Ducati Monster Forum

Moto Board => Tech => Topic started by: kostas_dark on December 20, 2011, 03:17:37 PM

Title: Oil leak rear cylinder
Post by: kostas_dark on December 20, 2011, 03:17:37 PM
Hi guyz....I m having a problem...one or the screws of the rear cylinder head is leaking oil..specifically the rear left screw (seated on the bike)...Does anyone know the nm i need to put on the wrench and the type of nut i need? torx or sth?

I have a monster 696
Title: Re: Oil leak rear cylinder
Post by: Howie on December 20, 2011, 03:32:15 PM
Still under warranty?  Take it to the dealer. 
Title: Re: Oil leak rear cylinder
Post by: kostas_dark on December 21, 2011, 08:49:08 AM
no warranty ended 6 months ago.
Title: Re: Oil leak rear cylinder
Post by: Howie on December 21, 2011, 09:36:28 AM
Are you talking about a valve cover?  A photo with the suspect screw and leakage would be helpful.
Title: Re: Oil leak rear cylinder
Post by: ducatiz on December 21, 2011, 10:01:44 AM
yeah sounds like a valve cover, but pics pls

the heads are secured to the case with 14mm nuts on a stud, not a torx or hex.
Title: Re: Oil leak rear cylinder
Post by: kostas_dark on December 22, 2011, 06:27:48 AM
no no it's not the valve cap..for sure..the valve cap is dry..the leak seams to be of the rear left nut or the washer which secures the cylinder head..sry for my english..
(http://img189.imageshack.us/img189/7339/tb640x4801.jpg)
Not actual photo
Title: Re: Oil leak rear cylinder
Post by: ducatiz on December 22, 2011, 06:34:00 AM
Quote from: kostas_dark on December 22, 2011, 06:27:48 AM
no no it's not the valve cap..for sure..the valve cap is dry..the leak seams to be of the rear left nut or the washer which secures the cylinder head..sry for my english..
(http://img189.imageshack.us/img189/7339/tb640x4801.jpg)
Not actual photo

the pic is too small, can you make a closeup photo of the leak itself??

it looks the arrows are pointing at the camshaft bearing cover but i can't tell
Title: Re: Oil leak rear cylinder
Post by: Raux on December 22, 2011, 06:54:13 AM
Bet its your cam cover
Title: Re: Oil leak rear cylinder
Post by: He Man on December 22, 2011, 07:49:56 AM
Quote from: Raux on December 22, 2011, 06:54:13 AM
Bet its your cam cover

what makes you say that? the fins could be excreting oil.  ;D


that is a problem spot on my bike (S2R1000) just cleaned the whole area, and cleaned the cover before reinstalling it. if it ideosnt work, im going to pick up a o ring for it and give that a try.
Title: Re: Oil leak rear cylinder
Post by: Cloner on December 22, 2011, 09:43:04 AM
On newer bikes Ducati use a twelve point nut for that fastener, don't they?  I think you'll find it's a 14mm, 12point (rather than the traditional 6 point).  Older ones are 15mm.

You'll need to buy/make/acquire a head nut tool to tighten it with a torque wrench, which is recommended occasionally, anyway.  The tool is a short bar (or cut wrench with a socket, or whatever you want to make) with a 12 point socket cut-out on one end and a squre cut-out for your ratchet on the other.  Like this:  http://www.motoreva.com/item.cfm?itemid=103&categoryid=171 (http://www.motoreva.com/item.cfm?itemid=103&categoryid=171)  If you make one from a box-end wrench, you'll probably have to grind it down a bit as they're generally too think in their stock configuration.  Most of the aftermarket bits are thin plates with laser cut or water jet cut features.

Often something else in the neighborhood is leaking and the oil just accumulates around this nut, though.  Look at the cam caps and valve covers, first.  They're easy to "fix" and more likely to leak.
Title: Re: Oil leak rear cylinder
Post by: DucatiKabul on December 22, 2011, 10:07:41 AM
I just got a 696 and noticed leaks around the same area you pointed AND on the horizontal cylinder as well (same area), my best bet is that it is the valve cover o-ring and read some posts people having same problem. I have ordered the 886.4.060.2A o ring for mine to replace the stock 886.4.060.1A. Seems to be a general problem and Ducati came up with a new ring to replace the original one.
Title: Re: Oil leak rear cylinder
Post by: ducatiz on December 22, 2011, 10:23:36 AM
Quote from: DucatiKabul on December 22, 2011, 10:07:41 AM
I just got a 696 and noticed leaks around the same area you pointed AND on the horizontal cylinder as well (same area), my best bet is that it is the valve cover o-ring and read some posts people having same problem. I have ordered the 886.4.060.2A o ring for mine to replace the stock 886.4.060.1A. Seems to be a general problem and Ducati came up with a new ring to replace the original one.


that's not a new design, that's a different supplier ID, likely the parts are identical
Title: Re: Oil leak rear cylinder
Post by: DucatiKabul on December 22, 2011, 10:31:04 AM
Cool!! I can see a belly pan on your bike, mine is black as well and really want to add a belly fairing, can you post a picture of your bike please?????? [thumbsup] [clap]


Quote from: kostas_dark on December 22, 2011, 06:27:48 AM
no no it's not the valve cap..for sure..the valve cap is dry..the leak seams to be of the rear left nut or the washer which secures the cylinder head..sry for my english..
(http://img189.imageshack.us/img189/7339/tb640x4801.jpg)
Not actual photo
Title: Re: Oil leak rear cylinder
Post by: He Man on December 22, 2011, 11:07:52 AM
 [bang] i just sliced mine in half. i took it apart last night to clean it, went for a ride today, its still leaking when i took it off i tried to lube the ring up, then as i installed it, i sliced it up. :( called ducati soho for the part, they are going to get back to me!
Title: Re: Oil leak rear cylinder
Post by: Dellikose on December 22, 2011, 11:23:29 AM
Quote from: He Man on December 22, 2011, 11:07:52 AM
[bang] i just sliced mine in half. i took it apart last night to clean it, went for a ride today, its still leaking when i took it off i tried to lube the ring up, then as i installed it, i sliced it up. :( called ducati soho for the part, they are going to get back to me!

You really are cursed...  :o
Title: Re: Oil leak rear cylinder
Post by: He Man on December 22, 2011, 11:27:31 AM
it was my own fault cause i didnt see that i pinched it.

ducsoho called back, they have 4 in stock! woo! only need 2
Title: Re: Oil leak rear cylinder
Post by: He Man on December 22, 2011, 01:42:39 PM
by the way the size of hte o ring is 44.12x 2.62
Title: Re: Oil leak rear cylinder
Post by: kostas_dark on December 22, 2011, 03:13:40 PM
Thanks for the responces....the photo is fixed..this bike is not mine...I just had it in my pc and it was easy to upload just to indicate the spot of the leak..
I'm sorry if I was misunderstood.
We have a really bad weather these days here so when I can I will check again..
I ll keep you posted..