The Spares Company
Club Shop/Regalia
Parent Website
Contact Officials
Machine Registrar
Club Secretary
Membership Secretaries
MPH Editor and Forum Administrator.
Section Newsletters
Technical Databases
Photos
Home
What's new
Latest activity
Forums
New posts
What's new
New posts
Latest activity
Information
Bike Modifications
Machine Data Services
Manufacturers Manuals
Spare Parts Listings
Technical Diagrams
Whitakerpedia (Vincent Wiki)
The Club
MPH Material Archive
Flogger's Corner
Obituaries
VOC Sections
Local Sections
Local Section Newsletters
Miscellaneous
Club Assets
Club History
Club Rules
Machine Data Services
Meeting Documents
Miscellaneous
Essential Reading
Magazine/Newspaper Articles/Letters
Adverts and Sales Brochures
The Mighty Garage Videos
Bikes For Sale (Spares Company)
Log in
Register
What's new
New posts
Menu
Log in
Register
Install the app
Install
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Persistent oil leak
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="998cc" data-source="post: 120143" data-attributes="member: 125"><p>Good day all. </p><p>After this last build (2017-2018), I have a great running Black Shadow that has a persistent oil leak. Prior to today, it seemed to be coming from the front exhaust port, so I just finished installing sealed lower valve guides, re-cut the valve seats and installed a PCV breather at the front exhaust valve spring cap. I took the bike out for about 20 miles this morning, and it is a pleasure to ride. However the leak is still there and is so bad, it covered the front of the engine with oil which also made its way to the rear tire (tyre). </p><p></p><p>After this morning's ride, I parked the bike on the driveway and observed the engine for about 15 minutes while idling. The oil just seems to appear under the front exhaust port on the cylinder muff about three fins down from the head joint. It also appears on the next three fins down and then drips onto the front of the engine. </p><p></p><p>Pressurizing the case to a few psi yielded no leaks while applying soapy water from a spray bottle to the entire engine. That was a last ditch effort! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite5" alt=":confused:" title="Confused :confused:" loading="lazy" data-shortname=":confused:" /></p><p></p><p>In KTB, E. M. G. Stevens advises to apply Wellseal to the right rear head bolt of each cylinder where these thread into the case. I did seal these some 40 years ago and have had no trouble. Could this now be the culprit? Hoping there is other wisdom here as I'd rather avoid pulling the top end again.</p><p></p><p>Thanks.</p><p>Regards,</p><p>Russ </p><p>998cc</p></blockquote><p></p>
[QUOTE="998cc, post: 120143, member: 125"] Good day all. After this last build (2017-2018), I have a great running Black Shadow that has a persistent oil leak. Prior to today, it seemed to be coming from the front exhaust port, so I just finished installing sealed lower valve guides, re-cut the valve seats and installed a PCV breather at the front exhaust valve spring cap. I took the bike out for about 20 miles this morning, and it is a pleasure to ride. However the leak is still there and is so bad, it covered the front of the engine with oil which also made its way to the rear tire (tyre). After this morning's ride, I parked the bike on the driveway and observed the engine for about 15 minutes while idling. The oil just seems to appear under the front exhaust port on the cylinder muff about three fins down from the head joint. It also appears on the next three fins down and then drips onto the front of the engine. Pressurizing the case to a few psi yielded no leaks while applying soapy water from a spray bottle to the entire engine. That was a last ditch effort! :confused: In KTB, E. M. G. Stevens advises to apply Wellseal to the right rear head bolt of each cylinder where these thread into the case. I did seal these some 40 years ago and have had no trouble. Could this now be the culprit? Hoping there is other wisdom here as I'd rather avoid pulling the top end again. Thanks. Regards, Russ 998cc [/QUOTE]
Insert quotes…
Verification
The Series 'A' Rapide was known as the '********' Nightmare?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Persistent oil leak
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top