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100K IS a good, typical interval to change serpentine belts (if that is what your diesel has).
You can troubleshoot it easily enough by spraying clean water on the belts while the noise is present. If the noise goes away you have a dry belt...if it doesn't you probably have a worn idler or tensioner.
100K IS a good, typical interval to change serpentine belts (if that is what your diesel has).
You can troubleshoot it easily enough by spraying clean water on the belts while the noise is present. If the noise goes away you have a dry belt...if it doesn't you probably have a worn idler or tensioner.