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427 broken valve spring 427 broken valve spring
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Old 03-10-2019, 08:07 PM
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Join Date: Jun 2018
Location: Seattle, WA
Cobra Make, Engine: ERA 427sc
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Default 427 broken valve spring
So I found this today, after ruling out spark and fuel on a dead cylinder.



What might cause such a catastrophic failure like this, so I can avoid it going forward?

It's been getting below freezing at night here, though I always let the car idle for 5-8 minutes until the water temp gauge starts moving, and never drive it hard until the oil temp is fully up.

I did have it in the shop over the Summer for some work which involved taking the valve train apart. Possibly damaged then or mis-installed? Seems like that would have happened much sooner if that were the case.

Hopefully, the valve is not bent.. or worse!
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