How to Replace Serpentine Belt Tensioner 09-14 Ford F-150
Difficulty: Intermediate · About 60 min · Ford F-150
Replace the serpentine belt tensioner on a 2009-2014 Ford F-150.
Tools you will need
- Socket extensions
- 15mm socket
- Jack stands
- Plastic fastener remover
- 10mm socket
- Ratchet
- Floor jack
Parts and supplies
- Serpentine belt tensioner
Steps
- Remove the old tensioner
Raise and support the truck, twist out the underbody shield's four white retainers along with its remaining plastic pins, remove the shield, turn the tensioner counterclockwise with a 15mm socket to release belt tension, slip the belt off the tensioner pulley and the rest of the pulleys, remove the tensioner's two 10mm bolts, then take it out.
- Install the new tensioner
Insert it with its bolt holes aligned, tighten the two 10mm bolts, route the belt over the water pump, alternator and crank pulleys while holding the slack toward the tensioner, turn the tensioner counterclockwise with the 15mm socket to slip the belt over its pulley, then run the engine to confirm the belt tracks correctly before shutting it off and feeling that it is aligned.
Check your vehicle’s repair manual for exact specifications and fit.