PRC 660 springs
#1
Staging Lane
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Join Date: May 2007
Location: St. Clair Shores MI
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Well I think my springs let loose because I have some noise on the pass side valve cover and those springs are like brand new not even a 1000 miles on them. Has this ever happen to anyone with these springs? I bought them from texas speed. I'm going to pull the valve covers off wed or thurs and see for sure. I am getting miss fire readings and it say its #3 and #6. let me know what you think. thanks
#4
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Pull a cover and check it out. That's a big jump to a conclusion without anything but a sound to base it off of...could be a rocker arm that spilled its beans, broken valve, dead lifter, etc.
Let us know if it's a spring and of course we'll do everything in our power to take care of you though!
Let us know if it's a spring and of course we'll do everything in our power to take care of you though!
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#5
#6
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Please explain why because most of us on this board practice this. In fact I have been practicing this for 25+ years with my Gen 1 stuff. Please provide RESEARCH & DOCUMENTATION with your reply. I have just been doin what I was taught![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
It does make sense in a way as engine temps are much lower than temps required to temper steel
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It does make sense in a way as engine temps are much lower than temps required to temper steel
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#8
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Shoot me your name and we'll get you taken care of!
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
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#9
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I can not provide documentation/test results as it is proprietary to the manufacture. Only my experience from running the dynamics/durability lab at a major spring manufacture.
The more temperature they see generally the more load loss will occur, but heat cycling them isn't going to increase the life of a typical aftermarket spring. Keeping them cooler will though (oil sprayers/flooding the valve covers).
There is no "break in" procedure for a valve spring. 99% of failures are from:
-Over stressed Design or improper material/processing used.
-Bad dynamics causing a over stressed condition (wrong spring used).
-Manufacturing Defect.
-Handling Damage.
That's pretty much it. Heat cycling/"breaking in" the springs will do nothing to help with these failure modes, but it won't hurt it either I guess.
#10
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You pretty much answered your own question.
I can not provide documentation/test results as it is proprietary to the manufacture. Only my experience from running the dynamics/durability lab at a major spring manufacture.
The more temperature they see generally the more load loss will occur, but heat cycling them isn't going to increase the life of a typical aftermarket spring. Keeping them cooler will though (oil sprayers/flooding the valve covers).
There is no "break in" procedure for a valve spring. 99% of failures are from:
-Over stressed Design or improper material/processing used.
-Bad dynamics causing a over stressed condition (wrong spring used).
-Manufacturing Defect.
-Handling Damage.
That's pretty much it. Heat cycling/"breaking in" the springs will do nothing to help with these failure modes, but it won't hurt it either I guess.
I can not provide documentation/test results as it is proprietary to the manufacture. Only my experience from running the dynamics/durability lab at a major spring manufacture.
The more temperature they see generally the more load loss will occur, but heat cycling them isn't going to increase the life of a typical aftermarket spring. Keeping them cooler will though (oil sprayers/flooding the valve covers).
There is no "break in" procedure for a valve spring. 99% of failures are from:
-Over stressed Design or improper material/processing used.
-Bad dynamics causing a over stressed condition (wrong spring used).
-Manufacturing Defect.
-Handling Damage.
That's pretty much it. Heat cycling/"breaking in" the springs will do nothing to help with these failure modes, but it won't hurt it either I guess.
#11