
Roadmax 6K640AP Serpentine Belt
Reliable Automotive V-Ribbed Belt for Multiple Vehicle Models
The Roadmax 6K640AP Automotive V-Ribbed Belt (Standard) is engineered to provide consistent performance and durability for a range of vehicles including Buick, Ford, Lincoln, Subaru, and Volvo models. Designed with precision, this serpentine belt ensures efficient power transmission to accessory components.
- Constructed from durable EPDM material for enhanced heat and wear resistance
- 6-rib design with a top width of 20 mm (.807 inches) for optimal grip and flexibility
- Polyester cord material for improved tensile strength and longevity
- Cross section designation K, suitable for standard automotive accessory drive systems
- Effective length of 1627 mm (64.07 inches) and outside circumference of 1641 mm (64.625 inches)
About the Roadmax Automotive V-Ribbed Belt (Standard) Line
The Roadmax Automotive V-Ribbed Belt (Standard) product line focuses on delivering reliable serpentine belts designed to meet OEM specifications for standard accessory drive systems. This line emphasizes material quality and precise dimensions to ensure compatibility and performance across various vehicle makes and models, including the 6K640AP part number.
Technical Details and Compatibility
The 6K640AP serpentine belt features a 6-rib configuration with a K cross section, making it suitable for automotive applications requiring a standard V-ribbed belt. Its EPDM construction offers resistance to heat, ozone, and wear, while the polyester cords provide the necessary tensile strength to maintain belt integrity under load. With an effective length of 1627 mm and a top width of 20 mm, this belt fits accessory drive systems on vehicles such as the Ford F-150, Lincoln Mark LT, Subaru Outback, Buick Regal, and Volvo 850 and 960 models.
Common Applications and Problem Solving
- Replacement for worn or cracked serpentine belts causing accessory slippage
- Restores proper function to power steering, alternator, and air conditioning systems
- Addresses belt noise issues due to glazing or stretching
- Prevents belt failure that can lead to engine overheating or battery drain
- Ensures consistent accessory drive performance in Ford Bronco II and Subaru Legacy vehicles
Installation Notes and Tips
When installing the Roadmax 6K640AP belt, ensure the correct routing according to the vehicle’s service manual. Inspect pulleys and tensioners for wear or damage before installation to avoid premature belt failure. Proper tension adjustment is critical for optimal belt life and accessory operation. Use appropriate tools to relieve tension and avoid twisting the belt during installation.
Quality Assurance and Warranty
Roadmax serpentine belts are manufactured to meet industry standards for durability and performance. The 6K640AP belt undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details are not provided, Roadmax products typically adhere to manufacturer guidelines for replacement in case of defects.
| Brand | Roadmax |
| Part Number | 6K640AP |
| Position | Automotive V-Ribbed Belt (Standard), Alternator and Water Pump, Fan, Alternator and Air Conditioning, and Fan, Air Conditioning and Power Steering |
| Material | Epdm |
| Top Width | .807 |
| Top Width | 20 |
| Cord Material | Polyester |
| Cross Section Designation | K |
| Effective Length | 1627 |
| Effective Length | 64.07 |
| Outside Circumference | 1641 |
| Outside Circumference | 64.625 |
| Type | Automotive v-ribbed belt (standard) |
| Rib Quantity | 6 |
This part fits 42 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2025 | Ford | F-150 | 5.0L | V8 | FLEX | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2024 | Ford | F-150 | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2023 | Ford | F-150 | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2022 | Ford | F-150 | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2021 | Ford | F-150 | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2020 | Ford | F-150 | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2019 | Ford | F-150 | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2018 | Ford | F-150 | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2017 | Ford | F-150 | 5.0L | V8 | FLEX | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2016 | Ford | F-150 | 5.0L | V8 | FLEX | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2015 | Ford | F-150 | 5.0L | V8 | FLEX | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2014 | Ford | F-150 | 5.0L | V8 | FLEX | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2014 | Lincoln | Mark LT | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2014 | Subaru | Legacy | 3.6L | H6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 2014 | Subaru | Outback | 3.6L | H6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 2013 | Ford | F-150 | 5.0L | V8 | FLEX | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2013 | Lincoln | Mark LT | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2013 | Subaru | Legacy | 3.6L | H6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 2013 | Subaru | Outback | 3.6L | H6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 2012 | Ford | F-150 | 5.0L | V8 | FLEX | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2012 | Lincoln | Mark LT | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2012 | Subaru | Legacy | 3.6L | H6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 2012 | Subaru | Outback | 3.6L | H6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 2011 | Ford | F-150 | 5.0L | V8 | FLEX | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2011 | Lincoln | Mark LT | 5.0L | V8 | GAS | Alternator and Water Pump | Automotive V-Ribbed Belt (Standard) |
| 2011 | Subaru | Legacy | 3.6L | H6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 2011 | Subaru | Outback | 3.6L | H6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 2010 | Subaru | Legacy | 3.6L | H6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 2010 | Subaru | Outback | 3.6L | H6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 1994 | Volvo | 850 | 2.4L | L5 | GAS | N/A | W/Original Belt Routing; Automotive V-Ribbed Belt (Standard) |
| 1994 | Volvo | 960 | 2.9L | L6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 1993 | Volvo | 850 | 2.4L | L5 | GAS | N/A | W/Original Belt Routing; Automotive V-Ribbed Belt (Standard) |
| 1993 | Volvo | 960 | 2.9L | L6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 1992 | Volvo | 960 | 2.9L | L6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 1991 | Ford | Aerostar | 3.0L | V6 | GAS | Fan, Alternator and Air Conditioning | Late; Automotive V-Ribbed Belt (Standard) |
| 1991 | Ford | Ranger | 3.0L | V6 | GAS | Fan, Alternator and Air Conditioning | Late; Automotive V-Ribbed Belt (Standard) |
| 1987 | Buick | Regal | 3.8L | V6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 1987 | Ford | Ranger | 2.3L | L4 | DIESEL | Fan, Air Conditioning and Power Steering | Automotive V-Ribbed Belt (Standard) |
| 1986 | Buick | Regal | 3.8L | V6 | GAS | N/A | Automotive V-Ribbed Belt (Standard) |
| 1986 | Ford | Ranger | 2.3L | L4 | DIESEL | Fan, Air Conditioning and Power Steering | Automotive V-Ribbed Belt (Standard) |
| 1985 | Ford | Bronco II | 2.3L | L4 | DIESEL | Fan, Air Conditioning and Power Steering | Automotive V-Ribbed Belt (Standard) |
| 1985 | Ford | Ranger | 2.3L | L4 | DIESEL | Fan, Air Conditioning and Power Steering | Automotive V-Ribbed Belt (Standard) |
* 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.