Unhook the positive battery cable. Untension the belt. Drain off about a gallon of coolant.
Remove the alternator connector and battery cable on back. Unbolt the 10mm bolt to the back of the alternator.
Remove three bolts from the front of the alternator. Shown here at 3, 6 and 9 o'clock
Remove two more bolts from the tensioner as circled here. (Not the actual tensioner you have, accurate for the bolt location)
Wiggling the tensioner remove it. Keep in mind the lower elbow in the 97 model year is metal and part of the tensioner. Prying gently may help. Prying too hard has been known to break the lower part of the tensioner.
That should get it off with the coolant hoses still attached. If you need them removed, please do so.
Using steel wool clean inside the lower intake manifold and tensioner assembly. Replace the o-ring on the lower elbow of the tensioner with the blue o-ring from the large outlet on the coolant elbows in the package. Lightly lubricate all o-rings with vasoline, oil or a little grease before reinstallation on the motor.