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Every "shade tree" mechanic learns how to do the job better and better than the book each time doing the task and chalks problems up to experience and doing it faster so please do not give up on the club. The timing belt replacement part I dispise is removing the other belts--the rest is easy and quick with practice.
My personal candidate for clarification is the mark for the crankshaft sprocket requires wrapping the belt out of its path, that is why it is done first. If the tension in the belt is not kept on the opposite side from the tensioner, the belt can be off by the slack, especially if it "slips" on the crankshaft sprocket. Looking at the belt sprockets, the cranshaft's sprocket is exactly one half the diameter of the other two sprocket's diameter meaning it should turn exactly twice for every revolution of the other two sprockets and also meaning that the timing mark shows on the crank sprocket once when the others align and once when they do not which is half the time. So the timing is ok, even if it only lines up once every two turns. The BB FAQ instructions say two turns for this reason.
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