Quote:
Originally Posted by Bill Douglas
Yep, the idea of the gap is so the valve really does close. So better more gap than less gap if there is going to be a degree of error.
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It's +/- .002" because anything from .002" to .006" is just fine. The idea being that if you use a .004" feeler gauge and adjust the lash so it just slides in the gap between the rocker foot and valve stem, you are good to go!