To repair your faulty timing belt tensioner, you should […]
To repair your faulty timing belt tensioner, you should first of all park your vehicle and turn off the engine. Then, open the hood and locate the timing belt. The belt will be on the front of the engine. At this time, it is advisable to take a picture of the timing belt routing with your cell phone. This will make it easier to reinstall the belt if you do not have a diagram of its routing.
Next, locate the timing belt tensioner. Move it in the direction required to loosen the belt. When the belt is loose enough, you will be able to remove it from the pulleys. Start the engine and listen to see if the noise goes away. If the noise remains, it may be the timing belt tensioner.
Usually, running the engine with the belt removed will keep the battery from charging and can set a check engine light. Make sure you keep this to a minimum and turn the engine off once you determine whether the noise changes.
If you have determined that the noise is from within the timing belt cover, then replace the timing belt. However, if the noise went away, then check all of the engine pulleys to see which one was making the noise. Repair the issue and reinstall the belt if you can, or have a certified mechanic resolve the issue.
If your are required to replace the timing belt tensioner, you then need to remove any engine accessories. The AC compressor or power steering pump may interfere with the timing cover. Remove any engine mounts that may interfere. If an engine mount must be removed, you must support the engine with the appropriate equipment. Remove the harmonic balancer. The harmonic balancer may interfere with the timing cover removal. Remove the timing belt cover mounting bolts. And then, remove the timing belt cover. Check the tension on the timing belt. Press on the belt between the pulleys. It should not move more than about 1/4 inch.
If the belt is loose, then the tensioner should be replaced. This is also a good time to check the Rubber Timing Belt. If it shows signs of wear, including cracking or worn-out teeth, then it should be replaced.