OE Quality
60-Day Returns

Gates 90K-39179A Serpentine Belt Drive Component Kit
Reliable Serpentine Belt Drive Kit for Ford E-350, F-150, and F-350
The Gates Accessory Belt Drive Kit 90K-39179A is designed to provide a complete serpentine belt drive solution for select Ford trucks. This kit includes a belt, tensioner, and two idler pulleys engineered to meet the demands of Ford E-350 Super Duty, F-150, and F-350 models.
- Complete serpentine belt drive component kit including belt, tensioner, and two idler pulleys
- Belt outside circumference: 106 inches (2692 mm)
- Belt top width: 0.807 inches (20 mm)
- Tensioner assembly part number: 39179
- Idler pulleys part number: 36491 (two included)
- Compatible with Ford E-350 Super Duty, F-150, and F-350
About the Gates Accessory Belt Drive Kit
The Gates Accessory Belt Drive Kit line offers comprehensive solutions for accessory drive systems, combining high-quality belts, tensioners, and idler pulleys. This kit, part number 90K-39179A, is tailored to maintain optimal belt tension and alignment, ensuring reliable operation of engine accessories in Ford trucks. The components are engineered to precise specifications, including a belt with a 106-inch outside circumference and a 0.807-inch top width, to match factory requirements.
Detailed Product Description
This serpentine belt drive component kit includes a belt (part number K061054), a tensioner assembly (part number 39179), and two idler pulleys (part number 36491). The belt measures 106 inches in outside circumference (2692 mm) and has a top width of 0.807 inches (20 mm), designed to fit the accessory drive system of Ford E-350 Super Duty, F-150, and F-350 models. The tensioner assembly maintains proper belt tension, reducing slippage and wear, while the idler pulleys guide the belt smoothly around engine components.
Common Applications and Issues Addressed
- Replacement of worn or cracked serpentine belts on Ford E-350, F-150, and F-350
- Resolving belt slippage or squealing noises due to tensioner failure
- Addressing accessory drive misalignment caused by faulty idler pulleys
- Preventing engine accessory malfunctions related to belt drive components
- Maintaining proper belt tension for optimal engine performance
Installation Notes and Tips
- Ensure compatibility with Ford E-350 Super Duty, F-150, and F-350 before installation
- Inspect all accessory drive components for wear before replacing the belt drive kit
- Use proper tools to relieve tension on the old belt and install the new tensioner assembly
- Verify belt routing matches factory specifications to avoid misalignment
- Check belt tension and pulley alignment after installation for smooth operation
Quality Assurance and Warranty
Gates manufactures the Accessory Belt Drive Kit 90K-39179A to meet OEM standards for durability and performance. Each component undergoes rigorous quality control to ensure reliable operation in demanding conditions. While specific warranty details may vary, Gates typically offers coverage against defects in materials and workmanship, providing confidence in the longevity of this serpentine belt drive component kit.
| Brand | Gates |
| Part Number | 90K-39179A |
| Position | Accessory Belt Drive Kit |
| Belt 1 Outside Circumference (in) | 106 |
| Belt 1 Outside Circumference (mm) | 2692 |
| Belt 1 Part Number | K061054 |
| Belt Top Width | .807 |
| Belt Top Width | 20 |
| Contents | Belt, Tensioner, 2 Idlers |
| Idler Pulley 1 Part Number | 36491 |
| Idler Pulley 2 Part Number | 36491 |
| Outside Circumference | 106 |
| Outside Circumference | 2692 |
| Tensioner Assembly Part Number | 39179 |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2018 | Ford | E-350 Super Duty | 6.2L | V8 | FLEX | N/A | {K061054, 39179, 36491, 36491}; W/A.C.; Accessory Belt Drive Kit |
| 2017 | Ford | E-350 Super Duty | 6.2L | V8 | FLEX | N/A | {K061054, 39179, 36491, 36491}; W/A.C.; Accessory Belt Drive Kit |
| 2014 | Ford | F-150 | 6.2L | V8 | GAS | N/A | {K061054, 39179, 36491, 36491}; Accessory Belt Drive Kit |
| 2013 | Ford | F-150 | 6.2L | V8 | GAS | N/A | {K061054, 39179, 36491, 36491}; Accessory Belt Drive Kit |
| 2012 | Ford | F-150 | 6.2L | V8 | GAS | N/A | {K061054, 39179, 36491, 36491}; Accessory Belt Drive Kit |
| 2012 | Ford | F-350 | 6.2L | V8 | GAS | N/A | {K061054, 39179, 36491, 36491}; Accessory Belt Drive Kit |
| 2011 | Ford | F-150 | 6.2L | V8 | GAS | N/A | {K061054, 39179, 36491, 36491}; Accessory Belt Drive Kit |
| 2010 | Ford | F-150 | 6.2L | V8 | GAS | N/A | {K061054, 39179, 36491, 36491}; Accessory Belt Drive Kit |
* 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.