/live/media/DY/DY_89431_Fro.jpg)
Dayco 89431 Accessory Drive Belt Tensioner Assembly
| Brand | Dayco 89431 |
|---|---|
| Position | Fan, Alternator and Air Conditioning, Alternator and Air Conditioning, and Alternator and Power Steering |
| Belt Type | Serpentine |
| Direction | Clock wise |
| Number of Pulleys | 1 |
| Pulley 1 Diameter | 74 |
| Pulley 1 Flat | Y |
| Pulley 1 Width | 39.25 |
| Type | Automatic |
| Fits | — |
Automatic tensioner assembly. Maintains proper serpentine belt tension for consistent drive performance.
Serpentine belt system component. Built for accessory drive applications with a single pulley design.
Single-pulley design. Uses a flat pulley for smooth belt tracking and reliable operation.
Cross-references CARQUEST 38578, Duralast 89431 and Four Seasons 45830 for the same application. See all 7.
Dayco 89431 Accessory Drive Belt Tensioner Assembly
The Dayco 89431 accessory drive belt tensioner assembly is an automatic serpentine belt tensioner built for clockwise rotation. It uses a single pulley with a 74 mm diameter and a 39.25 mm width, with a flat pulley surface for proper belt tracking in the accessory drive system.
For drivers searching for a serpentine belt tensioner assembly for GM applications, Dayco 89431 provides the OE-style layout needed to maintain belt tension and support consistent accessory operation. This part number is also referenced in cross applications such as Gates 38578 and CARQUEST 38578.
Key Features
- Accessory drive belt tensioner assembly for serpentine belt systems
- Automatic tensioner design for steady belt load control
- Clockwise rotation configuration
- Single pulley design with 74 mm diameter
- Flat pulley face for belt contact
- 39.25 mm pulley width
- Dayco 89431 part number for catalog matching and replacement searches
Detailed Description
Dayco 89431 is an automatic accessory drive belt tensioner assembly used in serpentine belt systems where controlled belt tension is needed to drive engine accessories. The clockwise rotation specification, single-pulley layout, and flat pulley profile are important details when matching the correct replacement to the original belt drive configuration. This part is commonly searched as a serpentine belt tensioner for GM vehicles and related applications, including General Motors 15999618 cross-reference use.
When comparing replacement options, verify pulley diameter, width, rotation direction, and belt type against the original unit. The Dayco 89431 tensioner assembly is a direct-fit style replacement for applications that require this exact accessory drive belt system configuration.
What It Helps Address
- Loose or inconsistent serpentine belt tension
- Belt noise caused by worn tensioner components
- Belt tracking issues in the accessory drive system
- Accessory drive performance problems from a failing automatic tensioner
- Replacement needs for GM accessory drive belt tensioner assembly applications
Installation Notes and Tips
Confirm clockwise rotation, pulley diameter, pulley width, and flat pulley design before installation. Compare the original tensioner assembly to Dayco 89431 and verify the belt routing on the vehicle before removing the old unit. For fitment-based searches, this part is commonly associated with GM accessory drive belt tensioner replacement needs and serpentine belt service on compatible applications.
Quality Assurance
Dayco is a recognized name in belt drive components, and this tensioner assembly is cataloged for OE-style replacement use. Part number 89431 should be matched to the original application details before installation.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| No rows match your filter. | ||||