When vavle springs break
03-27-2004, 06:07 PM
#2
You want to know what happens? I am building my 3rd motor because of me not changing my valvesprings in a timely manner. I was close to 6krpm and my valvespring broke. The timing must have been just right for the valve to drop into the cylinder and get in between the piston and the cylinder wall and crack the sleeve. Now do you feel lucky? Do you!! Do not take a chance on not using the proper valvetrain. Some get away with just a broken spring and others..... You get what I mean. Do it right the first time and your motor will last a long time. Downtime sucks.
03-27-2004, 06:09 PM
#3
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I had one break, it was a double spring, the outter spring broke. I didn't even know it was broken, check engine light was flashing, the car drove fine. Like vince said, it can be anywhere from just replacing the springs to replacing the entire engine.
-Sly
-Sly
03-27-2004, 06:12 PM
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My original reason for asking is I autocross, and am looking down the road for a cam package that can handle some high rpm abuse every weekend. Is there any reason to replace stock springs on a stock cam after 3 years of autocrossing?
03-27-2004, 07:22 PM
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Yes, even stock springs will get tired. Get a set of stock diamter duals, then if you want to swap cams later you can. I firmly believe that springs last longer the longer you break them in. Just me, but I havent had any problems with springs that have had several heat cycles and at least 500miles on them before revving or anything. Not always the case I know, but my experience.
My buddy, Drew778, broke a outer spring, thought the tune was going bad or something, had high oil pressure, and a slight "miss" if you will. Once I heard it, then drove it, I knew it was a spring right away. Lucky for him, it was a double, and all three outer pieces were in the pocket. After 3 yrs of AutoX I would swap for POM!
My buddy, Drew778, broke a outer spring, thought the tune was going bad or something, had high oil pressure, and a slight "miss" if you will. Once I heard it, then drove it, I knew it was a spring right away. Lucky for him, it was a double, and all three outer pieces were in the pocket. After 3 yrs of AutoX I would swap for POM!
