ThumperMX113

What's the correct torque spec for the crank shaft pully bolt? I've got an instruction manual that says 37 ft lbs but that seems awfully low considering how tight the factory bolt was in there.

TacoBill

Torque in the write-up

How to: Install Steeda Underdrive Pulley

Doc Holiday

FIY:

I spoke with a tech at Steeda the other day while re-installing my UDP's, and he said that during the last step (turning the crank bolt an additional 90 degrees) you should set the torque wrench to 120 lb/ft and turn the bolt until the wrench "breaks" (clicks for the mechanically challenged, lol).

Ford specifies 115 lb/ft for the stock pulley. Steeda's old instructions said 37, then 90 degrees for the final torque, but apparently they're doing it different now, since the 90 degree method doesn't insure a specific torque and can vary quite a bit depending on who is measuring the 90 degrees, and also on the amount of stretch from bolt to bolt.

ThumperMX113

Thanks for that.. I guess I'll have to go re tighten it.