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Dayco 5081373 Serpentine Belt - Main Drive
Dayco Serpentine Belt for Dual-Alternator Ford Trucks
The Dayco 5081373 serpentine belt is built for accessory drive systems that demand consistent grip and stable operation. It is a K-section, 8-rib belt made from EPDM with aramid reinforcement for durability in demanding engine bay conditions.
Compatible with Ford Excursion, Ford F-250 Super Duty, and Ford F-350 Super Duty applications equipped with dual alternators, this belt is sized for the main drive position and matches the specified accessory drive layout.
Key Features
- Part number 5081373
- EPDM construction with aramid reinforcement
- 8-rib K-section profile for accessory drive systems
- Black belt with straight rib profile
- Effective length: 137.32 in. (3487.93 mm)
- Outside circumference: 137.95 in. (3503.93 mm)
- Top width: 1.10 in.
- Operating temperature range: -45°F to 212°F
- Meets SAE J1459 and SAE J2432 standards
Detailed Description
Dayco 5081373 is a serpentine belt for the main drive position in Ford accessory drive belt system components. It is specified for 2001-2003 Ford Excursion, 1999-2003 Ford F-250 Super Duty, and 1999-2003 Ford F-350 Super Duty models equipped with dual alternators. This part cross-references Ford 1C2E-8620-MA and Motorcraft JK8-1376 for the same application.
The EPDM belt material and aramid reinforcement support stable belt tracking and wear resistance in high-load accessory drive setups. The 8-rib, straight-rib design is sized to maintain proper contact across the pulley system, while the listed temperature range covers cold-weather starts and elevated underhood heat.
What This Belt Helps Address
- Squealing or slipping from a worn accessory drive belt
- Cracking, glazing, or rib wear on the existing serpentine belt
- Loss of belt tension or inconsistent pulley engagement
- Drive issues in dual-alternator Ford truck applications
- Replacement needs for a main drive belt at service interval
Installation Notes and Tips
Verify pulley count, rib count, and belt routing before installation. This belt is listed for the main drive position on dual-alternator-equipped Ford Excursion, F-250 Super Duty, and F-350 Super Duty models, so confirm the vehicle’s accessory layout matches the fitment data. Inspect idlers, tensioner operation, and pulley alignment at the same time to help prevent premature belt wear.
Quality Assurance
Dayco manufactures this serpentine belt to SAE J1459 and SAE J2432 standards, with EPDM construction and aramid reinforcement for consistent service in accessory drive applications.
| Brand | Dayco |
|---|---|
| Part Number | 5081373 |
| Material | Epdm, aramid reinforced |
| Top Width | 1.10 |
| Color | Black |
| Effective Length | 137.32 |
| Effective Length | 3487.93 |
| Outside Circumference | 137.95 |
| Outside Circumference | 3503.93 |
| Rib Quantity | 8 |
| Cross Section | K-section |
| Maximum Operating Temperature | 100 |
| Maximum Operating Temperature | 212 |
| Minimum Operating Temperature | -42.7 |
| Minimum Operating Temperature | -45 |
| Rib Depth | Standard |
| Rib Profile | Straight rib |
| Standards | Sae j1459, sae j2432 |
This part fits 13 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2003 | Ford | Excursion | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 2003 | Ford | F-250 Super Duty | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 2003 | Ford | F-350 Super Duty | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 2002 | Ford | Excursion | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 2002 | Ford | F-250 Super Duty | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 2002 | Ford | F-350 Super Duty | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 2001 | Ford | Excursion | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 2001 | Ford | F-250 Super Duty | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 2001 | Ford | F-350 Super Duty | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 2000 | Ford | F-250 Super Duty | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 2000 | Ford | F-350 Super Duty | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 1999 | Ford | F-250 Super Duty | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
| 1999 | Ford | F-350 Super Duty | 7.3L | V8 | Main Drive | Compatible with vehicles equipped with dual alternators. |
* 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.