What to know about the Idler Pulley:
An idler pulley is in charge of guiding and maintaining tension with the drive belt. The drive belt (also known as the serpentine belt) joins the engine to various parts of the vehicle (such as the air conditioning, power steering, and alternator). Power is directed from the engine to these systems via the drive belt. The belt is held in place by the idler pulley, which keeps the tension on the drive belt and guides it.
Facts to Note:
When an idler pulley is changed, it’s a good idea to change the drive belt as well.
How to Fix:
Check engine for noises
Examine the drive belts
Spin the pulley
Change the pulleys if found bad
Inspect for correct operations of the belt
Any time that drive belt upkeep is done on your vehicle, the idler pulley should be checked. Idler pulleys usually wear out with time, so it is a safe precautionary procedure to have your idler pulley changed during any drive belt servicing.
Common symptoms indicating you may need to change the Idler Pulley:
Sounds from the engine
Warning lights are on
Loss of power steering
Car is overheating
Importance of this service:
The idler pulley is in charge for keeping your drive belt aligned, and for maintaining the tension in the drive belt. The drive belt is used to transfer power from the engine to the alternator, power steering, and air conditioning, among other systems. If the driver pulley starts to degrade, the drive belt will be less efficient, and your vehicle will be liable to overheat or operate poorly. If the idler pulley fully breaks, the drive belt will no longer work at all, and your car won’t run.