Most engines have one idler and one tensioner pulley, but some units may have more than one idler pulleys. Remove snapring from pulley that retains bearing. You don't need to visit an auto repair shop and spend quite a few bucks on fixing it. Well, I'm up here at the dorm and don't want to fix this is the parking lot by myself in the freezing cold this week, so I'll do it this weekend when I'm back home.Home's about 100 miles away though, and starting yesterday, the idler pulley started squealing pretty bad. The Symptoms Of A Bad Idler Pulley. These parts will wear out over time and have to be replaced. But the issue continues. Most of the people when they hear a screeching noise after starting the car, they think, it will disappear after a few minutes. In most cases, the noise gets even worse. Belt coming off can either be as a result of pulley misalignment, belt misalignment on a pulley, defective tensioner, or bearing wear in the tensioner, idler … If the pulley is making noise, either it's the result of a bearing failure or the spring is not providing the proper tension. Since the idler pulley is no longer stable or fixed onto its mounting, it wobbles and can force the drive belt off the path of the idler pulley. How long can you drive with a bad idler pulley? The average cost for a Chevrolet Trailblazer drive belt idler pulley replacement is between $121 and $131. My AC idler pulley was sounding terrible, and I did not have time to source the 6301 sealed bearings and replace, so here's what I did. If your serpentine belt has never had a squeaky sound before, suddenly there is a squeaky sound, that means you need to replace the belt, buy a new one of the same size. Labor costs are estimated between $35 and $45 while parts are priced at $86. Grinding sound tell that there is a damaged bearing in a driven accessory. The issue is with the serpentine belt, and it can make such squeaking noise for a few reasons. The pulley itself has an outer ring and an inner bearing. Chirping sound is a sign of misalignment of an accessory drive pulley. How to Fix a Squeaky Clothes Dryer (Best Selling Cloth Dryer) Diagnosing the cause of a squeaky clothes dryer is often more difficult and time-consuming than making the actual repair. Since the idler pulley relies on a stable platform to help in its function, a loose or warped pulley mounting bracket can also create problems. A belt tensioner that consists of a bolt plate that mounts on the engine, a spring-loaded arm and a pulley applies tension to the belt. This can also lead to faster wear of the pulley system. Remove tension from idler pulley and remove pulley.