The tensioning pulley supplied differs visually from the pulley fitted in the vehicle.
ContiTech supplies two different versions of the tensioning pulley, with and without pin KM-6333. The two designs differ in their fitting, but they can both be used without reserve.
The version without a pin has to be tightened clockwise initially using a 6mm hex key after mounting on the engine (20Nm + 120°) to enable the belt to be fitted. Once the hex key is removed, the tension is automatically set.
In the version with a prefitted pin, the pin is only withdrawn once the belt has been fitted. Here, too, the tension is then automatically set.