Quote:
Originally Posted by freebeard
I don't know if you can extrapolate from aircooled tech, but VWs (solid lifters) work best with .004" cold, but for the American market they recommended .004" intake and .006" exhaust, and then eventually .006" all around. Because Americans couldn't be trusted to check their valves every 1500 miles. It was a small performance hit.
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Interesting. Spec on this 1998 Civic DX is 0.007-0.009" on the intake and 0.009-0.011 on the exhaust. I figure that setting to 0.007 intake and 0.009 exhaust is a modest "mod". I don't think I need to fear too much change and wear all that quickly. For the first 200,000 miles the valves went unchecked and they were almost all (except #1 cylinder) in spec still. And #1 was only slightly tight (at 0.006 on one intake lifter, for example). Tightening should help emissions, too. I go in for smog testing later this summer.