jvoodoo, loosen the 19mm bolt on the belt tensioner a turn before loosening the adjustment rod. The pointer will move as you loosen the tensioner. If you already attempted to loosen the tensioner without first loosening the 19mm bolt chances are you destroyed the belt tensioner and need to replace it. In fact, if it's old you may need to replace it anyway. As mentioned use an allen wrench or a piece of wire (with a 90 degree bend) to secure the fan clutch when loosening the fan bolts.

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Fred Hoelzle