How to Replace Idler Pulley 05-10 Chrysler 300
Difficulty: Intermediate · About 75 min · Chrysler 300
Replace the accessory-belt idler pulley on a 2005–2010 Chrysler 300, routing the serpentine belt from the vehicle diagram and checking every rib for correct seating.
Tools you will need
- Flat Blade Screwdriver
- Torque Wrench
- T40 Bit
- 1/2 Inch Breaker Bar
- 3/8 Inch Ratchet
Parts and supplies
- Serpentine belt idler pulley
Steps
- Release the belt tension
Review the under-hood belt-routing diagram before removing the belt. Turn the tensioner with the correct drive tool to relieve tension, then slip the belt off and note its path around each pulley.
- Remove the idler pulley
Pry the cover from the idler fastener without damaging it. Remove the Torx retaining screw and washer, then lift the pulley off and inspect the mounting surface.
- Install the replacement pulley
Place the new pulley in the same orientation and reinstall the fastener and spring washer. Tighten the fastener to the vehicle specification, replace the cover, and spin the pulley by hand to check for smooth rotation.
- Route and tension the serpentine belt
Route the belt according to the diagram, keeping the ribbed side on grooved pulleys and the smooth side on smooth pulleys. Relieve the tensioner, slip the final section into place, then release it slowly and inspect every pulley groove.
Check your vehicle’s repair manual for exact specifications and fit.