How to Replace Serpentine Belts 09-14 Ford F-150

Difficulty: Intermediate · About 60 min · Ford F-150

Replace the serpentine belt and A/C stretch belt on a 2009–2014 Ford F-150 by supporting the truck, unloading the tensioner, routing both belts, and verifying alignment.

Steps

1. Raise the truck and remove the shield

   Park on level ground, chock the wheels, and raise the truck at approved lift points. Support it securely on jack stands before working underneath. Remove the underbody shield retainers and lower the shield to expose the belt drive.

2. Remove the old belts

   Note the serpentine belt routing before releasing tension. Rotate the tensioner with a 15 mm socket, slip the belt off the pulleys, and slowly return the tensioner. The installed A/C stretch belt is removed by cutting it off; keep cutters clear of the crank pulley and surrounding wiring.

3. Install the A/C stretch belt

   Position the new stretch belt on the A/C compressor and crank pulleys. Use the specified stretch-belt installation tool and rotate the crankshaft clockwise by hand as directed for this engine, keeping fingers clear of pinch points until the belt is seated in its pulley grooves.

4. Route the serpentine belt

   Follow the routing diagram to place the serpentine belt around each accessory pulley, leaving the tensioner for last. Rotate the tensioner, guide the belt into place, and release it slowly. Inspect every pulley to ensure the belt ribs are centered in the grooves.

5. Reinstall the shield and verify alignment

   Reinstall the underbody shield and all retainers. Start the engine briefly while observing the belts from a safe distance; shut it off immediately if a belt walks off a pulley or makes abnormal noise. Recheck alignment with the engine stopped before lowering the truck.

Check your vehicle’s repair manual for exact specifications and fit.