How do you loosen the tension on a serpentine belt?

Snap a long-handled ratchet or a serpentine belt tool into the square 1/2-in.-drive or 3/8-in.-drive opening. Or use a socket on the hex-shaped protruding nut. Slowly rotate the tensioner arm as far as it will turn. Then release the tension.
A.

How much does it cost to replace a belt tensioner?

The average cost for a drive belt tensioner replacement is between $156 and $295. Labor costs are estimated between $44 and $156 while parts are priced between $112 and $139. Estimate does not include taxes and fees.
  • How much does it cost to replace an idler pulley?

    The average cost for a drive belt idler pulley replacement is between $77 and $181. Labor costs are estimated between $35 and $111 while parts are priced between $42 and $70. Estimate does not include taxes and fees.
  • What is the meaning of tensioner?

    A tensioner is a device that applies a force to create or maintain tension. The force may be applied parallel to, as in the case of a hydraulic bolt tensioner, or perpendicular to, as in the case of a spring-loaded bicycle chain tensioner, the tension it creates.
  • What belts are in a car engine?

    Belts & Hoses
    • Timing Belt. The timing belt is a notched rubber belt that allows the crankshaft to turn the camshaft.
    • Serpentine Belt. Serpentine belts, also known as drive belts, provide power to the air conditioning compressor, power steering pump, cooling fan, air injection pump, and more.
    • Hoses.
B.

What are the signs of a bad serpentine belt?

Symptoms of a Bad or Failing Serpentine/Drive Belt
  • Squealing noise from the front of the vehicle. If you notice a squealing noise coming from the front of your vehicle, it could be from the serpentine belt.
  • Power steering and AC not working. If the serpentine belt completely fails and breaks, then your car will break down.
  • Engine overheating.
  • Cracks and wear on the belt.
  • What happens if the timing belt breaks while driving?

    If the timing belt snaps, they run into each other, causing bent valves (most common), cylinder head or camshaft damage, and possibly piston and cylinder wall damage. While it is possible that no damage could occur from a snapped belt on an interference engine, such a case is unlikely.
  • What are the signs of a bad serpentine belt?

    Symptoms of a Bad or Failing Serpentine/Drive Belt
    • Squealing noise from the front of the vehicle. If you notice a squealing noise coming from the front of your vehicle, it could be from the serpentine belt.
    • Power steering and AC not working. If the serpentine belt completely fails and breaks, then your car will break down.
    • Engine overheating.
    • Cracks and wear on the belt.
  • How often should you change the air filter in your car?

    Maintenance schedules for various makes of vehicles differ on how often the air filter should be changed. On most Chevrolet engines, for example, the recommended change interval is every 45,000 miles, but Ford says it should be done every 30,000 miles on many of its engines.

Updated: 21st November 2019

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