First off I'm not a motor head, but I'm learning so please bare with my future newbie questions like this one. I just bought a new blower motor for my 71 riviera, and it came in two pieces, 1 piece the motor, the second piece was the blades. So I put the blades on the motor's shaft and tightened it down with the nut. My question is, are there any torque spec's on the nut? If i hand tighten it as hard as i can, it starts to spin the shaft of the motor (which is normal) But Should i grab the shaft with pliers and tighten the nut even more? I just don't want to mess up and over/under tighten it. thanks in advance for the help Shawn