Here's a general guide. This is not a substitute for a repair manual specific to your vehicle's year and engine. Consult a repair manual for precise details, torque specifications, and diagrams. Variations exist between engine types (e.g., 2.0L vs. 2.4L).
Tools You'll Likely Need:
* Socket wrench set: Various sizes, likely including metric sizes.
* Ratchet: A good quality ratchet will make the job much easier.
* Wrench(es): Open-end or combination wrenches might be necessary for certain bolts.
* Jack and jack stands: Essential for safe working conditions. Never work under a car supported only by a jack.
* Wheel chocks: To prevent the car from rolling.
* New serpentine belt tensioner: Make sure you get the correct part for your Neon's engine.
* New serpentine belt (recommended): Since you're already in there, it's a good idea to replace the belt as well. A worn belt can quickly damage the new tensioner.
* Socket extensions: To reach those hard-to-reach bolts.
* Gloves: To protect your hands.
* Safety glasses: To protect your eyes.
General Steps (Consult your repair manual for specifics):
1. Prepare the vehicle: Park on a level surface, engage the parking brake, and use wheel chocks. Jack up the front of the vehicle and securely support it with jack stands.
2. Locate the tensioner: The tensioner is usually located on the engine's front, near the serpentine belt. It may have a pulley and a pivoting arm.
3. Identify the tensioner's release mechanism: This is crucial. Some tensioners use a bolt that needs to be loosened to release tension, while others might have a lever or other mechanism. Your repair manual will show you exactly how this works on your specific Neon.
4. Release belt tension: Using the appropriate tool (likely a wrench or socket), loosen the tensioner bolt or operate the release mechanism. This will allow you to remove the serpentine belt. You might need to gently pry the belt off the pulleys while releasing the tension.
5. Remove the old tensioner: Once the belt is off, you should be able to remove the bolts holding the tensioner in place. These bolts may be difficult to access, so patience and the right tools are important.
6. Install the new tensioner: Carefully install the new tensioner, ensuring it's correctly aligned and tightened to the manufacturer's specifications (check your repair manual!).
7. Install the new serpentine belt (if replacing): Route the new belt around all the pulleys, following the correct path. Refer to a diagram in your repair manual or observe the path of the old belt before removing it.
8. Re-tension the belt: Once the belt is routed correctly, tighten the tensioner bolt or operate the release mechanism to achieve proper tension. The belt should not be too loose (it will squeal) or too tight (it could cause premature wear). Again, consult your repair manual for correct tensioning. A tension gauge can help ensure the correct tension.
9. Lower the vehicle: Carefully lower the vehicle from the jack stands.
10. Test and double-check: Start the engine and check for any squealing or unusual noises from the belt or tensioner. Visually inspect the belt to make sure it's properly seated on all pulleys.
Important Considerations:
* Repair Manual: This is absolutely crucial. Generic instructions can't account for all the variations between Neon models and engine types.
* Torque Specifications: Tighten bolts to the correct torque specifications as specified in your repair manual. Over-tightening can damage parts, while under-tightening can lead to loosening and failure.
* Safety: Always prioritize safety. Use jack stands, wear safety glasses, and work in a well-lit area.
If you're not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. Improper repair can lead to serious damage and potentially dangerous situations.
