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> The story I heard regarding this issue is that overheating and burning valves had always been the biggest reliability problems in early volkswagens. In the 60's VW decided to try and resolve these problems. The first solution was .006" valve clearance spec for all engines.(previosly 004" in many models) Since cylinder #3 had a tendency to run hotter, preignite more and burn more valves the timing for that cylinder was retarded. A special rocker arm stud kit was released to allow retrofit of early heads to accomidate the .006" valve adjustment spec. My understanding is that these changes did help make the VW engine more reliable and longer lasting. > My understanding was that because Americans were too lazy to stay on top of their valve adjustments and thus burned up tons of engines, VWoA recommended an increase to .006" across the board on engines that should have been .004". I've used .004" on lots of VWs (sometimes .006" on the #3 exhaust) without trouble. Except my '63 Squareback, which is .008" and .012" on the all-original engine, at least according to the owner's manual. - Everett ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~