ls9 valve spring. or was.

roughly 15k miles. max of 6700 rpms.

 

yep could have turned out really bad

 

And you heard a noise I take it ?

Glad it didn't bite ya

 

Glad it didn't end up worse!

 

How did you notice it? How much lift are you running?

 

Also interested in the lift..?

 

Damn,that sucks!!
Not cool to see

 

when i would cold start the truck it would tick it's *** off. i just took it as the usual ls engine lifter/piston slap stuff below 40 degree's. pull the valve covers off and did a push rod length check to see if the pushrods were a bit short, or something else was wrong. push rods came up fine in length. so, now i have a set of .025 over rods for no reason.

got to looking at the springs and noticed one was not right, or not sitting like the others. noticing inconsistent air flow numbers on back to back pulls. little things here and there that didn't seem right.

noise, visual, and data log info.
the cam in the truck right now is .500 lift. the ls9 cam i had in it was .562"/.558. the springs are the part number supplied by gm for the ls9 springs.