chevytruckguy

I put the comp cams 212/218 .522/.529 lift cam in my 06 RCSB with a 4.8. Noticed the stock cam had a weird wear pattern on the fourth lobe from the front of the motor. Here are some pics. Does anybody have an idea as to what might have caused this? It had 58k miles when pulled.

blazinblue

iTrader: (15)

I put a cam looking like that on my bro's Camaro, ended up destroying the lifters

dirt track racer 81

iTrader: (45)

if you already put the new cam in, pull it out. you will ruin it. you need to replace the lifter

KevinF56

iTrader: (9)

he already did put the new cam in. he posted this on GMFS almost a week ago.

chevytruckguy

Looks like I'm pulling the lifters then. Do the heads have to come off to get the lifter out?

redsilverado05

In that case I'd pull it out again, pull the heads and replace all the lifters, and seriously consider replacing the cam because if that lifter is chewed up then the new cam is damaged there as well. That sucks by the way.

dirt track racer 81

iTrader: (45)

hell i didnt know.
yep the heads have to come off, pull the cam and change it and might as well get the ls7 lifters while there

chevytruckguy

Will I need new pushrods for the ls7 lifters? Im guessing I should have posted here too. My bad.

NateZQ8

iTrader: (3)

yep bad lifter.........nice little groove in there.......did you hear any noises coming from the engine?

chevytruckguy

Nothing but a light tick, on the drivers side.