Cam lobe discoloration normal?

Using your last (bottom) picture as an example you can clearly see the thin line around the base circle. That is perfectly normal for a hydraulic lifter.

The two lobes with the nose showing look normal too, but it’s interesting to note that as the cam wears in over the nose that shiny area over the nose will get to be as wide as the lobe. That’s normal too.

I’d send it and not lose any sleep.


Yeah its weird, with the light directly on them they just look polished but any light at a angle and they have a blue hue to them, it does appear to look a lot more blue with the led lights vs the regular drop light