Toyota 99364-21090 Belt, V

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The alternator, power steering pump, and air conditioning compressor drive belts, also known as "fan" belts, are located at the right end of the engine. Their condition and adjustment are critical to the engine's operation. These belts stretch and deteriorate over time due to their composition and the high stresses they are subjected to, necessitating regular inspections. The number of belts used depends on the accessories installed in the vehicle. One belt transmits power from the crankshaft to the alternator and air conditioning, and if the vehicle has power steering, the pump is driven by its own belt. To inspect the belts, turn off the engine, open the hood, and locate the belts at the left end of the engine. Use a flashlight to check each belt for various signs of wear and damage. If any issues are found, replace the belt. To check the tension of each belt, use a Nippondenso or Burroughs belt tension gauge and compare your measurement to the specified drive belt tension for either a used or new belt. If these tools are not available, use the rule of thumb method: push firmly on the belt halfway between the pulleys and measure the deflection. If the alternator/air conditioner compressor belt needs adjustment, loosen the alternator pivot bolt, adjust the belt, and measure the tension again. Adjust the power steering pump belt by loosening the adjustment bolt, pivoting the pump, and repeating until the tension is correct. To replace a belt, remove it and take it to a parts store for a direct comparison. After replacing the belt, ensure it fits properly in the pulleys and adjust as necessary.