Crane Roller Lifters OH NO!

yellow rose said

Uhhhhh, wait a second. From the pictures it looks like that cam is ground on a cast core. I very rarely run a sold roller on a cast core.

I’m not so sure that’s a lifter failure. It’s possible the cam started to fail and the lifter failure is a by product of that.

Even if it’s a steel core, I’m not so sure the cam didn’t fail first, for whatever reason.

Usually (I say usually because nothing is 100%) when a lifter fails, you see some heat in the lobe and on the wheel.

Also, any chance you can post a picture of the lifters not in the block?

TIA
YR

Click to expand...

Regrind of a stock hyd roller cam. Cam still in block, but from what I can see, all of the other lobes are in great shape.

I can't tell for sure until the block is out and the head off but Brian and I both did a wiggle test with an old hyd lifter, and the #4 lifter bore "seems" looser than the others. It could be my imagination or the way we have to lean over the fenders, but it feels like there is more clearance in the bank to bank direction than the fore and aft. Kind of like an hour glassed valve guide.

Once the motor is out I will really measure it. The IN lifter measures .9032 All of the wheels spin like new. Will know more tomorrow.