Oil leak 67 350 Sebring

jbarneshb · Post by **jbarneshb** » Sun Dec 21, 2008 1:24 pm

I'm getting oil coming out behind the drive sprocket. There doesn't appear to be a seal on this shaft just some threads on the outside of the sprocket that seem to be for directing the oil back into the engine. Any advice? Thanks

Chris Bushell · Post by **Chris Bushell** » Mon Dec 22, 2008 10:47 am

Has it just suddenly started doing it? has the bike been stood for a while?

Most likely cause is excessive crankcase pressure.

Easiest fix is take the sprocket off and refit with plenty of silicone on the splines.

jbarneshb · Post by **jbarneshb** » Mon Dec 22, 2008 6:07 pm

It's been out of operation for a year +. I bought it and did a cosmetic restoration on it after checking it out mechanically and running it but not long enough for it to show the leak. It has a new oversize piston in good shape and it doesn't seem to have any restriction on the breather. I'll try the silicone on the spline. Thanks

Chris Bushell · Post by **Chris Bushell** » Tue Dec 23, 2008 9:05 am

Do try the compression though, if it has been stood for some time there is a chance that the rings might be stuck.

Chris

Eldert · Post by **Eldert** » Tue Dec 23, 2008 10:14 am

you are correct that there is no seal . there should be a sealed bearing
at the outputshaft . a lot of times a zz type bearing is fitted that is with
a metal shield doing the sealing . a 2RS type bearing would be better
it has a rubber shield on both sides .
unfortionally you have to split the crankcase to replace this bearing
would be a good thing to clean the sludgetrap in the crank flywheel and
check if there is no sludge in the bigendpin .
a lot of bigend assemblys died because lack of oil due to plugged oilholes
in the bigendpin

Regards Eldert

bobnorton · Post by **bobnorton** » Thu Dec 25, 2008 3:45 pm

Hi Eldert, Reading through old service articles they reccomend removing head and barrel to clean out flywheel trap, is this a practical method??.

Eldert · Post by **Eldert** » Fri Dec 26, 2008 3:22 am

Hi Bob

not really , Ducati used a slotted screw for the sludgetrap so you have to
use a impact screwdriver to remove and install
it would have been easyer if they used a plug with a inside hexagon then
you could remove the plug with a allen wrench

Regards Eldert

nottonight68 · Post by **nottonight68** » Fri Dec 26, 2008 3:35 am

relevance-sludge traps have little to do with countershaft sprockets-this sounds like an interesting new thread-please elaborate

Eldert · Post by **Eldert** » Fri Dec 26, 2008 8:27 am

jads · Post by **jads** » Sat Dec 27, 2008 5:56 am

i too would be interested in info on sludge traps;my motor is a twin but you seem to have knowledge about all ducatis
i am putting a 750 motor back together and was unaware of these traps.
any info would be good-perhaps we transfer to a twins area?
ta jads

Eldert · Post by **Eldert** » Sat Dec 27, 2008 7:10 am

Hi Jads
yes a twin has sludge traps to . Richard Kennedy aka Richo Roundcase
has a very nice site about the restoration of his 750 GT
if you click on this link you see the sludge trap in the lh flywheel

http://people.aapt.net.au/~arkay/ducati/Crankshaft.html

Eldert

jads · Post by **jads** » Mon Dec 29, 2008 1:34 am

thanks -very informative.looks like a big/wide screwdriver would be needed.would you loctite these in after cleaning?-when cleaning,what stops rubbish going into big end
allen key screw is obvious-does no one make these
thanks jads

nottonight68 · Post by **nottonight68** » Tue Dec 30, 2008 1:56 am

Eldert wrote:who the hell made you moderator ? i am just answering a question
i am not the one polluting this forum with 4 plus messages a day of witch
90 % is plain a bullshit .
this is a forum for people that love Ducati singles and twins
if you have to much time on hands find a nice BS forum

Eldert

no i have a personality unlike you

jads · Post by **jads** » Tue Dec 30, 2008 2:04 am

+1 on that.i'd rather hear a bit of personal stuff ,than just robotic answers and links to other sites-we're on the net you know

leoleo · Post by **leoleo** » Tue Dec 30, 2008 2:12 am

+2-if you bother to read those posts you'll see 90 % BS is only your opinion-others may think that of yours-its all relative-life is to short to be so serious