Yes, if you stick a dowel or cotter pin in there it will lock it into place. Then you just release it after you have your belt back on and then it will re-tension.I got it.
- The 16mm molded nut is to loosen spring tension momentarily (by leverage)
- The T50 torx bolt is just to hold on the axle of the pulley
Good thing because I can't get a socket onto the T50 Torx but I have no problem getting a box wrench around the lower tensioner 16mm molded nut.
The alternator belt is now off! Now on to the serpentine belt!
Also, to answer your question in one of your posts about a reference the Bentley makes. In the picture below you will see the ICV behind the DISA valve. On the left side you will see the electrical connector and on the right side the pipe that leads into the intake elbow is the other reference.