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New Spec Triumph Bonneville Cam Cover Gasket

21K views 27 replies 18 participants last post by  Forchetto 
#1 ·
So I had my 2010 Bonnie go through a warranty fix for a weeping cam cover gasket. The new gasket the dealer installed looked slightly different than the original one that was on my bike. The new gasket (#T1260904) has a lip that cups around the outside of the cylinder head and appears to be made of a softer material than the previous gasket. Since I didn't do the install, I couldn't see if there is any difference on the inside of the gasket. Hope this new gasket would improve the oil sealing properties of the Bonnie cam cover.
 
#2 ·
Thanks for that. It now looks as if both components responsible for the tiresome leaks reported from the cam cover have been updated and presumably improved.

These are the items to look out for if you are plagued by leaks:

The Sealing washer T1260337 rather than the old T1260309.

The Cam cover gasket T1260904 rather than the old T1260900
 
#4 ·
am i to take it that the new washers and gasket will work with older bonnies? specifically, am 08 t100?
 
#6 ·
cool. that is good news. i have ignored my pesky cam cover leak for quite awhile, but was recently thinking about biting the bullet and getting it fixed. nice to know that triumph has finally got off their butt and fixed the cam cover gasket problem. -keith
 
#10 · (Edited)
All this is just conjecture at the moment. Data gathered as we go along.

I would imagine the dealers will get a Service bulletin or at least a web address where they can check to see if the bike they're about to service is subject to any changes.

Wouldn't it be nice if someone in the know from the factory was seconded here for a few hours each month to answer all sorts of questions, eh?.

Forums such as this do a lot for them, sales, loyalty, etc and we can't even share an out of date electronic file of a service manual that has been superceded by a new edition...:( Pathetic.

And yet you can go to project www.gutenberg.org and download War and Peace for free for your Kindle electronic book.
http://www.triumphrat.net/www.gutenberg.org
 
#11 ·
Had a weeping camcover and brought my Bonnie in yesterday. Told the dealer I heard there was a new gasket for the Bonneville which he could confirm after checking with Triumph. But Triumph states that the new gasket is only for more recent Bonnevilles (don't know from wich engine number - not my 2010), so the dealer deduced there must be a (minor) change in the camcover... I'm getting the 'old' gasket, I'm confident this will stop the weeping.

Greetings.
 
#12 ·
Interesting. They might have made the joint face a little wider, this would help with leaks.

This is all speculation though, like lots of other things. Surely this forum has enough clout with Triumph to be able to obtain some reliable data from them.

After all this leaking business is THEIR problem, not ours. A little technical explanation from one of their technicians as to the causes and cures wouldn't come amiss.
 
#14 ·
I talked to a technician at a nearby dealer. He said they have been using extra washers on top of the rubber ones. Didn't seem to know about any new spec washers or seals. One thing he did say that was interesting - on the powder coated covers sometimes the powder coat causes an uneven edge on the bottom of the cover. He suggested carefully sanding the powder coat off of the edge.
 
#20 ·
The true

The old style cam cover, cam cover gasket and cam cover seals are use up to engine number 456551 for the entire classic model lineup.(2001-2009).
The new cam cover, cam cover gasket and cam cover seals goes from engine number 456552 for the entire classic model line up( 2009 to present).
 
#21 ·
The old style cam cover, cam cover gasket and cam cover seals are use up to engine number 456551 for the entire classic model lineup.(2001-2009).
The new cam cover, cam cover gasket and cam cover seals goes from engine number 456552 for the entire classic model line up( 2009 to present).
It seems they've changed the bolts in addition to the Cam cover, seals & gasket:-

http://www.worldoftriumph.com/triumph_motorcycle_parts_locator.php?block_01=&block_02=100055005-2-2&block_03=610610

Bonneville & SE EFI > Eng No 456551

SPARES KIT CAM COVER BLACK Triumph Motorcycle Part Number T1260912

BOLT, SHLD, TX, M6X24.95, SLV Triumph Motorcycle Part Number: T3332052

SEAL,CAM COVER Triumph Motorcycle Part Number: T1260309

SEAL.CAM COVER Triumph Motorcycle Part Number: T1260900


Bonneville & SE EFI Eng No 456552 >

COVER CAM CRKL BLACK LINISHED Triumph Motorcycle Part Number T1261923

BOLT, SHLD, TX, M6X24.95, SLV Triumph Motorcycle Part Number: T3332051

SEAL CAM COVER SCREW Triumph Motorcycle Part Number T1260337

SEAL CAM COVER Triumph Motorcycle Part Number T1263333
Interestingly, being ignorant of the cam cover and bolt changes, I've used the new gasket & seals on my 2008 T100 without any problem whatsoever so the changes to those items must be very subtle.
 
#23 ·
I had a weepy cam cover, so I ordered a new one from Hermys. Also bought new washers, installed and torqued to specs, good to go. Not sure if it is the old or the new, but it doesn't leak anymore. This was about 3 months ago.
 
#25 · (Edited)
We'll FYI, I used the listed newer parts numbers as listed near the beginning of this thread and did this to my 2005 thruxton. Works great no weepage. I torqued the four cover bolts to 12 NM which is the middle of what the Haynes manual lists at 10 NM and the new updated value if 14 NM I heard about here.

Also used the British Customs AI Delete kit at the same time.

Both things were pretty simple for me who barely turns a screwdriver. I don't know what we did before YouTube. I like Delboys Garage series, pretty down to earth knowledge he passes on with an English flair. I chuckle every time he says "spanner" ...
 
#27 ·
This is killing me. :) I literally went to my loathesome area Triumph dealer yesterday to procure a valve cover gasket, and now this thread shows up and I simply cannot make heads or tails of whether or not I have the right bloody gasket.

My scenario is this: I have a 2007 T-100 w/ the chrome valve cover on it (put on by the last owner). The dealer gave me a #900 gasket without knowing that I had the chrome valve cover. Should I infer from what I've read here that I should now go back to them and request a #904 gasket to compliment this valve cover?

Your collective insights, as always, are appreciated.

Sent from Motorcycle.com Free App
 
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