The nut gets tightened over time due to grime and dirt. Once you take the whole thing off you can separate the nut from the shaft. Once out, you'll find out the shaft has an hexagonal body, look at part #8 on the drawing. Once you separate #21 and #8 you will then re-install #8 at factory torque specs and assuming the threads where #21 go onto are in good shape, you should be able to use it without both parts spinning together. Part #8 has two functions, one end holds the timing belt tensioner backplate (part #7), the other end provides a fastening point for the center of the timing belt cover which is the one you were turning.
Fixkick, correct me if I'm wrong but if cosmic_splatter turned that loose and the whole #8 loosened up that means that his timing belt tensioner could have moved as well, right? since the spring can now pull on the tensioner?
Fixkick, correct me if I'm wrong but if cosmic_splatter turned that loose and the whole #8 loosened up that means that his timing belt tensioner could have moved as well, right? since the spring can now pull on the tensioner?
1996 Geo Tracker, CAMI, 16 valve, 5sp, 4x4, soft top, 2 door, no a/c