What Causes Loud Noise Under the Regal Belt Pulley?
2 Answers
Loud noise under the Regal belt pulley is mainly caused by the following reasons: 1. Rapid changes in engine speed; 2. Increased load on the belt; 3. Belt aging; 4. Dirt on the belt or pulley; 5. Incorrect belt tension adjustment. The following methods can solve the issue of loud belt pulley noise: 1. Check whether the accessories driven by the belt have problems such as bearing damage, jamming, looseness, or increased power consumption, and resolve them promptly; 2. Replace the belt or lightly sand the contact surface between the pulley and the belt with 100-grit sandpaper (light sanding is sufficient); 3. Apply 1–2 drops of engine oil to the contact surface between the belt and pulley (this will not cause belt slippage).
I've spent several years working in an auto repair shop, and the most common causes of loud noise under the Regal's pulley are belt looseness or wear and aging. A loose belt will slip and produce a screeching sound, especially during cold starts. Bearing damage is also quite common, particularly in the tensioner or pulley bearings, which can create a creaking noise. Sometimes, foreign objects like small stones or dirt stuck in the belt grooves can also cause noise. I recommend checking the belt's condition immediately for any cracks or deformations. If left unrepaired, a broken belt not only stalls the engine but also affects the air conditioning and power steering, leading to much higher repair costs. Regular maintenance should include inspecting the belt system every 20,000 kilometers. Replacing worn parts can solve the issue—safe driving is more important than anything else, so don't skimp on small expenses and risk bigger problems.
