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On 17 Aug 2006 at 20:33, russw wrote: > The original diaphram had what is called in the trade, "blousing". > Ridges molded into the material to allow for movement with the outside > trapped between the housings. Good term. I can't tell whether the blousing was molded in or was caused by being tightened in the extreme position. At this point, many years later, the end result probably looks the same. > > So here's my question: Is this the same for the later engines? > > > > Russ, did you use the same setting jig (VW 328d) for the 40 hp and 53 > > hp engines? > > There were only 2 different gages that I know of. One for 36hp and one > for 40hp/53hp. Okay, then that's our answer. The stroke is 8 mm to 13 mm and the diaphram is to be tightened with the lever lifted just past the 13 mm extreme, to 14 mm. That would create the blousing that is important here. thanks, -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~