Quick answer
Serpentine / Drive Belt Noise: the most common causes are drive belt glazed or worn — slips on pulleys under load producing squeal, tensioner pulley bearing worn — constant squealing/rumbling, water pump, alternator, or ac compressor pulley seized — belt slips over it. Metre Per Second (KPHB, Hyderabad) diagnoses the exact fault and repairs it same-day — typical work runs ₹1,500 – ₹4,000, with free pickup and drop across Hyderabad, OEM-grade parts and a 1-year warranty. Call +91 8555824915.
What causes Serpentine / Drive Belt Noise?
These are the faults we most often find behind this symptom on cars driven in Hyderabad's heat and stop-go traffic:
- Drive belt glazed or worn — slips on pulleys under load producing squeal
- Tensioner pulley bearing worn — constant squealing/rumbling
- Water pump, alternator, or AC compressor pulley seized — belt slips over it
- Belt misaligned on pulleys
- New belt installed incorrectly without tension check
Repairs & indicative pricing (INR)
| Repair | Indicative price |
|---|---|
| Belt inspection & replacement | ₹1,500 – ₹4,000 |
| Belt tensioner replacement | ₹2,000 – ₹6,000 |
| Idler pulley replacement | ₹1,500 – ₹4,000 |
| AC compressor clutch check | ₹1,000 – ₹3,000 |
| Water pump inspection | ₹1,000 – ₹3,000 |
Final price depends on diagnosis. We share a written estimate before any work — no surprises. Free pickup & drop across Hyderabad, OEM-grade parts and a 1-year warranty.
Frequently asked questions
My car squeals on startup or when AC is on — is it the belt?
Squealing on startup that fades after warming is typically a glazed belt slipping on a cold/tight pulley. Squealing specifically when the AC is turned on points to the AC compressor pulley bearing or the belt slipping under the additional AC compressor load. Both should be addressed promptly — a broken belt disables the alternator, power steering, and water pump simultaneously, leaving you stranded.
Related car problems we fix in Hyderabad
Why Hyderabad drivers choose Metre Per Second
- Factory-grade diagnostics — we read the real fault, not just a generic code.
- Free pickup & drop across all of Hyderabad — KPHB, Kukatpally, Miyapur, Hitech City, Gachibowli, Banjara Hills, Secunderabad and more.
- 1-year unconditional warranty on parts and labour.
- Transparent, written estimates — typically 30–50% below authorised dealers.