How to Replace Serpentine Belt Tensioner with Pulley 00-10 Mercury Grand Marquis 4.6L
Difficulty: Intermediate · About 30 min · Mercury Grand Marquis
Replace the serpentine belt tensioner and pulley on a 2000-2010 Mercury Grand Marquis with the 4.6L engine.
Tools you will need
- Pipe for leverage
- Flat blade screwdriver
- 10mm socket
- Ratchet
- 3/8 inch drive ratchet
Parts and supplies
- Serpentine belt tensioner
Steps
- Remove the old belt
Familiarize yourself with the routing diagram, attach a 3/8-inch drive ratchet to the tensioner, pull it clockwise to loosen the belt, pull the belt off, then release the tensioner.
- Remove the old tensioner
Remove its 10mm bolt, then pry it off with a flat blade screwdriver.
- Install the new tensioner
Thread a 10mm bolt through it, push it into place, then tighten the bolt.
- Reinstall the belt
Loop it around the A/C, tensioner, water pump, crank, power steering and idler pulleys, double check the routing, attach the 3/8-inch drive ratchet to the tensioner and turn it clockwise, pull the belt onto the alternator, then release the tensioner.
Check your vehicle’s repair manual for exact specifications and fit.