If your Cavalier's serpentine belt is loose, the problem is *not* that the belt needs tightening. Instead, you need to investigate *why* it's loose. Here are the most likely causes:
* Broken or failing tensioner: This is the most common reason. The spring-loaded tensioner might have failed, rendering it unable to maintain tension. This requires replacing the tensioner.
* Worn or damaged belt: A cracked, frayed, or glazed belt will slip and appear loose. Replace the belt.
* Seized or damaged pulley: A pulley that's seized or has bearing problems will increase friction and cause the belt to slip, appearing loose. The pulley will need to be replaced.
* Incorrect routing: It's possible the belt wasn't routed correctly after a replacement. Consult a repair manual or a diagram to verify the routing.
What you should do:
1. Visually inspect the belt and tensioner: Look for cracks, fraying, or glazing on the belt. Check the tensioner for any obvious damage or signs of leaking.
2. Check all pulleys: Spin each pulley by hand and listen for any unusual noises (grinding, squealing). Look for any obvious damage.
3. If the belt is visibly worn or damaged, replace it. It's inexpensive and easy to do.
4. If the tensioner is damaged or broken, it needs to be replaced. This is more involved and might require specialized tools.
5. If a pulley is damaged, replace it. This is also a more involved repair.
In short: You don't tighten the belt on a 1992 Cavalier; you diagnose and fix the underlying problem causing it to be loose. If you're not comfortable working on your car, take it to a mechanic. Attempting to force a tighter belt onto a damaged tensioner or pulley could cause further damage.
