I forgot to mention, the fan itself is a little wobbly when the engine is off. It seems to move a fraction of an inch when jiggled. I tried to stop the fan when the engine was cold, with a rolled up magazine with no significant effect except a torn up magazine and little pieces of papper all over the tip of the engine. I thought it was snowing in Texas in August. Anaway, it is obvious the fan IS being engaged.

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