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Wethead cam wear issue.

PostPosted: Sat Mar 26, 2022 5:38 pm
by JimVonBaden
Helped a friend, Ed, with his GS. Both intake cams were starting to eat themselves. Small ridges on them, and the hardened surface was delaminating.

Swapped out both intake cams and checked the valve clearances, in spec. I also did the can timing check and adjust while I was there. Goth it in tope dead center, locked the motor and pulled it apart.

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Once done we changed the oil and lubed the rear splines at the final drive.

Re: Wethead cam wear issue.

PostPosted: Sun Mar 27, 2022 9:05 am
by HMF
Those cams do not look good.
Is the delamination a common problem and does the rust on what looks like a non-wear surface indicate a problem elsewhere?
How many miles on that bike?

Re: Wethead cam wear issue.

PostPosted: Mon Mar 28, 2022 10:32 am
by JimVonBaden
HMF wrote:Those cams do not look good.
Is the delamination a common problem and does the rust on what looks like a non-wear surface indicate a problem elsewhere?
How many miles on that bike?

59K miles on it. Not a very common issue, but not unheard of. Speculation is that the rust is in the areas where improper hardening is, since there is no rust on anything else.

Re: Wethead cam wear issue.

PostPosted: Mon Mar 28, 2022 1:55 pm
by bdimon
BMW should be offering to do a warranty repair even though the 3-year, 36,000-mile warranty is expired. 59,000 miles is far too soon for this to happen. Very discouraging.

Re: Wethead cam wear issue.

PostPosted: Mon Mar 28, 2022 2:03 pm
by eap
What could be better than a friend in need? Well, how about a friend in need that is a mechanical master like JVB. Thanks Jim for getting me back on the road, awesome as usual watching and learning from the expert!