Belt squeals when starting engine below 20 degrees.
How do you tighten the serpentine belt on an Infiniti G-20? on 1996 Infiniti G20
Make sure the belt is in good condition no cracks or contamination. To tighten the belt there is a bolt going through the adjusting bracket loosen it, loosen the bolt at the bottom of the alternator or power steering pump or item in the belt you need to tighten. With the bolts loosened there is a long threaded bolt that as you tighten will take slack out of the belt. Look on Youtube loads of videos for car repair things there you may find something similar.