Leaking cylinder head (pictures) - Ducati Monster Forums: Ducati Monster Motorcycle Forum
Reply
 
Thread Tools Display Modes
post #1 of 12 (permalink) Old 01-15-2006, 04:52 PM Thread Starter
Senior Member

 
Join Date: Feb 2005
Posts: 539
Leaking cylinder head (pictures)

I found my oil leak.... turns out it was a bit of a bigger problem

[img width=600 height=450]http://www.kilburn.nl/monsterblog/images/klep_koplek.jpg[/img]

[img width=600 height=450]http://www.kilburn.nl/monsterblog/images/lek_cylinder.jpg[/img]

You can see where the gasses have been blowing by. The surfaces feel really smooth and undamaged, could uneven tightening be the cause? What is the best way to fix this, a thin gasket? Or just clean and reassemble?

tia, Peter

Ducati ST2 to 944ie FrankenMonster, '96 Monster 600 (sold), '00 Alfa Romeo 156, '74 Series 3 Landrover
opwierde is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old 01-15-2006, 05:00 PM
Senior Member


 
ducman851's Avatar
 
Join Date: Jan 2003
Posts: 6,266
Re: Leaking cylinder head (pictures)

As youve realized there is no head gasket on the air cooled bikes. Id clean the surfaces up really well, replace the orings and properly torque them upon installation.

I supposed a loose or fastenter that wasnt up to proper torque could have caused this, You may want to check the cylinder itself for flatness with a straightedge.

Yep, Im probably that guy.<br /><br />If needed I can be reached at&nbsp; Ducman851@Yahoo.Com<br /><br /><br /><br /><br /><br /><br /><br />Its been fun kids.
ducman851 is offline  
post #3 of 12 (permalink) Old 01-15-2006, 05:14 PM Thread Starter
Senior Member

 
Join Date: Feb 2005
Posts: 539
Re: Leaking cylinder head (pictures)

Look again... it's water cooled
It's a ST2 engine, 2 valves, with a bit higher compression and 44cc more than a Monster 900 engine. I guess Ducati decided that it ran too hot for air cooling.
Thanks for the quick reply. The four head bolts were nice and tight (I had to hit them quite hard). I'll try to borrow a straightedge and check.

Ducati ST2 to 944ie FrankenMonster, '96 Monster 600 (sold), '00 Alfa Romeo 156, '74 Series 3 Landrover
opwierde is offline  
post #4 of 12 (permalink) Old 01-15-2006, 05:16 PM
Senior Member

 
Join Date: Feb 2005
Posts: 555
Re: Leaking cylinder head (pictures)

be sure to lap the cylinder to the head also .
the 2valve liquid cooled bikes were prone to leaking above the exhaust port (like yours).
somwetimes just keeping the rea cleen is the best you can do.
good luck
ducvet is offline  
post #5 of 12 (permalink) Old 01-15-2006, 06:43 PM
Senior Member


 
ducman851's Avatar
 
Join Date: Jan 2003
Posts: 6,266
Re: Leaking cylinder head (pictures)

[quote=opwierde ]
Look again... it's water cooled

Yep, Im probably that guy.<br /><br />If needed I can be reached at&nbsp; Ducman851@Yahoo.Com<br /><br /><br /><br /><br /><br /><br /><br />Its been fun kids.
ducman851 is offline  
post #6 of 12 (permalink) Old 01-16-2006, 04:34 AM
Junior Member

 
Join Date: Jan 2006
Posts: 5
Re: Leaking cylinder head (pictures)

Just want add my 2 cents worth, It is obviously not the first time the head was off. Around those 2 green O rings looks like the leak (are those O ring a genuine part) is the worst. Incorrect torque procedure could warp the head and the point about the O rings was if they were not genuine they could be a wisker bigger/smaller thus coursing this problem. As the other guys said put a staight edge on it. Then again the head is not that big it could be hard to pick up without good quality measuring gear, end it needs to be with in a few thou of an inch because it has no gasket.

That was a lot for 2 cents. Mark
mark.Aust. is offline  
post #7 of 12 (permalink) Old 01-16-2006, 07:55 AM
Senior Member


 
ducman851's Avatar
 
Join Date: Jan 2003
Posts: 6,266
Re: Leaking cylinder head (pictures)

Ya know I went back and looked at the parts fiche for the ST2 and still stand by what I said. They still have no gasket at the head other than the 4 orings.

Yep, Im probably that guy.<br /><br />If needed I can be reached at&nbsp; Ducman851@Yahoo.Com<br /><br /><br /><br /><br /><br /><br /><br />Its been fun kids.
ducman851 is offline  
post #8 of 12 (permalink) Old 01-16-2006, 04:29 PM Thread Starter
Senior Member

 
Join Date: Feb 2005
Posts: 539
Re: Leaking cylinder head (pictures)

Thanks for all the good advice!
I'll check for straitness and lap the head to the cylinder. I'll have to remove the cylinder for that and replace the base gasket as well.... The whole engine has been disassembled at least once to my knowledge, a cracked engine case thanks to a broken engine bolt. The green O-rings are standard Ducati, at least they are at the moment. My replacement set is green as well.

Ducati ST2 to 944ie FrankenMonster, '96 Monster 600 (sold), '00 Alfa Romeo 156, '74 Series 3 Landrover
opwierde is offline  
post #9 of 12 (permalink) Old 01-17-2006, 03:28 PM
Senior Member

 
Join Date: Feb 2005
Posts: 246
Re: Leaking cylinder head (pictures)

How do you lap the head to the cylinder?
Tornado-rider is offline  
post #10 of 12 (permalink) Old 01-17-2006, 03:53 PM Thread Starter
Senior Member

 
Join Date: Feb 2005
Posts: 539
Re: Leaking cylinder head (pictures)

I'll talk to my local Ducati specialist first to be sure but I expect to use grinding paste on the mating surfaces of head and cylinder and grind/rotate them untill I have an even surface all round. Sort of like grinding valves. If the irregularities are too deep for grinding paste then it will need machining first. I checked the cylinder head for straightness, no problem there.

Ducati ST2 to 944ie FrankenMonster, '96 Monster 600 (sold), '00 Alfa Romeo 156, '74 Series 3 Landrover
opwierde is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ducati Monster Forums: Ducati Monster Motorcycle Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome