Here's a general outline of the process. This is not a comprehensive guide and should not be considered a substitute for a proper repair manual specific to your vehicle. Always consult your owner's manual for specific instructions and torque specifications.
Tools You'll Need:
* New serpentine belt: Make sure you get the correct belt size. Your owner's manual or a parts store should have this information.
* Socket wrench set (metric): You'll need various sizes, likely including 13mm, 15mm, and possibly others.
* Wrench set (metric): Similar to above, for various sizes.
* Ratcheting wrench: Makes things much easier.
* Jack and jack stands: Essential for safety. Never work under a car supported only by a jack.
* Wheel chocks: To prevent the car from rolling.
* Screwdrivers (Phillips and flathead): Possibly needed depending on access.
* Pliers: May be helpful for some belt tensioner releases.
* Gloves: Protect your hands.
* Shop rags or paper towels: To clean up any spills or debris.
* Optional: Belt tensioner tool: Some tensioners require a specialized tool, but often you can use a ratchet and socket to carefully apply pressure. Check YouTube for videos on your specific car's tensioner.
Procedure (General Steps – Consult your repair manual for specifics):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks. Jack up the front of the car and securely support it with jack stands.
2. Locate the Serpentine Belt: Identify the serpentine belt routing around the various pulleys (crankshaft, alternator, power steering pump, air conditioning compressor, etc.). Take pictures or make a diagram *before* removing the belt, as this will be your reference for reinstallation.
3. Loosen Belt Tensioner: This is the most crucial and potentially tricky step. The tensioner needs to be released to allow you to remove the belt. This usually involves using a socket wrench or a special tool to loosen the tensioner pulley. Consult your repair manual for the exact method, as it varies by vehicle. Be careful! The tensioner will spring back when released, so be prepared and have a firm grip.
4. Remove the Old Belt: Once the tension is released, carefully slip the belt off the pulleys.
5. Install the New Belt: Route the new belt onto the pulleys in the same order as the old one (refer to your diagram or photos). Make sure it's seated correctly on all pulleys.
6. Release Tensioner and Check Alignment: Ensure the belt is correctly seated on all pulleys. Tighten the belt tensioner (slowly and carefully).
7. Check Tension: After tightening the belt tensioner, check the belt tension. There should be only slight give (usually around ½ inch to ¾ inch of deflection when you push on the longest span of belt).
8. Lower the Car: Carefully lower the car using the jack.
9. Start the Engine: Start the engine and check for any squeaks or squeals. If you hear any unusual noises, carefully check the belt tension and routing.
Important Considerations:
* Consult a Repair Manual: This is crucial. A Haynes or Chilton manual for your 1999 Pontiac Bonneville SSE will provide detailed instructions with diagrams specific to your vehicle's engine.
* YouTube Videos: Search YouTube for "1999 Pontiac Bonneville SSE serpentine belt replacement." Visual guides can be extremely helpful.
* Safety: Remember safety first. Use jack stands, chocks, and proper tools. If you're not comfortable, seek professional help.
This guide provides a general overview. The exact procedure and specific tools needed may vary slightly. Always refer to your vehicle's repair manual for detailed, accurate instructions. Improper installation can lead to engine damage, so proceed with caution.
