* Alternator Belt: This is the most common culprit. A worn, glazed, or loose alternator belt will squeal, especially when under load (driving). The engine's power demands increase while driving, causing the belt to slip and squeal. The squeal stops when you brake because the engine load is reduced.
* Power Steering Belt (if applicable): If your Prelude has power steering, a similar issue with the power steering belt could be causing the noise. Again, the squeal would be worse under load and stop when the load is removed.
* Serpentine Belt (if applicable): Some models used a serpentine belt that drives multiple accessories. If this is the case, it's the most likely culprit.
Troubleshooting Steps:
1. Visual Inspection: Open the hood and carefully inspect all belts. Look for:
* Cracks or fraying: This indicates wear and tear.
* Glazing: A shiny, smooth surface means the belt is losing its grip.
* Loose Belt: Check if the belt is loose by trying to move it slightly with your fingers. It should have a little give but shouldn't be floppy.
2. Listen Carefully: Try to pinpoint the location of the squeal. This can help determine which belt is the problem.
3. Spray Water Test (Use Caution): With the engine running, carefully spray a small amount of water (NOT on the alternator or any electrical components) onto the belts one at a time. If the squeal temporarily stops when you spray a particular belt, that's your likely culprit. Be extremely cautious doing this; keep your hands and body away from moving parts.
If you determine it's a belt problem:
* Replacement: The best solution is to replace the affected belt(s). They are relatively inexpensive and easy to replace (though you'll need some basic tools). You can find replacement belts at most auto parts stores. Make sure to get the correct size and type.
* Belt Tensioner: If the belt is too loose despite being new, the belt tensioner may be faulty and need replacement as well.
Important Considerations:
* Safety First: If you're not comfortable working on your car, take it to a mechanic. Ignoring a squealing belt could lead to more serious problems, such as belt failure, which can damage engine components.
* Correct Belt Routing: If you replace a belt, make absolutely sure to route it correctly. Incorrect routing can damage the belt and other components. Consult a repair manual or online resources for your specific model.
Ignoring the squeal will likely lead to more problems and potentially strand you. Address this issue promptly.
