stangtrader

iTrader: (2)

So today was driving my car home from work and got on it a bit. At 4500 rpm in second I had a bad valvetrain noise so I imeadiatly shut the car off then coasted to a spot to pull over. Got the car home and pulled my valve covers found a broken intake valve spring broken. Everything was put together correctly and I even was running stock pushrods and yes I know.
So my question is this would they warrenty the springs since I only got them a week ago and have less than 150 miles on them? Springs were made 12/02/2010. I'm super pissed and a valve spring is the least of my worries since I have a bent valve but wtf

PREDATOR-Z

When you say "Everything was put together correctly and I even was running stock pushrods and yes I know."
Did you measure install height?
Did you cycle heat them?
Is you car cammed?

stangtrader

iTrader: (2)

Pushrod length was correct and yes I heat cycled the motor.car is cammed.running a trickflow 238/242 @.595".
Was told by the manufacture the springs would be fine.

disc0monkey

iTrader: (10)

just go with a good dual spring.

stangtrader

iTrader: (2)

Just talked to Sdparts about warranty they said there is one and pac is pretty good about that. So gonna call them monday

PREDATOR-Z

It seems that you did not set the height on them. This could contribute to a failure. See springs are good to say .600 lifts but the trick is "at 1.x installed height". Failure to install at proper height will change the spring lift capability.

disc0monkey

iTrader: (10)

idk with a .595 lift they would have to be way off to break them that quick.

stangtrader

iTrader: (2)

Preditor-zz I fully understand what you are saying and don't dissagre but with coil bind @ 1.140 it would have to be off an extreme amount.
Honistly I did not check it granted its a over sight. But if ones off they all would be and if thiss was the isssue it most likely of happened sooner. I'm not trying to dispute it. Hopefully they will take care of me and warranty the ssprings

stangtrader

iTrader: (2)

One question what dual valve spring kit you guys recommend? Would the damper spring keep the valve from hitting the piston if one broke again?
Thanks joe

Darkman

iTrader: (2)

Pac 1221.

stangtrader

iTrader: (2)

Thanks ill check them out. Was looking at a lunati gold kit for for $209

disc0monkey

iTrader: (10)

patriot golds

stangtrader

iTrader: (2)

Well its come down to patriot gold's or lunati golds.leaning more towards lunati.looked at the pac 1221 but they were a lot more and don't know if I wanna give them more of my money

BaddBird

iTrader: (6)

I fail to see how this is PACs fault? If you didn't verify the correct installed height then your valvetrain was not setup correctly.

stangtrader

iTrader: (2)

I understand when springs are installed the height needs to be measured.here's the thing factory valve springs have a install height of 1.8" my spring seats have no shims under them.if any thingss the springs probly would a Tad loose.the spring is broken cause it is defective not due to checking in stall height.if it was a coil bind issue I would have to be off by double my lift to create coil bind, if this was the issue it would have happined far sooner probly while heat cycling the springs. Not after 130 miles of driving

stangtrader

iTrader: (2)

Dis regard the spring would have to travel twice the distance part I should have said .060 farther

disc0monkey

iTrader: (10)

factory install height i think is 1.78

stangtrader

iTrader: (2)

Well I found some thing that may have caused the problem. Ill post some pics in a few

stangtrader

iTrader: (2)

Here's what I believe to have caused the broken spring.
the lock must have popped out and put a lot more preload on the
spring.



Here's how the piston came out
looks like it will be fine to use but no more nitrous.
grooves look to be .015 deep at most. Need to grab my mic
from work


And here's the bent valve


And lastly I have a cracked valve guide.you guys think it would be cheaper to replace
or just get a new head? Its onlyy got 8k original miles

Darkman

iTrader: (2)

If it is only the guide that is cracked it is replaceable.