Ruined cam - how?

[tanz45]

Bad cam bearings?

[Madd Maxx]

Coil bind or excessive spring pressure can cause that type of failure.

[farmtruc]

Coil bind or excessive spring pressure can cause that type of failure.

We replaced the lifter plastic guides too, just in case.

From the markings on the back, I can see it's a Torquer II cam, and it appears to have Patriot double springs, combination sounds about right.

We're installing an LS6 cam and new lifters for now, keeping the P springs.

I thought about excessive spring pressure as well, I thought about changing in the springs to a 918 or LS6 spring.

[carfreak07]

sure looks like some coil bind and lack of oil. What springs were on the heads? Just looks like there wasnt any lubrication and caused the lifter to turn sideways resulting in the roller breaking off. It is weird that all the rollers have some damage.......that is what leads me to believe it is a lubrication issue. Are the valves/pistons ok........maybe clearance issue?

Could be like RED said.....regrind cam....along with incorrect pushrods and coil binding. Let us know what you determine!