 Sounds like nothing's leaking. We just had a couple lately with these V8 Chevys that are having some bent valve issues. They're kind of folding over like an umbrella in the rain, and they're leaking, but not always. If we put air pressure in the cylinder, they seal up. We're like, okay, I don't hear anything. And then we crank it over, and the compression's gone. It won't run. Then we put air in there again, and they seal up, and then nothing. And the carbon...