ConnorDz28

OVee the weekend I snapped a valve spring on deceleration at 2k RPM. Only 4K miles on the springs and the entire engine itself. Any causes that could have snapped it other then part failure? Seems rather odd...

JoeNova

Are they Comp springs?
The 918s used to have a history of breaking randomly.

KCS

iTrader: (20)

Those don't look like any of the commonly used LS specific springs, they don't even look like a dual spring as I can't see an inner spring.

Darth_V8r

iTrader: (4)

Maybe it's a trick of the camera angle, but I don't think they look like a matched set. I think I'm seeing at least two - possibly three -- different springs.

My first thought was comp 918 on reading the title, but those don't look like comp 918 at all

Jontall

I'd buy a brand new set of springs from Tooley.

farmington

iTrader: (14)

A lot of springs break when pushed hard before the engine gets up to temperature.

slogo

The 918's I have seen are Beehives.

KCS

iTrader: (20)

Very true. That and either installation error or shipping/handling damage seem to be most common.

cam

iTrader: (9)

Dont mess around with iffy springs. Iffy you dont know? Change em all. Most serious guys change em every year anyways. Cant go wrong with fresh valve springs. I have no clue what those are either. I too think they look mismatched and a couple look like PG with the inner removed. Call PAC, give them your cam spec, get a new set. Verify preload and order pushrods if need be. 0.050" is a nice safe pre load if your gonna beat on it. My first LS1 still tickin with that pre load and it gets run to hell