What causes a belt to start to shred?
TOM Another possibility is a bad idler pulley or tensioner pulley. Those are sort of “dummy” pulleys that are used to alter the direction of the belt. If a bearing goes bad on one of those pulleys, it tends to tilt, and that could cause the belt to shred.
What causes a crankshaft pulley to shred a belt?
If a bearing goes bad on one of those pulleys, it tends to tilt, and that could cause the belt to shred. RAY The worst possibility (for you — if your mechanic has kids with tuition payments due, this will be good news for him) is the crankshaft pulley itself.
How to tell if your car needs a new timing belt?
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TOM Another possibility is a bad idler pulley or tensioner pulley. Those are sort of “dummy” pulleys that are used to alter the direction of the belt. If a bearing goes bad on one of those pulleys, it tends to tilt, and that could cause the belt to shred.
How to identify the teeth on a timing belt?
You should also look for identifying numbers and/or letters on the pulleys themselves to help in the timing belt tooth profile identification. Count the number of teeth on the timing belt. I suggest marking one tooth on the timing belt with some sort of identification so that you have a starting point for the tooth count.
What is the difference between rubber and polyurethane timing belts?
Note the construction of the timing belt. Rubber construction is extremely flexible while a polyurethane construction is plastic like and has little flexibility Measure the pitch (see diagram). This is the distance in millimeters (mm) and/or inches between the center of the crown of one tooth and the center of the crown of the tooth adjacent to it.
How to identify a polychain GT style timing belt?
If the valley between the teeth is flat than it is and PolyChain GT style timing belt. You should also look for identifying numbers and/or letters on the pulleys themselves to help in the timing belt tooth profile identification.
Can a broken AC compressor cause the serpentine belt to snap?
If the AC clutch bearing seizes while the AC compressor is not operating, the belt can snap then as well. Replacing the serpentine belt tensioner and idler pulley at the same time as the belt is always a good idea. They wear out too!
What causes a serpentine belt to get stuck?
The main reason, in most cases, will be a stuck pulley from one of the devices (alternator, AC compressor, power steering pump etc) or a tensioner. A stuck pulley is mostly caused by a worn out bearing. The belt slides over a motionless pulley causing extensive friction, heat and the recognizable sound.
If a bearing goes bad on one of those pulleys, it tends to tilt, and that could cause the belt to shred. RAY The worst possibility (for you — if your mechanic has kids with tuition payments due, this will be good news for him) is the crankshaft pulley itself.
The main reason, in most cases, will be a stuck pulley from one of the devices (alternator, AC compressor, power steering pump etc) or a tensioner. A stuck pulley is mostly caused by a worn out bearing. The belt slides over a motionless pulley causing extensive friction, heat and the recognizable sound.
If the AC clutch bearing seizes while the AC compressor is not operating, the belt can snap then as well. Replacing the serpentine belt tensioner and idler pulley at the same time as the belt is always a good idea. They wear out too!
Why does the serpentine belt keep shredding?
Serpentine belt keeps shredding tensioner drive belts (ex… The serpentine belt keeps shredding off on the engine side (one groove at a time). I replaced both the number two idler pulleys that were making noise. Not sure why the belt is still coming apart. I think it might be the belt tensioner. Hi.
What to do if your tensioner belt is shredding?
Have a technician remove the belt and make sure all of the other components spin freely at the pulley. The technician will be able to determine if the belt is shredding due to misalignment. The repair cannot be complete without replacing the shredded belt as well. Once the drive belt starts to deteriorate, its life is shortened dramatically.