Valve adjustment. I've never done it on this particular car and there was one valve that was notably louder than the others (turned out to be the intake on cylinder #1), so I figured I'd adjust them properly. The manual has good details, with the goal being .015" lash at operating temperature. Since it was 30 degrees outside today, I wasn't able to run it up to temperature on the road, so I left it idling for about 20 minutes at high idle and blocked off a portion of the radiator to get it reall
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