How much effort (relatively) should it take to move the serpentine belt tensioner to remove the belt? Am I correct in assuming that a ratchet on the tensioner pulley nut clockwise should rotate the tensioner to release tension? I am afraid that my tensioner is frozen or else I'm not using enough effort. If frozen, how is the tensioner removed for replacement, i.e., how is the tensioner attached to the block, I don't see a bolt.