Belts and hoses operate in a hot engine compartment and can deteriorate with age, heat and use. Cracking, fraying, swelling or leakage are signs that a component should be evaluated.
Belts
Many vehicles use a serpentine or accessory drive belt to power components such as the alternator, water pump or air-conditioning compressor. Belt layout and replacement intervals vary by vehicle.
Hoses
Cooling-system hoses carry hot coolant under pressure. Rubber can harden, crack, swell or become damaged at connections. Other fluid and vacuum hoses may also affect vehicle operation.
What an inspection looks for
- Cracks, fraying or missing belt material
- Glazing, contamination or unusual belt noise
- Hose swelling, cracking, softness or hardening
- Leaks, residue or damaged clamps and connections
- Vehicle-specific replacement requirements
Avoid one-size-fits-all intervals
Replacement timing varies by vehicle. Manufacturer guidance, mileage, age and the actual condition of the belts and hoses should determine when service is needed.