Tighten tensioning roller -2- with a torque wrench to a tightening torque of 7 Nm.
Tighten bolt nut -3-.
In workshops, the exact check and adjustment of the V-belt tension is carried out using a special machine.
The tensioning hook -2- of the tool must be placed in the middle of the tines. In this case, the pointer arrow should be in the green or yellow sector of the scale for the corresponding engine. In addition, the set value on the scale is different for a new and a used belt. If the pointer is not in the specified sector of the scale, adjust the tension of the V-belt.
If such a device is not available, the belt should be tensioned so that it bends when pressed with a finger in the middle between the pulleys by 5 mm. The V-belt tension must then be adjusted as soon as possible using the BMW tool.
Tighten bolt -1- and nut -2-.
Fit and tension the V-belt of the power steering pump.
Install fan.