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welp, I had my truck out this weekend and I figured I'd hold a bill there and see what happens. Long story short, I ended up with half a dollar in my hand, the other half got ripped right off so I...

ohhhhhh,
ok. I misunderstood the test. I think I'm ok in that case.
I'll try it again with a $20 just to make sure.

I tried the towel across the exhaust method you mentioned before (I couldn't find that thread again), I'm not sure if I have burnt valves or not. I don't really have anything to compare the towel...

When a valve is burnt what actually happens to it that screws it up?
Does it get warped or something? Or does some of it actually erode away?