Drive Belt Idler Pulley Replacement
What is a drive belt idler pulley?
The term “Drive Belt” is a generic term used to describe a set of belts that are used to run engine accessories such as the alternator or power steering pump. These belts must be routed in a manner that prevents contact with other belts or components, necessitating the use of an idler pulley. This helps locate the belt, while allowing it to spin freely.
How does the drive belt idler pulley work?
While the engine is running, the crankshaft pulley is constantly spinning. This provides drive to other mechanisms by means of a belt. The belt will be tightly wrapped around the crankshaft pulley and the accessory pulley, so the belt is unable to slip. Manufacturers use idler pulleys to route the belt around various engine accessories.