Dayco 89590 Accessory Drive Belt Idler Pulley

Overview of Dayco Accessory Drive Belt Idler Pulley 89590

The Dayco Accessory Drive Belt Idler Pulley 89590 is engineered for reliable performance in Mercedes-Benz vehicles. Designed specifically for models such as the C63 AMG, E350, and ML550, this idler pulley supports the serpentine belt system to maintain proper belt tension and alignment.

• Constructed from durable polymer material for long-lasting use
• Features 6 grooves compatible with serpentine belts
• Bearing inner diameter of 16.8 mm and bearing width of 12 mm
• Supports a maximum belt width of 6 ribs
• Includes a single bearing for smooth operation

Technical Details and Specifications

The Dayco 89590 idler pulley is designed with precision polymer construction to withstand the demands of accessory drive belt systems. It has 6 grooves to accommodate serpentine belts commonly used in Mercedes-Benz models like the CLS550 and GLK350. The bearing specifications include a 16.8 mm inner diameter and 12 mm width, ensuring proper fit and rotation. This pulley supports belts up to 6 ribs wide, making it suitable for a wide range of accessory drive configurations.

Compatible Mercedes-Benz Models

This accessory drive belt idler pulley is compatible with various Mercedes-Benz vehicles, including but not limited to:

• C63 AMG, C300, C350
• CL63 AMG, CL550
• CLK63 AMG, CLK350, CLK550
• CLS63 AMG, CLS550
• E63 AMG, E350, E550
• G550, GL450, GL550
• GLK350, ML63 AMG, ML350, ML550
• R350, S63 AMG, S400, S550
• SL63 AMG, SL550, SLK280, SLK300, SLK350
• SLS AMG

Common Applications and Problem Resolution

The Dayco 89590 idler pulley is used to maintain proper tension and routing of the serpentine belt in the accessory drive system. It helps address issues such as:

• Excessive belt noise due to misalignment
• Premature belt wear or damage
• Loss of belt tension affecting accessory performance
• Vibration or pulley bearing failure
• Accessory drive system inefficiency

Installation Notes and Tips

When installing the Dayco 89590 idler pulley, ensure the serpentine belt is properly routed according to the vehicle’s belt diagram. Verify the bearing rotates smoothly without resistance or noise. Use appropriate tools to avoid damaging the polymer pulley surface. It is recommended to inspect the entire accessory drive belt system for wear and replace any worn components simultaneously.

Quality Assurance and Warranty

Dayco manufactures the 89590 idler pulley to meet OEM specifications for Mercedes-Benz vehicles. The polymer material and bearing assembly are tested for durability and performance under typical operating conditions. This part comes with a limited warranty covering defects in materials and workmanship, providing confidence in its reliability for accessory drive belt system maintenance.