HomeBelts and Cooling > Accessory Drive Belt System ComponentsFour Seasons 45911 Accessory Drive Belt Idler Pulley Eccentric Cam
Part #: 45911

Four Seasons 45911 Accessory Drive Belt Idler Pulley Eccentric Cam

Eccentric Arm
⚙️ 16 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Eccentric Arm
🚗Fitment: Dodge and Plymouth, Power Ram 50, Ram 50, Challenger, Sapporo, and D50
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Overview of Four Seasons Eccentric Arm Accessory Drive Belt Idler Pulley

The Four Seasons Eccentric Arm Accessory Drive Belt Idler Pulley (Part Number 45911) is designed for precise tension adjustment in serpentine belt systems. This component is compatible with Dodge Challenger, D50, Power Ram 50, and Ram 50 models, ensuring reliable performance in these vehicles.

  • Part Number: 45911
  • Brand Line: Eccentric Arm
  • Material: Aluminum and steel construction for durability
  • Drive Belt Type: Serpentine
  • Outside Diameter: 3.8 inches
  • Inside Diameter: 0.47 inches
  • Depth: 0.69 inches
  • Mounting Hole Diameter: 0.665 inches
  • Mount Hole Quantity: 2
  • Overall Width: 1.71 inches
  • Hub Offset: 1 inch
  • Style: Eccentric arm
  • Bolt and washer not included

Detailed Product Description

This accessory drive belt idler pulley is engineered with an eccentric arm style, allowing for precise adjustment of belt tension in serpentine belt systems. Constructed from a combination of aluminum and steel, it offers a balance of strength and corrosion resistance. The pulley features a 3.8-inch outside diameter and a 0.47-inch inside diameter, with a depth of 0.69 inches, making it suitable for specific belt routing requirements. The mounting hole diameter of 0.665 inches and two mounting holes ensure secure installation. The 1-inch hub offset and 1.71-inch overall width provide the necessary clearance and alignment for optimal belt operation.

About the Eccentric Arm Product Line

The Four Seasons Eccentric Arm product line focuses on components designed to provide adjustable tensioning solutions for accessory drive belt systems. This idler pulley is part of that line, offering a reliable eccentric cam mechanism that allows for fine-tuning belt tension, which is critical for maintaining proper belt alignment and preventing premature wear in Dodge Challenger, D50, Power Ram 50, and Ram 50 vehicles.

Common Applications and Problem Solving

  • Maintains proper serpentine belt tension to prevent slipping
  • Reduces belt noise caused by improper tension
  • Prevents premature wear of belts and pulleys
  • Ensures smooth operation of accessory drive components
  • Addresses misalignment issues in belt routing

Installation Notes and Tips

  • Compatible with Dodge Challenger, D50, Power Ram 50, and Ram 50 models
  • Bolt and washer are not included; use existing hardware or source separately
  • Ensure proper alignment of the eccentric arm during installation for accurate tension adjustment
  • Verify mounting hole sizes and spacing before installation
  • Inspect serpentine belt condition when replacing the idler pulley

Quality Assurance and Warranty

Manufactured by Four Seasons, this idler pulley meets industry standards for durability and performance. The combination of aluminum and steel materials provides corrosion resistance and structural integrity. While specific warranty details are not provided, Four Seasons products typically adhere to quality assurance protocols to ensure reliable operation in compatible Dodge vehicles.

BrandFour Seasons
Part Number45911
PositionEccentric Arm
Bolt And Washer IncludedNot Included
Depth.69
DescriptionIdlers / Tensioners
Drive Belt TypeSerpentine
Hub Offset IN1
Inside Diameter.47
Length3.8
MaterialAluminum / Steel
Mount Hole Qty2
Mounting Hole Diameter0.665
Outside Diameter3.8
Overall Width IN1.71
StyleEccentric Arm
TypePulley Part

This part fits 16 vehicles. Search below:

YearMakeModelPositionNotes
1986DodgePower Ram 50N/A1" Offset; Eccentric Arm
1986DodgeRam 50N/A1" Offset; Eccentric Arm
1985DodgePower Ram 50N/A1" Offset; Eccentric Arm
1985DodgeRam 50N/A1" Offset; Eccentric Arm
1984DodgePower Ram 50N/A1" Offset; Eccentric Arm
1984DodgeRam 50N/A1" Offset; Eccentric Arm
1983DodgeChallengerN/A1" Offset; Eccentric Arm
1983DodgePower Ram 50N/A1" Offset; Eccentric Arm
1983DodgeRam 50N/A1" Offset; Eccentric Arm
1982DodgeChallengerN/A1" Offset; Eccentric Arm
1982DodgeD50N/A1" Offset; Eccentric Arm
1981DodgeChallengerN/A1" Offset; Eccentric Arm
1981DodgeD50N/A1" Offset; Eccentric Arm
1980DodgeChallengerN/A1" Offset; Eccentric Arm
1980DodgeD50N/A1" Offset; Eccentric Arm
1979DodgeChallengerN/A1" Offset; Eccentric Arm

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

111459111407011157366818510019145147191901192097482361203220137008840112394131476459114702315646906042A79748EC0002EC0002CPI120

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.