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Discussion Starter #1
Hi guys recently i've noticed some minor oil leakage from the oil filter.
first thing i did was remove it to inspect the gasket(gasket seems fine).
rode around for a week and today i went to look underneath expecting the area to be dry but i still found some oil around the filter area..

Next thing i tried was wiping it down i assumed the oil could be residual.

So i wiped it down and warmed the bike up and watched from underneath.
As expected oil from the filter seal BUT another problem. Oil is also coming from this gap around the filter seating area. I have no idea what its called and how it could be leaking from it. This is soo weird my plan was to just throw on an oem filter but now it seems like it's still going to leak from this gap. Any help or input would be really appreciated:)

I've linked an image of where the oil is coming from

https://drive.google.com/a/mini-box.com/file/d/0BwfO3AXgMA1VSEg0a1FjbmZRTnc/edit?usp=sharing
 

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The gap indicated by the arroez is the mating surfaces between the filter and the casing - this is where the filter seal is located. Tightening or replacing the filter should solve the problem there. If I look at the photo it looks as if there is a crack in the casing lower down?
 

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Well, it's not supposed to leak from there...

How tight did you do the filter up? did you lube the seal before putting it on?
 

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Discussion Starter #6
The gap indicated by the arroez is the mating surfaces between the filter and the casing - this is where the filter seal is located. Tightening or replacing the filter should solve the problem there. If I look at the photo it looks as if there is a crack in the casing lower down?
I just dont understand why the mating surface is two pieces? i saw a picture of another one and it didn't have two pieces to it.

https://drive.google.com/file/d/0BwfO3AXgMA1VQ1lIYlI4VW9scUU/edit?usp=sharing

As far as i know the crack is not actually a crack. no oil is coming out of it.

Well, it's not supposed to leak from there...

How tight did you do the filter up? did you lube the seal before putting it on?
Yea, i'm so out of ideas as how oil could be coming from there(if it actually is).
at first i did the filter hand tight. i noticed some oil coming out so i tightened it more with a socket and ratchet not too tight the leakage was less. I did make sure to lube the seal too..
 

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And did you make sure that the seal from the old filter came out? It wouldn't be the first time it's stuck to the bike and caused issues...

Only other thing I can think of is the boss protrusion. Should be between 16 and 17mm IIRC
 

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^^ The ring that you see is not actually 2 mating surhaces but actually the seam where the filter was crimped to close during manufacturing. Maybe the filter is leaking at the seam. I would suggest change the filter and while doing it make sure the sealing surface is clean and no marks or nicks on it.
 

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If I look at the photo it looks as if there is a crack in the casing lower down?
That's the first thing I noticed. Clean that area really good and keep your eye on it.

I did in fact try a K&N at one point and it also leaked so I just kept tightening it little by little until it stopped. When it was time to change it I had a hell of time removing it and the nut on the end started to spin. I had to get out the big pliers to get it off. It may have been a one in a million experience but it was enough for me to not go back to K&N. I went back to using the factory filter and tightening to factory specification, no problems with leakage after than and I've done quite a few oil changes since then.
 

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Discussion Starter #10
And did you make sure that the seal from the old filter came out? It wouldn't be the first time it's stuck to the bike and caused issues...

Only other thing I can think of is the boss protrusion. Should be between 16 and 17mm IIRC
Yup i made sure the mating surface was clear and there was no left over seal when i removed it to do the inspection.

Sorry, but what is the boss protrusion?
 

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Discussion Starter #11
^^ The ring that you see is not actually 2 mating surhaces but actually the seam where the filter was crimped to close during manufacturing. Maybe the filter is leaking at the seam. I would suggest change the filter and while doing it make sure the sealing surface is clean and no marks or nicks on it.
Hmm that makes me wonder now. because i'm assuming the silver part is not part of the filter but it could be. in this link it has a silver ring it could be the same as the filter i have.

http://nzairfilter.co.nz/oil-filter/kn-204.html

my next step is to pick up an oem filter and hopefully that solves the leaking.

That's the first thing I noticed. Clean that area really good and keep your eye on it.

I did in fact try a K&N at one point and it also leaked so I just kept tightening it little by little until it stopped. When it was time to change it I had a hell of time removing it and the nut on the end started to spin. I had to get out the big pliers to get it off. It may have been a one in a million experience but it was enough for me to not go back to K&N. I went back to using the factory filter and tightening to factory specification, no problems with leakage after than and I've done quite a few oil changes since then.
hopefully the oem filter does the trick! I'll pick one up tomorrow
 

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The boss is the thing the filter screws onto, if it's sticking out too far the filter can foul on it causing the seal to not be compressed properly.

I think your best way forward is to replace that filter with an OEM one and check that mating surface again.

If you can take a photo of it with the filter off that would also be good...
 

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Just be aware if you tighten the factory filter to the factory torques specification you may have problems removing it if you don't have a stout oil filter wrench.
 
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