When I took my America in for its check at 20 K, it was mostly the same thing. I think a couple of valves were off just a little more than you're reporting. The mechanic said that he would even worry about checking them again for another 20, even though it calls for every 10, I believe. When I sold it last year with 50 K on the clock, I told the new owner that he should have the valves checked, just as a matter of course. But there was No noise.
