Different failure mode rocker arm

Hello Aspen,

Here is how I do it!

I start my post just like you did, and then go to my file locker. There I open the file I want to include in the post and copy the URL it opens with (at the top of your browser) and then paste the URL into the into the post.

Works every time for me. Besides I want to see the picture of the rocker arm!

Regards,

Joe

hi aspen,

I fixed your link and resized and replaced your picture so it wouldn't stretch the page.

File association on the server is case sensitive, meaning:

rockerandpin.jpg

IS NOT THE SAME AS:

rockerandpin.JPG

That was your problem.

thanks,
json

Hi Peter,

There's no set requirement on sizes, but to keep the members from having to scroll to read the text, I try to cut out any unneeded parts of the picture, and resize as small as I can while keeping the important part of the image easily viewable.

I tried your photo at 500 pixels wide(which doesn't stretch the frames), but it was then hard to see the break in the rocker arm.

I leave it to your discretion to size the images, so if you need a larger image to make your point, then by all means keep it large

thanks,
json

Hello Aspen,

Welcome to the show!

Man, that is a nasty break. If I were you, I would pull the head to make sure you don't have a bent valve. There is a chance... Let us hope there is not.

As for the break. It is in an interesting location. Maybe more of the more experienced persons could chime in to say if they have seen a break there before.

But, looking at it, it looks bizzarre to have broken there. If you notice, the break is definately normal to the rocker pin axis, which makes sense. But the thing that is baffling me is that it did not break where there is less metal. I would almost expect it to break 180 degrees from that location. And, only one side broke, which also is not necessarily too surprising. I'm not sure if you are able to get another picture of it even closer? A really good camera could do that. Also, the break does not look like it is opposite from where the cam would engage the rocker roller. Are there any wear marks that would lead you to believe that the rocker spun? Actually, now that I am looking and thinking about it, my guess is as follows. It is the 5sigma rocker. Meaning, you got one that has the smallest tolerance size (diameter) on the hole, and the largest tolerance size (diameter) on the shaft. This would lead to a heavy press fit, which might cause this type of failure. Other than that, it could alse be an inclusion in the casting, meaning something other than steel is in there, which is bad.

You said it sounded fine from the time of purchase for the first 5 hours? I would see if you couldn't get that warranteed or something. Seems like something that should not happen, given the fact that it was replaced within the recommended time.

-Parsko

parsko

there is no possible way that the valve could have hit the piston or indeed the opposite valve with this problem. he can replace the rocker with the utmost confidence.

regards

Taffy

Touche, Taffy. My gut would agree with you. My paranoiya wouldn't. You are right though, the valves are pretty tough. I would agree with you then.

-Parsko

Re cam

I think you have to contact Dale Lineaweaver for these LX camshafts, i think he does them as an exchange????

I've got a very good condition 55 that i took out of my 470 if you're interested.

Chris

live to ride!

hi again Aspen,

Dale is out of the office for another 8 days, so if you need one in 24 hours, then indeed you'll need to find another source.

Sorry, but like you said maybe later. When and if you do finally get one installed, you'll be a very happy camper

thanks,
json

Hi Aspen,

Save your damaged cam, as Dale can use it to fashon the LXR2 for you. Provide a picture of the cam damage, in case it is too badly damaged to use as a core.

As to the rocker arm, if you know of folks who work in metalurgy, they may be able to determine if it had a structural flaw. If it did, maybe 'Mother' will cover the costs of replacement hardware.

LOL

Regards,

Joe

aspen

am i right in thinking that the 08 cam now has a part # that finishes with the # '000'?

dale will be quite a while-like 4 week turnaround if not longer.

i think you're going at this one completely off-tilt! you had a rocker failure which is very, very rare so deal with it as such :?

new rocker and follower and buy the 55 cam.

you'll have it within the week and then you're out and about again!

the 55 is the correct cam for the 501 so it's like-you know!- your DESTINY

regards

taffy

turnaround

Hi Aspen,

I've not found the thread, but someone recently picked one up from him and had it in under two weeks.

I don't know if there's any special circumstances that would change that, but that's what I recall it always being.

thanks,
json