2014 Ford F-250 Super Duty Serpentine Belt Routing & Replacement

Quick Answer

For your 2014 Ford F-250 Super Duty, the serpentine belt specifications depend on your engine. The most common engines are the 6.2L V8 gasoline engine and the 6.7L Power Stroke V8 diesel engine. Please verify your engine type before purchasing parts.

6.2L V8 Gasoline Engine

• Belt Length: Approximately 98.0 inches (2489 mm)
• Rib Count: 6-rib
• OEM Belt PN: BC3Z-8620-A
• Aftermarket Cross-Refs:
  • Gates K060980 (or similar, verify length for your specific application)
  • Dayco 5060980 (or similar)
  • Continental Elite 4060980 (or similar)
• Auto-Tensioner PN: BC3Z-6B209-C
• Idler Pulley PN: 8C3Z-8678-A

6.7L Power Stroke V8 Diesel Engine

• Belt Length: Approximately 97.4 inches (2474 mm)
• Rib Count: 6-rib (main drive belt)
  • Note: The 6.7L Power Stroke also uses a separate belt for the secondary accessory drive (e.g., vacuum pump on some models), but this article focuses on the main serpentine belt.
• OEM Belt PN: BC3Z-8620-G
• Aftermarket Cross-Refs:
  • Gates K060974 (or similar, verify length for your specific application)
  • Dayco 5060974 (or similar)
  • Continental Elite 4060974 (or similar)
• Auto-Tensioner PN: BC3Z-6B209-F
• Idler Pulley PN: BC3Z-8678-C

Belt Routing

Before you begin any work, always take a clear photo of your existing serpentine belt routing. This will serve as an invaluable guide during reinstallation.

6.2L V8 Gasoline Engine Routing Description

Starting from the crankshaft pulley at the bottom front of the engine (which typically drives the belt):

1. The belt goes over the crankshaft pulley.
2. From the crankshaft, the belt routes to the bottom side of the A/C compressor pulley (located low on one side of the engine, often passenger side).
3. From the A/C compressor, the belt goes up and over the top of an idler pulley.
4. After the idler, it continues to the top side of the alternator pulley (usually high on the engine).
5. From the alternator, the belt wraps around the top of the power steering pump pulley.
6. Next, it proceeds to the water pump pulley.
7. Finally, the belt runs under the automatic tensioner pulley, which provides the necessary tension to the system before returning to the crankshaft pulley.

6.7L Power Stroke V8 Diesel Engine Routing Description

This engine typically has a more complex routing due to additional accessories and possibly multiple belts. For the main drive belt:

Starting from the crankshaft pulley at the bottom front of the engine:

1. The belt goes over the crankshaft pulley.
2. From the crankshaft, the belt typically routes to the bottom side of the A/C compressor pulley (located low on the passenger side).
3. From the A/C compressor, it will often go up and over a large idler pulley.
4. It then wraps around the alternator pulley (usually high on the driver's side).
5. From the alternator, the belt often routes under another idler pulley.
6. It then goes around the power steering pump pulley.
7. Next, it proceeds to the water pump pulley.
8. Finally, the belt goes under the automatic tensioner pulley, which maintains proper tension, before completing the loop at the crankshaft.

Again, consult your photo and potentially an under-hood diagram for precise routing, as arrangements can vary slightly.

How to Replace the Serpentine Belt

Replacing the serpentine belt on your 2014 Ford F-250 Super Duty is a manageable DIY task, but requires the right tools and caution.

1. Safety First: Ensure the engine is off and cool. Disconnect the negative battery terminal to prevent accidental starting.
2. Locate the Tensioner: Identify the automatic serpentine belt tensioner. It will have a square drive hole (usually 3/8-inch or 1/2-inch).
3. Relieve Tension: Insert a serpentine belt tool or a long 3/8-inch (or 1/2-inch, depending on the tensioner) breaker bar with the appropriate socket into the square drive hole of the tensioner. Apply force in the direction that loosens the belt (this usually involves rotating the tensioner counter-clockwise to pivot it away from the belt).
4. Remove Old Belt: While holding the tensioner open, carefully slip the old belt off one of the pulleys (e.g., an idler or alternator). Once the tension is released, you can remove the belt entirely from all pulleys.
5. Inspect Pulleys: With the belt off, spin each pulley by hand. They should spin smoothly with no wobble or excessive noise. Replace any noisy or wobbly idler pulleys or the auto-tensioner if it feels rough or doesn't provide adequate tension.
6. Route New Belt: Refer to the photo you took earlier or the under-hood diagram. Route the new belt around all pulleys except for one easy-to-access pulley (often an idler or the tensioner itself) to leave some slack.
7. Final Installation: Apply tension to the tensioner again with your tool. While the tensioner is held open, slip the belt over the remaining pulley. Slowly release the tensioner, ensuring the belt seats correctly in all grooves.
8. Double Check: Before starting the engine, visually inspect the entire belt path to ensure it's properly seated in all pulley grooves and that the tensioner is correctly engaging.
9. Reconnect Battery: Reconnect the negative battery terminal.
10. Start Engine: Start the engine and listen for any squealing or unusual noises. Turn the steering wheel lock-to-lock a few times to ensure the power steering pump is working correctly (if applicable).

Replacement Interval

Most manufacturers recommend inspecting the serpentine belt at every oil change and replacing it between 60,000 to 100,000 miles, or every 5 to 7 years, whichever comes first. However, severe driving conditions (such as extreme temperatures, heavy towing, or dusty environments) may necessitate earlier replacement.

Signs of a Failing Belt or Tensioner

Promptly addressing issues with your serpentine belt or tensioner can prevent more significant problems and costly repairs.

Signs of a Failing Serpentine Belt:

• Squealing or Chirping Noises: This is the most common sign. It indicates slipping, which can be caused by a worn belt, misaligned pulleys, or a failing tensioner.
• Visible Cracks or Fraying: Inspect the ribbed side of the belt. Small, superficial cracks are normal with age, but deep cracks, missing chunks, or fraying on the edges mean it's time for replacement.
• Glazed or Shiny Appearance: A glazed or shiny belt surface indicates it's hardened and losing its grip.
• Loss of Power Steering, A/C, or Charging: If the belt breaks, you'll immediately lose power to all belt-driven accessories. Your battery light may come on, and your engine could overheat due to a non-functioning water pump.

Signs of a Failing Automatic Belt Tensioner:

• Excessive Belt Squeal (even with a new belt): If a new belt still squeals, the tensioner might not be applying enough force.
• Belt Slippage: Visible wobbling or flapping of the belt while the engine is running.
• Tensioner Pulley Noise: A growling, grinding, or squealing noise coming from the tensioner pulley itself, indicating worn bearings.
• Free Play/Wobble in Tensioner Pulley: With the engine off, try to wiggle the tensioner pulley by hand. Any significant play or wobble indicates worn bearings or a damaged tensioner.
• Tensioner Arm Not Centered: The indicator on the tensioner (if present) might show that the tensioner arm is outside its normal operating range, indicating it's no longer providing adequate tension.

Find a trusted shop on Repairius.