What does the idler pulley do?

The idler pulley is a common part that’s found on the majority of the vehicles on the road. Its primary function is to provide tension and guide the engine drive belt. These belts wrap around the various parts of the engine such as the power steering pump, alternator, water pump etc…

What are the signs of a bad idler pulley?

Signs and Symptoms of a Bad Idler Pulley

Chattering, Squealing, or Chirping Sound.
Corroded Surface.
Excessively Loose Idler Pulley.
A Bad Idler Pulley May Spin Excessively.
Slow to No Spin or Binding.

How do you change a serpentine belt?

Fan belt replacement: Check the tensioner first. Check for excessive movement.
Check the pulley/roller. Rotate the tensioner and slide the drive belt off the pulley/roller.
Measure wear with an app.
The right tools make it a do-it-yourself project.
Remove the belt with a serpentine belt tool.
Place the new belt.

When to change the serpentine belt on a Dodge Charger?

Dodge recommends changing the serpentine belt between 75,000 and 90,000 miles. When the belt wears, cracks develop and it starts to stretch. This results in a loss of efficiency in your accessories as the belt slips on the pulleys. Squealing is commonly heard from slipping belts although water/dirt on the belt can cause similar sounds.

How do you remove the tensioner pulley from the engine?

While holding the tensioner in this position, remove the belt from the most accessible pulley and untangle it out of the engine. Owners with the 4.7 and 3.7 liter engines will need a ratchet with a 15mm socket. Turn the 15mm headed bolt on the tensioner pulley clockwise and remove the belt from the most accessible pulley.

What size Ratchet do I need for belt tensioner?

For owners with the 5.7 liter engine, you will need a 3/8″ ratchet (preferably long-handled). On the tensioner you will see/feel a recessed area where the ratchet is designed to fit into. Once the ratchet is connected, move the tensioner clockwise to release the tension from the belt.