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Well, it will pop out the carb, or exhaust, witchever valve is bent. Pull the valve covers off, and turn the motor over slowly, by hand. Make sure all of the valves are closing, or, the stem height is all the same at one point, on every valve. And remember, a burned valve, will act the same as a bent, or stuck valve. A cylinder leakdown test is the proper way to diagnose this, however, that requires a few specialized tools, which most people do not have in their garage.

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Q: How do you know you have a bent valve in a big block Chevy?
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