Tools You'll Need:
* New Fan Belt: Get the correct size belt for your engine. A local auto parts store can help you identify the correct one based on your engine type.
* Wrench(es): The appropriate size(s) to loosen the tensioner pulley(s). This will vary depending on your engine.
* Socket Set (possibly): May be needed depending on the type of tensioner.
* Gloves: To protect your hands.
* Jack and Jack Stands (recommended): For safer access and stability. Never work under a car supported only by a jack.
* Ratchet and Extensions (Possibly): For added reach to your wrench(es)
* Pliers (Possibly): To help with belt removal/installation
General Steps:
1. Safety First: Disconnect the negative battery terminal. This prevents accidental shorts or electrical shocks. Support the vehicle securely on jack stands.
2. Locate the Tensioner: The fan belt's tension is usually adjusted by a tensioner pulley. Identify this pulley and the bolt(s) that control its position. The location varies slightly depending on the engine.
3. Loosen the Tensioner: Use the appropriate wrench to loosen the tensioner pulley bolt(s). This will release the tension on the fan belt. You may need to use a pry bar (carefully!) or a suitable tool to assist in moving the tensioner pulley.
4. Remove the Old Belt: Once the tension is released, carefully slip the old fan belt off the pulleys. You might need to wiggle it a bit to get it free.
5. Install the New Belt: Carefully route the new fan belt around the pulleys, following the same path as the old belt. Pay close attention to the routing – make sure it runs correctly over all the pulleys, including the crankshaft pulley, water pump pulley, and alternator pulley (if applicable).
6. Tighten the Tensioner: Once the new belt is in place, carefully tighten the tensioner pulley bolt(s). The belt should be snug but not overly tight. There's usually a diagram showing the correct routing.
7. Check Belt Tension: After tightening, check the belt tension. You should be able to press down on the longest span of the belt with your thumb; it should deflect slightly. Consult your manual or a repair guide for the specific tension guidelines.
8. Recheck Everything: Make sure the belt is properly seated on all pulleys and that the tension is correct.
9. Reconnect the Battery: Re-attach the negative battery terminal.
10. Start the Engine: Start the engine and listen for any unusual noises. Check for belt slippage or squeaking.
Important Considerations:
* Engine Type: The specific procedures might vary slightly depending on whether you have a small-block or big-block engine. This greatly influences the location of the pulleys and the tensioning mechanism.
* Diagram: A diagram showing the correct belt routing is invaluable. Your owner's manual or a repair manual should provide this.
* Tension: Too loose and the belt will slip; too tight and it could put excessive stress on the bearings and pulleys. Proper tension is crucial.
If you're not comfortable performing this repair yourself, it's best to take your Impala to a qualified mechanic. This is a relatively simple job, but improper execution can lead to serious engine problems. Remember safety first!
