This will make it easier to reinstall the belt if you do not have a diagram of its routing. Tip: Take a picture of the serpentine belt routing with your cell phone.The belt will be on the front of the engine. Step 2: Open the hood and locate the serpentine belt. Step 1: Park your vehicle and turn off the engine If the noise goes away then the noise is coming from one of the engine accessories. You should remove the serpentine belt and start the vehicle and see if the noise remains the same. Since there are many other parts located at the front of the engine that can make similar noises to a failing tensioner, it is important to isolate the noise. Timing belt tensioner ( timing kit if doing a complete job).If you are going to replace the tensioner, it is also a good time to replace the timing belt and the related parts. Having all of the necessary materials prior to starting the job will make it go more efficiently. Part 3 of 6: What you will need to diagnose the problem This is because the valve timing can become out of sync due to the belt not being tight. The check engine light can come on and set a code for a valve timing problem. Though noise is the most common symptom, a loose timing belt can also cause a check engine light. Symptom 3: Check engine light illuminated. This can cause a slapping or knocking noise. If the tensioner is not keeping the belt tight, the belt can come loose and hit various parts inside of the timing cover, including the cover itself. If the pulley bearing completely fails, it can also cause a squealing or even a grinding noise. When the tensioner or tensioner pulley fails, the loss of tension can cause the belt and pulleys to make high-pitched rattling or chirping noises. Symptom 1: Squealing, rattling, or chirping. When a timing belt tensioner fails, it can result in a number of different symptoms. There are two main types of belt tensioners. As the belt stretches it can become loose, so the tensioner needs to adjust the belt as needed to keep it tight. Over time, due to age and heat, the belt will stretch out. The timing belt is a rubber belt that runs over and through a series of pulleys and gears. The timing belt tensioner is used to do just that - keep tension on the timing belt. Part 1 of 6: Purpose of the belt tensioner Knowing some of the signs of a bad belt tensioner can help you to prevent serious engine damage due to a timing belt failure. If the tensioner is bad, it can cause the belt to come loose or cause the pulley to seize, making the belt come off. One other common problem is the belt tensioner. The belt can break due to a number of reasons, but the most common is age. The timing belt is a critical part of the automotive engine if it breaks, it can cause some serious damage.
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