belt tensioner replacement

[Cloggy Saint]

I've read the wiki article on this but think maybe I've got the wrong end of the stick. Should I remove the spring and pin from it's housing before removing the tensioner pulley?

[Brianmoooore]

Spring and pin will fall off when you remove the tensioner. The spring pressure is the only thing keeping it in place.

[Andyboy]

Slacken the 13mm and the long stud, big screwdriver to push tensioner fully back to compress spring and retighten 13mm. I fit a new spring as well, buttons from BMW.

[Cloggy Saint]

Cheers guys, new tensioner/spring is waiting to go on.