Signs Of A Bad Idler Pulley

This page has free videos, resources, e-books and more dedicated to Timing Belt Tensioner and Signs Of A Bad Idler Pulley!


Posted on

Mute the speaker Listen to this using a male or female voice M/F 

By Gregory Crews

The purpose of the idler pulley is to ensure the belt is routed around the engine components smoothly and without obstructions. A faulty idler pulley can cause damage to the belt and cause components to not work properly. A bad pulley can be replaced in no time with the correct tools.

Mute the speaker Listen to this using a male or female voice M/F When the engine is idling, a bad pulley may make a squealing sound. This is due to the bearings in the pulley going bad. The bearings may also make various other sounds such as clattering or even a rumbling sound, making the vehicle sound as if there was much more wrong than a bad pulley. The sound can be centralized to the faulty pulley to make troubleshooting easier.

Mute the speaker Listen to this using a male or female voice M/F The bearings in a pulley may cause the pulley to freeze or in some cases hard to spin. The best way to determine if the pulley is not moving freely is to take the belt off the pulley and spin it by hand. If the pulley is hard to turn, then it will require replacement. Use caution taking the belt off the pulley. Ensure the vehicle is turned off and the key is out of the ignition.

Mute the speaker Listen to this using a male or female voice M/F Watching the belt as it travels over the pulleys will also determine if a pulley has gone bad. The hardware in the pulley may have deteriorated or the hole in the middle of the pulley may have gotten bigger allowing the pulley to wobble or not move smoothly. The pulley may work loose or keep pushing the belt off the pulley. This will indicate the need for a new pulley.

Mute the speaker Listen to this using a male or female voice M/F In some cases the pulley is fine and does not need to be replaced but the bracket holding the pulley in place may have gotten warped or loose. This will cause the pulley to wobble or force the belt off the pulley path. The pulley is held on by a mounting bracket that is secured to the engine. When the bracket is loose, replacement can be done in no time.

Share on Facebook Share on Twitter Email Gmail Yahoo! More...



Our Most Popular Article




More Timing Belt Tensioner Information

 30l Timing Belt
FREE E-Book
 2e Al Tech Page
FREE E-Book
 Timing Belt Files
FREE E-Book
 Tech Talk Vacc
FREE E-Book
 Installation
FREE E-Book
 B234 Timing Belt
FREE E-Book
 Ati39entlon
FREE E-Book
x