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Discussion Starter · #1 ·
Hi friends, i came across this problem in my cbr while changing the oil filter in my bike. This was the first time i tried to change oil by myself.I found this crack inside the oil filter casing when trying to replace my filter.Mine is just a 2year old cbr running just 12000 km and maintaining correct service schedules through the Honda service centers until now.Need your help.Attaching the image
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Those marks may just be cosmetic - and not thorough cracks.

I've seen plenty of cast pieces with marks that look like cracks, but are strictly cosmetic.
 

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Discussion Starter · #6 ·
I hope it is only some cosmetic error.Going to Honda tomorrow to check it.Thanks you gave me some relief
 

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Do check, sometimes casting flaws will leave off excess trails like the one in the picture. From the image, I can see those cracks have emerged perpendicular to the oil filter bolt, probably over tightening could have cause mild stress cracks. Eitherway, if it's an casting flaw, you can buff it off, but if the cracks have crevices, then they are cracked, and it's better to replace the cover.

Cheers!
VJ
 
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Do check, sometimes casting flaws will leave off excess trails like the one in the picture. From the image, I can see those cracks have emerged perpendicular to the oil filter bolt, probably over tightening could have cause mild stress cracks. Eitherway, if it's an casting flaw, you can buff it off, but if the cracks have crevices, then they are cracked, and it's better to replace the cover.

Cheers!
VJ
It looks like only 1 of the cracks lines up with an oil filter cover bolt, The others are running off of indentations in the casting. Plus I find it VERY hard to believe that the notoriously brittle oil filter cover bolts would come even close to doing that kind of damage to the side cover without snapping off well before from being over-tightened. Those things routinely break just from using a torque wrench.
I wonder how many of us may have the same "flaw" in our side covers to varying degrees without really noticing it yet. I know I'm going to look closer on my next oil change. For all we know it could be a known issue at Honda, maybe cosmetic only and still well within tolerances for safe operation of the engine.
I hope the OP follows up with whatever info he can wrest from Honda. This "issue" really has me curious.
 

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It looks like only 1 of the cracks lines up with an oil filter cover bolt
To me, it does look like all the cracks(1-6), or whatever they are, do come out from the cover wall towards the center. At first I thought maybe the top "crack", marked(1) in picture
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, maybe it is a shadow from a side lighting, but the picture is really high quality (Akashsp was take a great picture! Thanks!!).
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At Zoom-In it does looks like a crack and not like a shadow.
In the next month I plan to disassemble my Filter-Cover, if that happens I will downloading to here a photo for reference.
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I'm also very curious to know what's going on there, especially because I personally have an oil leak from this area, the picture above: not strong leak, not dripping oil, but very wet.
 

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It looks like only 1 of the cracks lines up with an oil filter cover bolt, The others are running off of indentations in the casting. Plus I find it VERY hard to believe that the notoriously brittle oil filter cover bolts would come even close to doing that kind of damage to the side cover without snapping off well before from being over-tightened. Those things routinely break just from using a torque wrench.
I wonder how many of us may have the same "flaw" in our side covers to varying degrees without really noticing it yet. I know I'm going to look closer on my next oil change. For all we know it could be a known issue at Honda, maybe cosmetic only and still well within tolerances for safe operation of the engine.
I hope the OP follows up with whatever info he can wrest from Honda. This "issue" really has me curious.
If someone is doing an oil/filter change, maybe they could take a close look at their cover and let us know what it looks like. Posting a photo would help.

I'm pretty confident it's just normal casting flaws, but it would be beneficial to compare the OP's to others.
 

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If someone is doing an oil/filter change, maybe they could take a close look at their cover and let us know what it looks like. Posting a photo would help.

I'm pretty confident it's just normal casting flaws, but it would be beneficial to compare the OP's to others.
I agree it's likely "normal" (and has probably been present in CBR side cover castings for years), but it would be interesting to discover how prevalent it is. Most of us are too preoccupied making sure we don't install the filter backwards to notice any tiny cracks in the filter housing. Also it's not something you "expect" to see, so that plays a part as well (as any rider who's been cut off by an inattentive driver knows.)
I'm on a fresh oil change for the start of the riding season here in the Northeast (YAY 😁), but I'll be sure to report anything spotted on my next one. I hope others do too.
 

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I'm pretty confident it's just normal casting flaws
You convinced me, then I lost my confidence, I wish that our friend have a normal part with normal casting flaws as in these pictures:
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In the coming month I am expected to open the filter cover, as it will happen, of course I will be happy to share photos.
 

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To reference, published today in Partzilla YouTube channel.
Starts at 1:12
There we can see a normal aluminum casting at the filter housing (CBR300R).
 

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If someone is doing an oil/filter change, maybe they could take a close look at their cover and let us know what it looks like. Posting a photo would help.
From Today.
If I had not been looking for "cracks" there is no way I would have suspected anything.
From a distance of about half a meter the surface looks shiny and smooth. Looking closely, I checked with my eyes, And by touching it. What I was seeing and feeling are not a cracks. The black line is a shadow from my lighting. It's a line that slightly higher up during casting the aluminum.
The photos for your judgment:
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