BMW Drive Belt Idler Pulley (75 mm) - 11287578674
Description
Includes encapsulated replacement idler pulley bolt, includes pulley cap
This idler pulley helps guide the belt as the engine is running. Over time the bearing inside this pulley can start to run dry which results in squeaks and other undesirable noises coming from the engine bay. It's best to replace the belts and pulley all at the same time as they wear together.
Please note: Tightening torque for the bolt is 56Nm (~41.5 ft lbs).
The drive belt idler pulley works in conjunction with the tensioner pulley/tensioner assembly to maintain tension on the belt as well as guide the belt. Idler pulleys are also used to achieve ideal belt routing around the engine drive accessories such as the power steering pump, water pump, A/C compressor, and alternator.
The idler pulley is an often overlooked maintenance item but it is just as important as the belt tensioner itself. In most cases it is recommended to replace the idler pulley at the same time as the belt tensioner.
Drive Belt Idler Pulley Failure Symptoms- Visible wear or grooves on pulley
- Belt squealing
- Chirping or grinding sounds coming from pulley bearing
- Odd or uneven belt wear
- Misalignment of pulley when compared to mounting surface
Info
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