out of no where my engine has developed a decently loud ticking sound. never had any piston slap or oil consumption, so i removed the valve covers and noticed that on 3 of the rocker arms i can pull up on the front side (valve stem side) of the rocker arm about 1/4 inch, and can feel either the lifter moving or compressing. is this a sign of a bad lifter ?

 

hey yo when does you're ticking sound happen?

 

it was constant, never checked other rpm's cause i didnt want to keep it running

 

sounds like lifters to me

 

Slow or fast ticking at idle? Miles on the engine? Internal mods, besides the cam? Lift on it?

Ticking on driver's side??

Edit... I didn't read all the way.. Sounds like you have a collapsed lifter.. Get a set of LS7's. They're the LS1 replacement lifter now. Cheap too.

When you attempt to pull up on the tip of the rocker, it should be rock hard, w/ LITTLE play.

 

miles on engine probably around 35k, lift on cam is .568, 918 springs, rev limit is 6400


thanks guys !

 

check p-rods while there. I believe lifters should not be able to compress at all....