area and is 4" long, compared to the older M8 & Twin Cam filter that is 3.5" long. It's #62700296 black finish, & #62700297 in chrome finish.
As far as I know, it looks the exact same except for the length and a red dot visible if you look into the filter, deep inside at the top. They are both 5 micron rated. The longer one has the same round holes and orange filter element. But... I haven't seen one since they first came out. Nor have I seen the regular, shorter filter (#63798-99A in chrome or #63731-99A in black) in several years.
Maybe they switched to the slotted holes... I have no idea...
I seriously doubt the MoCo would sell an oil filter that would hurt their engines... That would irritate the engineers AND make the bean counters look bad...
Regardless.... I switched several years ago to the HiFlo Filtro HF171RC filters.
HiFlo Filtro made the original K&N Harley oil filter with the 17mm nut on the end. They are the largest PowerSports filter manufacturer and the first to gain TUV certification. When K&N changed their oil filter manufacturer, they had several quality control issues pop up. That's when I learned about, and switched to HiFlo Filtro.. I have heard a rumor that after the quality control issues, K&N may be ordering their Harley oil filters from HiFlo Filtro again, but I haven't been able to confirm it.
HiFlo Filtro filters are available on Amazon.com for about $11 each. That's the HF171RC...
They make an HF171B (black, no nut) @ $10.00 on Amazon, HF171C (chrome, no nut) @ $13.00 on Amazon, HF171RB (black, w/17mm nut), and HF171RC (chrome, w/17mm nut) @ $11.94 on Amazon.
I've been using the HiFlo Filtro HF171RC on all my Harleys for about 6 years now...
The MoCo came out with a longer, larger filter in 5/2020 that is supposed to take into consideration the higher flow rate of the new M8 oil pump... It has 25% more surface area and is 4" long, compared to the older M8 & Twin Cam filter that is 3.5" long. It's #62700296 black finish, & #62700297 in chrome finish.
As far as I know, it looks the exact same except for the length and a red dot visible if you look into the filter, deep inside at the top. They are both 5 micron rated. The longer one has the same round holes and orange filter element. But... I haven't seen one since they first came out. Nor have I seen the regular, shorter filter (#63798-99A in chrome or #63731-99A in black) in several years.
Maybe they switched to the slotted holes... I have no idea...
I seriously doubt the MoCo would sell an oil filter that would hurt their engines... That would irritate the engineers AND make the bean counters look bad...
Regardless.... I switched several years ago to the HiFlo Filtro HF171RC filters.
HiFlo Filtro made the original K&N Harley oil filter with the 17mm nut on the end. They are the largest PowerSports filter manufacturer and the first to gain TUV certification. When K&N changed their oil filter manufacturer, they had several quality control issues pop up. That's when I learned about, and switched to HiFlo Filtro.. I have heard a rumor that after the quality control issues, K&N may be ordering their Harley oil filters from HiFlo Filtro again, but I haven't been able to confirm it.
HiFlo Filtro filters are available on Amazon.com for about $11 each. That's the HF171RC...
They make an HF171B (black, no nut) @ $10.00 on Amazon, HF171C (chrome, no nut) @ $13.00 on Amazon, HF171RB (black, w/17mm nut), and HF171RC (chrome, w/17mm nut) @ $11.94 on Amazon.
I've been using the HiFlo Filtro HF171RC on all my Harleys for about 6 years now...
http://www.hiflofiltro.com/catalogue/filter/HF171BRC
Available in Glossy Black (HF171BRC) and Chrome (HF171CRC) Finish
