This procedure covers removal and replacement of the serpentine belt (alternator belt) on the 2011-2014 Ford F-150 with 5.0L Coyote V8 engine.

Warnings

Tools required

Parts

• Serpentine belt × 1 — Motorcraft 8K1886 or equivalent 6-rib belt

Preparation

1. Park vehicle on level ground and set parking brake
2. Allow engine to cool completely if recently operated
3. Open hood and secure with prop rod
4. Locate belt routing diagram on radiator fan shroud or underside of hood. Take a photo for reference if diagram is faded
5. Inspect all pulleys for damage, roughness, or misalignment before proceeding

Procedure

1. 1

   Inspect existing belt and routing
   Examine the current serpentine belt for cracks, glazing, fraying, or missing ribs. Check belt tension and note the routing path around all pulleys including crankshaft, water pump, alternator, A/C compressor, and power steering pump. The 5.0L Coyote uses a single serpentine belt with automatic tensioner.
2. 2

   Locate the belt tensioner
   Identify the automatic belt tensioner on the passenger side of the engine. The tensioner is a spring-loaded pulley assembly that maintains proper belt tension. Locate the 3/8" square drive hole in the tensioner arm that accepts a ratchet or breaker bar.
3. 3

   Release belt tension
   Insert a 3/8" drive ratchet or breaker bar into the square hole on the tensioner arm. Rotate the tensioner clockwise (toward the passenger side) to release tension on the belt. The tensioner should move smoothly without binding. Hold tension in the released position.
   ⚠Tensioner is spring-loaded and will snap back forcefully if released. Maintain firm control of the tool at all times.
4. 4

   Remove serpentine belt
   While holding the tensioner in the released position, slip the belt off the nearest pulley (alternator or tensioner pulley works best). Slowly release the tensioner arm back to its resting position. Remove the belt completely from all pulleys and extract from the engine compartment.
5. 5

   Inspect tensioner and pulleys
   With belt removed, spin each pulley by hand to check for roughness, noise, or excessive play. Inspect tensioner pulley bearing for wear. Check tensioner arm movement for smooth operation through full range of motion. Replace any components showing wear or damage before installing new belt.
6. 6

   Route new serpentine belt
   Begin routing the new belt following the diagram documented earlier. Typical routing for 5.0L Coyote: Start at crankshaft, route to water pump, then alternator, A/C compressor, power steering pump, and finally the tensioner pulley. Leave the tensioner pulley for last to make installation easier. Ensure belt ribs are properly seated in all pulley grooves.
7. 7

   Install belt on tensioner pulley
   Insert the 3/8" ratchet or breaker bar into the tensioner and rotate clockwise to relieve tension. Route the belt over or under the tensioner pulley (according to routing diagram) while holding the tensioner in the released position. Verify belt is fully seated in the pulley groove, then slowly release the tensioner to apply proper tension to the belt.
8. 8

   Verify belt alignment and seating
   Visually inspect the entire belt path to ensure the belt is properly centered on all pulleys and fully seated in all grooves. The belt should not be twisted and should run straight from pulley to pulley. Check that no portion of the belt is riding on pulley edges or misaligned.

Reassembly

1. No disassembly of components was required for this procedure
2. Ensure all tools are removed from engine compartment
3. Close hood securely

Verification

• Start engine and observe belt operation for first 30 seconds. Belt should track smoothly without slipping, squealing, or vibration
• Verify all accessories are functioning: Check alternator charging (battery light should be off), A/C operation, and power steering assist
• Listen for unusual noises from belt area during idle and light acceleration
• After first 100 miles of operation, perform quick visual inspection to ensure belt remains properly seated and aligned
• Monitor charging system warning light on instrument cluster to confirm alternator operation

More procedures for this vehicle