USMC5811

iTrader: (2)

How often do valves break....I had one break in my cam only '99 SS. And what on earth causes this to happen?

ULTIMATEORANGESS

iTrader: (4)

im ASSuming valvetrain upgrades were installed with your cam so did you over rev it?

BLK95-Z

iTrader: (2)

Were you racing it? Were did it break?

USMC5811

iTrader: (2)

Upgraded pushrods and springs. and i wasnt racing or over revving it. i was cruising at about 15mph in traffic on my way home.

it broke about an inch down from the top of the valve stem

USMC5811

iTrader: (2)

anything?

TyCZ28

Ive heard of dropping a valve, and bending a valve.. i have NEVER heard of one breaking off. got any pics of this? im kinda interested in what it looked like when you pulled it apart

ANGRY BIRD

iTrader: (2)

you don't have to adjust preload on LSX's, right? I would say maybe the lash was incorrect and the valve was tapping the seat, but that shouldn't be an issue.

USMC5811

iTrader: (2)

anybody else have any ideas?

redtan

iTrader: (5)

Have you taken the heads off to see if there was any piston to valve contact?

Maybe the springs lost enough pressure for the valve to drop enough and make contact with the piston. The fact that it broke while taking it easy could mean that the contact was not severe to shatter anything, but enough to maybe weaken the valve eventually leading to a break even when not actively making contact.

Kooljames20

iTrader: (9)

i had a intake valve break one my ls3 heads on a lq4 it ruined my head and put a hole in the piston

DrewKeen

What type of valve were you running in it? The original ones?

USMC5811

iTrader: (2)

yea they were the stock heads w/ stock valves. I'll post pictures later, but there was piston damage from where the valve dropped and was being smacked around....