Mitsubishi Repair: 91 Galant PS Belt, alternator belt, serpentine belt

Question
I have a loose, worn PS belt that needs to be replaced in my 91 Galant.  It looks like I need to remove the serpentine belt before I can get to the PS belt, but I can't seem to locate a belt tensioner.  It looks like the alternator can be pivoted up to loosen the belt, but how can I be sure I have the belt tight enough when I put it back on?

Is there an easier way to do this?  Thanks!

Answer
Beverly,
There is at least one tensioner bolt on the alternator that needs to be loosened in order to replace the belt.  And you're correct, once the alternator tensioner bolt is loosened, you can pivot it forward to remove the tension on the belt.  I would highly recommend checking your local auto parts store to see if they have a service manual for your car.  That will tell you all you need to know in order to change your belts.

You can gauge the tension on the alternator belt before you remove it.  Simply push down in the middle of the belt to see how far it flexes; this is sometimes called belt deflection distance.  You can even use a ruler to measure more accurately how much the belt deflects.  When you get your power steering belt on and its time to put tension back on the alternator, you can use this method to gauge tension on the belt once your tighten it back up.

But the true test is when you start your car after you get everything is back on.  If you hear a squealing noise and/or your car runs poorly, then you probably need more tension.  You may even see several lights on your gauge stay illuminated if the alternator belt is not on tight enough.
Good luck!