01-07-2017, 03:07 PM
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CC Member
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Join Date: Feb 2012
Location: Keller,
TX
Cobra Make, Engine: Lonestar Classics LS427. Self-built 408W, AFR 195 heads, Performer RPM Intake, Quick Fuel 750, 407rwhp, 479rwtq
Posts: 549
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Not Ranked
Maybe. But I can't imagine all the springs were from the same batch. Maybe just the two that broke. I would imagine that they make the springs by the hundreds, if not thousands. One intake and one exhaust spring broke. The rest didn't. ALL 16 guides are worn. Seven out of eight (88%) if the intake valves have damage. None of the exhaust valves are damaged. One of the damaged springs was intake, one exhaust.
Maybe all the springs were over heat treated and made them brittle. Maybe that caused valvetrain problems that ruined all the guides. Why did it only damage intake valves? I don't know - I'm at a loss as to why or how.
Thanks for the input tho.
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