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Dayco 89312 Accessory Drive Belt Tensioner Assembly
| Brand | Dayco 89312 |
|---|---|
| Belt Type | Serpentine |
| Direction | Counter Clock Wise |
| Number of Pulleys | 1 |
| Pulley 1 Diameter | 90 |
| Pulley 1 Flat | Y |
| Pulley 1 Width | 27 |
| Type | Automatic |
| Fits | Ford and Mercury · 9 vehicles |
Automatic tensioning. Maintains proper belt tension for consistent accessory drive performance.
Serpentine belt design. Built for smooth, efficient operation in the accessory drive system.
Single-pulley assembly. Simplifies replacement with a compact, integrated design.
Cross-references ACDelco 38171, CARQUEST 38171 and Dorman 419-217 for the same application. See all 15.
Dayco 89312 Accessory Drive Belt Tensioner Assembly
The Dayco 89312 accessory drive belt tensioner assembly is an automatic serpentine belt tensioner built for consistent belt control in the accessory drive system. It is a direct-fit service part for select Ford Escort and Mercury Tracer applications, with OE-style fitment details that support accurate replacement work.
- Accessory drive belt tensioner assembly for serpentine belt systems
- Automatic tensioner design for steady belt load management
- Counter clockwise rotation
- Single pulley design
- Pulley diameter: 90 mm
- Flat pulley surface with 27 mm width
- Fits 1997-2002 Ford Escort
- Fits 1997-1999 Mercury Tracer
Fitment and Application Details
Use the Dayco 89312 when servicing the accessory drive belt system on 1997-2002 Ford Escort and 1997-1999 Mercury Tracer models. This Dayco 89312 tensioner assembly is specified for serpentine belt routing and counter clockwise operation, making it a focused replacement for the listed Ford and Mercury applications.
This part cross-references Gates 38171 for the same application.
Common Problems This Part Can Address
- Belt noise caused by weak or inconsistent tension
- Serpentine belt slippage under accessory load
- Visible belt flutter or unstable belt tracking
- Premature wear on the belt or related drive components
- Loss of proper belt tension in the accessory drive system
Installation Notes and Tips
Verify belt routing, pulley alignment, and rotation direction before installation. Confirm the pulley diameter, flat pulley profile, and width match the original tensioner specification for the vehicle. Inspect the serpentine belt and adjacent accessory drive components for wear before returning the vehicle to service.
Quality Assurance
Dayco is a recognized name in belt drive system components, and this tensioner assembly is built to match the listed application requirements for Ford Escort and Mercury Tracer service work.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2002 | Ford | Escort | N/A | — |
| 2001 | Ford | Escort | N/A | — |
| 2000 | Ford | Escort | N/A | — |
| 1999 | Ford | Escort | N/A | — |
| 1999 | Mercury | Tracer | N/A | — |
| 1998 | Ford | Escort | N/A | — |
| 1998 | Mercury | Tracer | N/A | — |
| 1997 | Ford | Escort | N/A | — |
| 1997 | Mercury | Tracer | N/A | — |
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