LS1Formulation

iTrader: (13)

Yeah, for sure. I just ordered a set of Patriot gold springs for it, so I won't need to worry about spring problems again.

dyls1

iTrader: (11)

glad to hear it wasn't as bad as you thought

tnmotown

iTrader: (107)

if the valve springs broke, couldnt there be a chance that the pistons could of been slapping the valves? just wondering.....

chrs1313

iTrader: (24)

the way to check if it is the verter is to leave it in park and see if it make the noise...then throw it in gear and with the load on the trans and verter the noise will most likely go away...mine did that and i though it was the rod too sounded horrible...

mine was the damn powder coating on the tci flex plate all 5 bolts were hand loose...

twitchtwice

iTrader: (12)

someone said about 8 times that he's an m6

johnLs1camaro

iTrader: (28)

what valvesprings did you have on it, stock ones???

Gregorya24

iTrader: (13)

dont feel bad buddy, i threw a rod today in my car and just bought it back in feb! time for a texas speed engine!

LS1Formulation

iTrader: (13)

The valve spring broke, but it's still holding the valve shut 100%. I never revved the engine up much above idle. I really doubt the valve hit the piston.

razorclaw99

iTrader: (7)

Im pretty sure knock is the noise that comes when pistons hit the valves..Pretty sure the damage has already been done

01350ss

iTrader: (18)

Actually, when the valve spring breaks, if it is still retaining the stem and locks, the piston will not hit the valve. Once the tension on the spring is released, it will expand - bringing and keeping the valve closed. If the valve is closed, the piston has no chance of hitting the valve.
Chances are really good that no other damage was endured from the broken spring.

andrew69_04

iTrader: (148)

What springs were you running?

Mr. Brett

iTrader: (13)

Good news, man. What cam/springs were you running? And how fast do you spin it?

00_transam_vert

iTrader: (5)

Congrats man! Good to hear its gonna be a relativley easy fix!

Rapter34

iTrader: (4)

So the spring broke at idle? very lucky for you. D you have any idea why it broke?

razorclaw99

iTrader: (7)

I'm confused..Isnt the knock the noise that comes when the piston hits the valve?? I mean the way you described it, being loud and all..it didnt sound good..

krill

I think the noise he heard was the space between the rocker and valve stem - way to much lash after the spring broke and compressed some.

I know this because I broke one of my valvesprings without bending a valve, my first thought when this happened to me was also rod bearing.

LS1Formulation

iTrader: (13)

That's what it was, excessive lash, I think. I just did a compression test on that cylinder to be sure - 155 PSI. I'm positive that the piston didn't hit the valve.

Ryan L

What springs were you running and how old were they?

LS1Formulation

iTrader: (13)

No idea what springs they were... I bought the heads complete used.

1 QUIK LS1

iTrader: (4)

Just read this and glad to hear it was somthing simple to fix(well vs. a rod bearing).I'll take luck anyday lol.