fasttimes1

iTrader: (29)

I just pulled this cam out of my car because Im going with a different setup. I noticed some rough spots on two of the lobes. I dont really know what causes this (bad lifter?), or if the cam is usable anymore. I had intentions of selling it, but dont want to screw anyone.

Pics:

Randy WS6

iTrader: (69)

The cam is definitely wiped out, It looks like the roller on the lifter locked up and was dragging on the lobe

Michael V

If you have a magnetic drain plug, you should have picked up increased debris with this damage. Its important to monitor this debris.

Mike V

PREDATOR-Z

Either that or tha cam wasn't hardened enough, but yeah, that cam is toast. Now you have to pull the heads, time to change the lifters.

davered00ss

iTrader: (4)

Comp has issues with their cams a year or two back doing something similar.

Could be a number of different things. I would change the liters.

fasttimes1

iTrader: (29)

Im replacing the lifters either way, but I found very minor abnormal wear marks on only 1 lifter, and the rollers on all of them seem fine (may not be fine at engine rpm though). Heads are removed already, they are at the shop being cleaned and inspected. New lifters were in the plans already, custom grind cam will probably be ordered this week.

Thanks for the replies.

vettenuts

iTrader: (4)

Likely causes:

1. Insufficient valve spring seat force and stiffness to keep up with cam
2. Pushrod flex

Less likely but could also be:

3. Improper heat treatment of cam
4. Improper heat treatment of lifter roller
5. Inadequate lifter roller material properties (less expensive steel)

If only two lobes, check the valve springs. Also, lifters likely need replacement as well.

Full-Force

iTrader: (11)

That wouldn't happen to be a Futral cam would it? Seems like a year or two ago alot of them were doing that. Cam Motion was the supplier.

fasttimes1

iTrader: (29)

Full-Force: Its not a futral cam.

vettenuts: Im running GTP Stage 2 heads which come with springs that should be able to support the lift on this cam. Along with that I have comp chrome moly push rods, but have stock lifters. Most of my valvetrain is being replaced either way: cam, springs, pushrods, lifters, & timing chain. Thanks.

vettenuts

iTrader: (4)

I would also consider stiffer pushrods, 5/16" pushrods are pretty flexible with the springs/cam lobes typically run in an LS1.

69LT1Bird

iTrader: (1)

Perhaps the lifter rotated due to a worn lifter holder, and ran sideways on the cam briefly.

ThirdGenLS1

iTrader: (11)

yea i would replace the lifters, cam, and run either a 11/32 or 3/8 inch pushrod

fasttimes1

iTrader: (29)

Definitely going with a stiffer pushrod. Never thought about the lifter holders, Ill take a look at them.

vettenuts

iTrader: (4)

Check for one stamped "10" on the bottom, some of those have been documented as having a slight angle to the lifter and under higher spring forces wearing the roller off of the lifter.

02 BLK WS6

iTrader: (11)

That cam will make a good paperweight.

fasttimes1

iTrader: (29)

Those paperweights add up after several years...lol!

mvvette97

iTrader: (18)

what kind of cam is that?

fasttimes1

iTrader: (29)

Its a Comp Cam.

mvvette97

iTrader: (18)

I thought I was safe buying a comp but after this I may not be after all.

fasttimes1

iTrader: (29)

Dont think its a cam issue though, just havent inspected deep enough to find the cause yet.