An essential maintenance procedure to keep your car’s engine accessories functioning properly is replacing a worn-out serpentine belt. Age, use, and exposure to the environment can all cause serpentine belts to deteriorate over time. Being able to change it yourself can help you avoid future malfunctions and expensive repairs. Here’s how to replace a worn-out serpentine belt, step-by-step instructions included.

Assemble the Necessary Parts and Tools

A new serpentine belt, a belt routing diagram often located under the hood, a socket wrench with the proper socket size, and a breaker bar, if necessary, should be gathered before you begin.

Find the Tensioner for the Serpentine Belt

Typically, the serpentine belt tensioner is situated close to the engine’s front. The pulley that imparts tension to the belt has an arm attached to it. For exact location, refer to your belt routing diagram.

Release the Belt’s Tension

To release the tension in the belt, place the socket wrench into the tensioner pulley bolt and turn it counter clockwise. You will be able to remove the old belt from the pulleys as a result.

Take Off the Previous Serpentine Belt

Remove the old belt from the pulleys with caution. You will need to route the new belt in the same manner, so make note of how the old belt is routed around different pulleys.

Evaluating the New and Old Belts

Make that the new and old belts are the same size and have the same rib pattern before installing the new one. This stage guarantees correct operation and fitting.

Put the New Serpentine Belt in Place

Route the new serpentine belt around the pulleys according to the belt routing schematic. Working your way around, begin at the crankshaft pulley and finish with the tensioner pulley.

Put Some Strain on the Belt

Rotate the tensioner pulley counter-clockwise once more using the socket wrench and breaker bar, if needed. To guarantee a tight fit, slide the replacement belt onto the tensioner pulley and apply tension.

Turn On the Engine and Take a Look

Let the engine run for a few minutes after starting it. Keep an ear out for any strange sounds or vibrations that can point to a belt installation issue. Keep in touch with Diesel Repair Services in Carthage, MO professionals if you feel any further discrepancies.


With enough time and simple tools, you can perform a simple maintenance work like replacing a worn-out serpentine belt. You can make sure the engine accessories on your car keep working well by doing these steps. Consider getting in touch with professional repair services, if you need help with more complicated maintenance jobs or if you run into any problems. They can guarantee your car operates properly and offer expert assistance.