One tip:  With all the pulleys aligned with the mark, it will be
nearly impossible to pull the right side (non-tensioner side) tight
enough to get the belt cogs to mesh with the pulleys.  

The solution is to turn the engine CCW just enough to let the cogs
fall into place.  Then, install the tensioner, and turn the engine
slightly CW again to take up the slack on the pull side of the belt.  

Also, when compressing the tensioner in a vise, add a thick pad of
rubber, a short spring, etc.  You want something with some springiness
that will keep pushing the tensioner in after you tighten the vise a
bit.  There's a tiny orfice in the tensioner that keeps it from
compressing quickly.  If you try to squeeze it in too fast, it'll blow
the piston seal.     The Volvo compressor tool uses a strong spring to
apply constant pressure to the plunger, which lets it retract at it's
own rate.  

If you have the tool (Large impact wrench), remove the crank pulley.
It's a major struggle to thread the belt around the back of the
pulley with it in place.   I've done it once, and I don't think I'll
try it again.  

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