What happens when alternator bearings are loose?
My 94 Grqnd Prix is making a wierd noise when I accelerate...Someone told me it sounded like my alternator bearings were loose.
Ask the car repairman...
Metro alternator bearing replacement.
Start-to-Finish... I replace the bearing in a 2000 Metro Alternator. (55 Amp Mitsubishi Alternator) New bearing was only about $6 vs. replacing ...
Alternator bearing noise (before)
this is proton waja 1.6 (M) 2004 EV alternator bearing noise before change
A&A Corvette Brings You: A Discussion About Belt Wear
WeВ get asked quite a bit about how long a belt will last and how do you know if the belt needs to be changed. We have been working with Gates to help educate our customers on the serpentine belt, which is a critical part to a supercharger system.
EPDM belts, installed by original equipment manufacturers on new vehicles since the late 1990s, typically do not show obvious signs of wear, as with Neoprene belts. Cracks and chunk-outs rarely occur, so it is necessary to evaluate belt wear differently. Like tires, EPDM belts wear out gradually, steadily losing rubber material.
NEOPRENE VS. EPDM Older Neoprene belts have a life expectancy of 50-60K miles, and as they wear out, cracks and chunk-outs will occur, as shown below. EPDM belts rarely show these symptoms, even at very high mileage.
As EPDM belts age, they gradually lose rubber material—similar to the way tires wear out. Over a period of 100,000 miles, a belt can lose up to 10% of its rib material. While this may not seem like a lot, the consequences can be significant.
EPDM: SIGNS OF WEAR The diagram below shows how EPDM belts wear as they age. Although the ribs have not become shorter, material has been lost in the valleys of the ribs (indicated in red), making the space between ribs wider. As more material is lost, the pulleys ride deeper into the belt valleys resulting in slip, noise and hydroplaning.
With sufficient material loss, the pulley ribs “bottom out” in the valleys and ride on the belt cord. This reduces the surface contact on the valley sides, where the traction is generated. Wear also increases the effective belt length, lowering the tension in the system, which also reduces traction.
OBVIOUS SIGNS OF WEAR Although EPDM belts do not tend to crack with age, they can still exhibit other symptoms that are caused by problems with the accessory drive—such as tensioner misalignment or failure, pulley misalignment, excessive heat, or bearing failure in one of the other components.
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