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I Think My Cam Is Cracked

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2K views 13 replies 6 participants last post by  ordinary builder  
#1 ·
It looks like I see hairline cracks in a couple of the lobes. They look like they form a web of small cracks on one of them. The cam has been run for a long time and is a solid roller. Is this a normal place for them to crack, or am I seeing something else? I figured they would be more likely to crack in the core itself rather than across the face of the lobe. Anyone had this problem? Thanks
 
Discussion starter · #6 ·
ordinary builder said:
are you referring to the horizontal lines that are in the area of where the lifter roller wheels are running....??

the indicated area is going to dig in to the surface and this is commonly due to the original cam core not being heat treated deep enough in comparison to the lobe shape that is being employed.

need a photo of the overall cam to know what the material was / is.
Click to expand...
Yes the lines on the lobe running across the surface the roller runs on. It is a Cam Motion stick. I only see this on two of the lobes the one pictured is the worse, the other one (not in the picture) you can barely make out the lines on it. I was wondering if it had something to do with heat treatment.
 
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