It turns the balance shaft. The balance shaft helps reduce vibration in the motor. It is usually driven by a belt that is connected from the balance shaft to the crank shaft and a tention adjusting wheel used to apply tension to the belt. Hope this helps, Dirk.

Yes it does have a balance shaft also known as a silent shaft.

That is called a balance shaft.

There is a chain driven balance shaft on the 4.0 L SOHC engine for the 4X4 Ford Explorers / Rangers

this requires a drive shaft company that can cut and weld it and balance it after.