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Discussion Starter · #1 ·
This is the horizontal cylinder on my 2009 848. Look at the brown object in the mirror next to the arrow... is this an oil seal that has popped out?

Before my last track day I noticed a small pool (1-2 ounces), of oil in my belly pan. I thought the valve cover gasket may have gotten twisted at the shop that completed my last timing belt renewal and valve check (a few hundred miles ago). So today I removed the cover, cleaned it up , renewed the liquid gasket in the corners (per the service manual), and reinstalled it. The leak persisted, and in my research I discovered that it could be a cam oil seal that has popped out. When it was in the shop, they shimmed up the exhaust valves on this cylinder.

Thanks in advance for any feedback!
 

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Discussion Starter · #5 ·
More like; they didn't put back in correctly.

If you remove the cam pulley, you probably be able to push it back in place.

Thank you, Dutch. This sounds easy enough. I have not yet worked on this part of my bike, so for special tools, these are the only two I need to remove the pulley, right?
 

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Court Jester
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Thank you, Dutch. This sounds easy enough. I have not yet worked on this part of my bike, so for special tools, these are the only two I need to remove the pulley, right?
I do not think you need to remove the pulley nor will it help. Pull the cover off, remove belt, pull the cam out reposition the seal put it all back together. I've had my cams out so many times on valve adjustments I can do it with my eyes close :(

The seal slides on the cam just need it in the right position when you set the cam in and put the cover on.
 
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Court Jester
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It can be done in several ways.

But seeing at your first picture, you already popped the cylinder cover and drained the oil?

Didn't notice that before, saves you some trouble and time.

So what Tchase said is also a option, but depends on what you prefer.

Just be careful with the shims. Don't loose/drop them. ;)

The tools you showed will do the trick, but you will need to replace the slotted nut when you do it the way I mentioned.

Another option would be; leave everything in place and push it back in place by hand or some other tool that could do the trick.

Be careful not to puncture the seal.
I'm just not sure he can push it into position with the cam torqued down?
 

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Court Jester
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Nevermind your pics show you can, I'd just remove the cover, would be easier than pulling the gear off IMO, you don't have to drain the oil just prep for some to leak out.
 

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Court Jester
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Charles I do not think removing the gear is "doing it right" I'm not sure what advantage it gains you unless my memory is completely failing me it fits I between the cover and the machined surface. Maybe some one else will chime in but when I did my valves I never removed the gear I just made sure the seal was in the proper position when I closed it all up.
 

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^ that's how i did it on my 1198 as well. if it's on the horizontal only then you might save time by not having to redo the belt tensioning. of course the vertical head will require the tank to be removed etc so removing the pulley might be the easier on the vertical. that said if it was me i would probably pull everything to make sure there is nothing else going on.
 

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Discussion Starter · #14 ·
Unless I'm missing something, it seems that the belt and gear both need to come off because the seal is so close to the inside of the gear (see addl pic below); I'm not certain how I could push it back in to place without removing these two items. Open to suggestions...



.
 

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Discussion Starter · #15 ·
^ that's how i did it on my 1198 as well. if it's on the horizontal only then you might save time by not having to redo the belt tensioning. of course the vertical head will require the tank to be removed etc so removing the pulley might be the easier on the vertical. that said if it was me i would probably pull everything to make sure there is nothing else going on.

Yeah, I probably should pull everything to have a closer look at this point. I have a pretty intense couple of weeks coming up, so this project will have to wait. I'll come back and let you all know how it goes...
 

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Yeah, I probably should pull everything to have a closer look at this point. I have a pretty intense couple of weeks coming up, so this project will have to wait. I'll come back and let you all know how it goes...
This is what you will be looking at
 

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See the bottom seal, I do not think just pushing it back would be the correct way. I make sure it lines up putting the entire cam assembly (gear attached) in.
 

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Discussion Starter · #18 ·
See the bottom seal, I do not think just pushing it back would be the correct way. I make sure it lines up putting the entire cam assembly (gear attached) in.
Thanks T--I decided the only way to salvage my last track day (scheduled for tomorrow), would be to take it in and let one of my local dealers help fix it. They took me in as a last minute appointment and all is well now. They replaced the seal and the castle nut. I guess I'll get to experience this myself the next time. I'm going to go ahead and get the tools so I'll be ready the next time!

Thanks again for all of the replies.
 
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