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BEWARE: Broke my leaf spring today!!!!!

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Old Aug 2, 2009 | 08:21 PM
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Default BEWARE: Broke my leaf spring today!!!!!

What's up guys,

Well just like the title says, I broke my freaken leaf spring today.

I went up to the mountains to go carve some corners with the new wider wheels and tires. My car is equiped with the Z51 package btw. I was driving for about 10mins pretty hard when I noticed my car started bouncing a little to much in the rear and I know it wasn't the road. So I pull over and my car was literally slammed from the rear. The rear 345 tires were in the wheel wells. Check out this pic.
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Well at first I thought my rear shocks had gotten so hot that they had completely failed under stress. Unable to get any kind of service in the mountains I turned back around and started heading back being very careful with imperfections in the road. I drove the car back to my house (about 30miles away) and jacked it up. This is what I was presented with...


That's right...that is my rear leaf spring broken right down the middle. I was stunned when I saw that.

Has anything like that ever happened to any of you?
BTW if anyone knows someone with a set of ZO6 leaf springs or any other kind of rear leaf springs (for mean while) please refer them to me. This is my daily driver.

Thanks for looking guys
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Old Aug 2, 2009 | 08:37 PM
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Oh btw, I'm pretty sure that ZO6 springs will drop right in but I want to be 100% sure. Are ZO6 springs direct replacements for Z51 springs?

Thanks
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Old Aug 2, 2009 | 08:38 PM
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hmm, wonder if heat from the cut outs had anything to do with it?
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Old Aug 2, 2009 | 08:40 PM
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Originally Posted by KarlK
hmm, wonder if heat from the cut outs had anything to do with it?
Intresting theory.

I dont think Ive heard of any other failures like that.
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Old Aug 2, 2009 | 08:42 PM
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Man, that's crazy. I'll have to say that is the first time I have heard of a leaf spring breaking. Was the car ever in an accident?


Originally Posted by Sparo2
Oh btw, I'm pretty sure that ZO6 springs will drop right in but I want to be 100% sure. Are ZO6 springs direct replacements for Z51 springs?

Thanks
Yep
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Old Aug 2, 2009 | 08:42 PM
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Interesting, I've never even heard of anyone breaking their leaf spring before.
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Old Aug 2, 2009 | 08:43 PM
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Just a heads-up, the base rear springs are stiffer than the Z51 springs(base is 657, Z51 is 645, Z06 is 782). Do me a favor and look at the leaf spring stamped numbers. Just because you have a certain model doesn't mean you have the spring you think. When they run out of parts on the assembly line you never know what you'll get.

San
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Old Aug 2, 2009 | 08:45 PM
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Originally Posted by KarlK
hmm, wonder if heat from the cut outs had anything to do with it?
Definately could be a factor.

San
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Old Aug 2, 2009 | 08:46 PM
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Yes, the Z06 springs are a direct fit for Base or Z51. Good luck!
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Old Aug 2, 2009 | 08:50 PM
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I don't think the heat from the cutouts were the cause. I had cutouts on my car for a year now with no problem. The only difference is that now i have headers and hi-flow cats. I still don't think it was the cause but i could very well be wrong...but that is an ineteresting theory.

The car has never been in an accident and I spend a lot of time under the car and never seen a crack on the spring or anything that would lead me to believe the spring was going to fail.

Where on the spring would the number be stamped at? I can check it right now.
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Old Aug 2, 2009 | 08:52 PM
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Time for some Pfadt Coilovers I would say
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Old Aug 2, 2009 | 08:56 PM
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Originally Posted by CamaroCane
Time for some Pfadt Coilovers I would say
You took the words right outta my mouth. I just wished they financed.
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Old Aug 2, 2009 | 08:57 PM
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Originally Posted by Sparo2
I don't think the heat from the cutouts were the cause. I had cutouts on my car for a year now with no problem. The only difference is that now i have headers and hi-flow cats. I still don't think it was the cause but i could very well be wrong...but that is an ineteresting theory.

The car has never been in an accident and I spend a lot of time under the car and never seen a crack on the spring or anything that would lead me to believe the spring was going to fail.

Where on the spring would the number be stamped at? I can check it right now.
I'm not sure where the numbers are stamped. Depending on your hurry, I might be able to help you out with a rear spring. I won't need it and I'd let you have it. I like to help out when I can.

San
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Old Aug 2, 2009 | 09:09 PM
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It's the cutouts. This is not the first time I've heard of this, although I cannot send you a link to other stories, I've read several when researching my cutouts on my C5. If you'd care to search on the C5 tech forum you will find them. The very hot exhaust over time delaminates the fiberglass spring.

You need turndowns like I have or I'm afraid it will happen again to you. I've had my cutouts for 2.5 years now with no problem.

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Old Aug 2, 2009 | 09:15 PM
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Originally Posted by Joe_G
It's the cutouts. This is not the first time I've heard of this, although I cannot send you a link to other stories, I've read several when researching my cutouts on my C5. If you'd care to search on the C5 tech forum you will find them. The very hot exhaust over time delaminates the fiberglass spring.

You need turndowns like I have or I'm afraid it will happen again to you. I've had my cutouts for 2.5 years now with no problem.
I agree, in the pics of the OP the cutout appears aimed at the leafs
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Old Aug 2, 2009 | 09:17 PM
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At the cost of confirming my ignorance, what are the cut outs for? Is that the NPP dual control exhaust thing I've been reading about?
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Old Aug 2, 2009 | 09:24 PM
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Originally Posted by oldmansan
I'm not sure where the numbers are stamped. Depending on your hurry, I might be able to help you out with a rear spring. I won't need it and I'd let you have it. I like to help out when I can.

San
Thanks San. I really would appreciate that. How much do you want for it? This is my daily driver so I'm willing to go down and pick it up.

Let me know
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Old Aug 2, 2009 | 09:25 PM
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Is it me or are those cutouts open ALL of the time? I don't see any valve upstream.
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Old Aug 2, 2009 | 09:29 PM
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Originally Posted by Spying Beast
At the cost of confirming my ignorance, what are the cut outs for? Is that the NPP dual control exhaust thing I've been reading about?
I got mine before the NPP came out (and if you have a trailer hitch for track tires like I do you can't use NPP). Cutouts are a great option for quiet most of the time or arrest me loud when you want it.

If you don't need a trailer hitch, and get a deal on NPP's, they are about the same in function. Cutouts can be cheaper if you can get a deal on the install. They add about 6 rwhp if you'e got a cam, not much on a stock engine.

Here's my thread on cutouts:

http://forums.corvetteforum.com/c6-t...-on-my-c6.html

And here's why I got them.

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Old Aug 2, 2009 | 09:29 PM
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Originally Posted by KarlK
hmm, wonder if heat from the cut outs had anything to do with it?
That's one possibility (though not likely) of course.
There appears to be some sort of fluid on part of the spring, but that's another unlikely scenario.
Wider/heavier wheels and tires a possible contributor?
Is the car lowered on the stock bolts?
All of the above?
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