canman47 Posted September 6, 2014 Share Posted September 6, 2014 Wear would make the valve clearance looser. In 40 years of wrenching on engines I've almost never seen one tight more than a thousandth. That typewriter sound you hear from old Toyotas is loose valves. How could they get tighter unless somebody adjusted them wrong? Quote Link to comment Share on other sites More sharing options...
Donnie Posted September 6, 2014 Share Posted September 6, 2014 Wear on the contacting parts , the cam, cam follower, rocker arm, valve stem etc., whatever parts are involved in the engine that you are working on will create a valve tap, or a wider connection as you mentioned....BUT, valve seat recession, or the valve pounding its way into the head will create a tight valve.......more noticeable since lead has left the scene.......one way that you will see tight valves...I always set mine cold & allow for the hot/cold spec. HTH, .................donnie Quote Link to comment Share on other sites More sharing options...
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