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On 23 Aug 2005 at 22:46, Steven Ayres wrote: > => 143.5 mm +/- 5 mm. > > Shouldn't that be +/- .5mm? I agree that 5mm seems like a lot, but that's what it said. Keep in mind that this is NOT a number that you are supposed to set your pushrod to. It is the range that factory-set pushrods fall into. The range is due to tolerance buildup in the pan, body and the mounting of the 2 together. Consider mounting the pan to the body. There are a bunch of bolts and a bunch of holes. The holes are oversize, just to make sure that you can get all the bolts in, so there is bound to be some slop there. It's easy to get 5mm of variation between random assemblies of stamped and welded sheet metal. Of course, if Everett and Dave are right, maybe the simplex MC cars where just set to 143.5 mm since it really didn't matter that much. OTOH, Dave's scan of the setting gauge doesn't mention a different gauge for early type 3s, even though it does for type 1s. Granted, the early type 1 gauge is still within the tandem MC era. Does ANYONE have any mention of this setting gauge from a time before the tandem MC era? -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~