Well, if the design was for a concave end plate, there are likely other applications which rely on that design. Back in post 49 Radiummadman mentions that there is a filter with a different part number which looks the same except that it has a convex end cap. It seems likely that the parts got mislabeled somewhere along the manufacturing and packaging process.And why would Bosch care about us using a filter not designed for our application?
I found a Bosch 3323 which is convex and has the orange Nitrile ADBV. Yes, so Bosch REALLY screwed the pooch on this one. I won't be buying anymore Bosch filters either. Fortunately I have a good stock of the old Bosch 3323s.
I'm still amazed that the OP painted an oil filter black. I thought I was OCD...Love this place.
Hilarious phone call "transcriptions" and comparative close-up photos of oil filters. Same topic. Y'all crack me up.
I was at AutoZone today picking up oil & filter for the wife's Mazda. I've always used Bosch 3330 filters on it. Always. Remembering this thread I checked but every box had the convex filter. Would it leak? Dunno but I decided not to chance it. So I checked the M1-102 equivalent and lo & behold 2 were concave and 2 were convex. Called the manager over, showed him both the Bosch and M1's, and asked him why the difference and wouldn't the convex one leak? He did a quick check and got my phone#, said he's gonna see what he can find out.I had just placed an order with amazon for a pair. Not knowing what I would get, I cancelled it and went with a mobil 1 filter. With the purolator filter that is on it now, it's the only thing I can see when I look at that side of the bike now.
Sneaky rascalsI now believe Yamaha has planted a saboteur in several filter manufacturing facilities for the purpose of convincing us only the OEM filters are safe.It's working. I bet Yamaha's filter sales triple this year.
Bumping this slightly dated thread. I grabbed a 3323 at Autozone, spun it on last night, I could tell it was effed. Looked at the shape compared to the pull-off 3323, and it's what you see above. Took the new one back, found one with the right shape, exchanged, screwed it on and all is well--slowly bottomed out then torqued on as it should. The 'bad style' ones are either still out there or just a new design they're going with that I'm guessing does not seal well on the bike.
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