if belt needs tightening, u need a new belt
serpentine belts use a tension pulley that automatically keeps belt tight until belt is worn out or stretched.
Tension is accomplished with a belt tensioner, it is probably defective and needs replaced.
The zd30 has a hydraulic tensioner using an idler pulley to automatically tension the serpentine belt.
You don't tighten it. It has an idler pulley that keeps the proper tension. If this is an old belt and is loose, then it needs replacing. If you have installed a new belt and it is loose, then either you installed the wrong belt or the idler spring is weak and the idler needs replacing.
If it has a serpentine belt - should be automatic through the belt tensioner
A 2002 Nissan Frontier bed will not fit a 2000 Nissan frontier.
The serpentine belt has an easy adjustment. Loosen the nut holding the tensioner wheel and turn the adjusting screw until proper belt tension is achieved. Tighten tensioner wheel nut.
Loosen the belts, unbolt the old alternator, bolt the new one on, tighten the belts back up.
The 2013 Nissan Frontier has .
The 2011 Nissan Frontier has .
The 2010 Nissan Frontier has .
The 2012 Nissan Frontier has .
The 2014 Nissan Frontier has .