one thing I have noticed about the click type wrenches is that the first time they "break" or "click" after sitting a while it may be at a much higher torque than what you have it set for. It seems more pronounced the longer it sets and the lower settings within its range. This goes for good quality Snap On or lesser torque wrenches. I always start out by "clicking" them a couple of times at the minimum setting first and then adjust up to the required torque spec.
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