![]() The entire flywheel/crank assembly was clamped by a central large "bolt" (m 28×1.5 ?) torqued to 350 lb-ft or more.Ī Porsche 912 engine is rated around 120 lb-ft of torque. The dowels were an interference fit in the crank, and essentially line-to-line in the flywheel. On Porsche 912 it is about 1.5 inch/38 mm "bolt circle". I think the diameter the the dowels were installed on varied. VW used 4 hardened 8 mm dowels in the joint between the (much better then mild steel) flywheel and crankshaft. ![]() I know standard calculations proceed along those lines, but the most ideal doweled joint I can think of existed in aircooled VW and Porsche 4 cylinder engines from yesteryear, and it is far from immune to hole elongation when asked to endure unintended dynamic loads. ![]() "If the pin is very loose in the hole, then elongation would take place." ![]()
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