tightening serpentine belt

[sfjose]

I've searched most of the threads and found a lot of information about tightening the serpentine belt on my 1988 300e.

I plan on changing all, belt, pulley, tensioner in the very near future-within a couple of weeks or so.

My tensioner seems to have had it. I loosen the #16 bolt (or 19) all the way, then I turn the nut on my tensioner but nothing happens- either way.

Is there a temporary way in which I can tighten my belt? workaround? or some other means? I like everything I see about the design on my 300e (after growing up with Chevys) in terms of design and repair until I ran into this issue.

thanks a bunch.