Normally the alternator requires two deep groove ball bearings mounted on the rotor shaft. The bearings mounted on the drive end (pulley side) locate the rotor. Usually, these would be SKF sizes 6303, 6302 or 6203.
Kill the Engine. The first thing you should after you check for potential alternator issues is to turn off your car engine, and then check the state of the bearings.
Lose the Belt. Once you switch off the engine, raise the hood.
Inspect the Bearings.
Resolve the Issue.
What happens if alternator bearing fails?
When the bearings fail, the rotor will not spin efficiently and can eventually seize. Usually an alternator with bearings failure makes a loud grinding noise. If you suspect this problem, it’s only a matter of time before the alternator gives up.
Can you lubricate alternator bearings?
You can lubricate an alternator, but you need to consider: The type of lubricant. The method of pumping. The environment the lubricant is stored in Most lubricant products will specify the lubricant type and relubrication frequency and quantities on the label, but it is important to never mix lubricant types.
Where is the alternator bearing located? – Related Questions
Can I spray WD40 in my alternator?
You wouldn’t want to clean the alternator with WD40, as it would weaken the winding insulation. Hence, it can further cause some damages to the motor. Again, spraying WD40 directly to the alternator may ruin it, as the liquid may get to spots where it shouldn’t get to and cause harm.
How much does it cost to replace alternator bearings?
The cost for the parts varies greatly depending on the type of vehicle but will usually fall in the range of $150 to $300. More expensive vehicles will usually require more expensive parts so an OEM alternator for a newer Mercedes or Audi can easily set you back close to $1,000.
What can I use to lubricate my alternator?
Liquid Bearings is the 100%-synthetic lubricant that consistently outperforms all others. Petroleum oils and lubricant sprays leave sticky deposits when they evaporate over time.
Why is my new alternator squealing?
The most typical source of this screeching noise is a broken alternator belt. It’s much worse if the alternator belt squeals after being replaced. Make an appointment with a vehicle technician by searching online for a car service in Reading to completely diagnose the problem and perform the required repairs.
Why is my alternator making a whining noise?
If the alternator is still functioning and charging the battery, correctly then no. However, the whining noise is likely an alternator bearing on the way out, and may soon fail, possibly destroying the alternator.
You should only drive 25 miles or around 30 minutes with a bad alternator if you have a fully charged and properly working battery. If your battery is low, you may need to be towed.
Why is there a whining noise when I accelerate?
If your vehicle makes a whining noise when you are accelerating, a transmission problem is most likely at fault. Whining when accelerating due to transmission problems can be caused by worn-out gears or low transmission fluid due to a leak.
What does a faulty alternator sound like?
If you ever hear growling or whining noises coming from under the hood, you could have alternator problems, which should be checked out by a professional ASAP. This growling or whining sound happens when the belt that turns the alternator’s pulley becomes misaligned or rubs against the side of the pulley.
How do you know your alternator is going bad?
Signs of a Bad Alternator
Some of the things to look for are no-starting and trouble starting, dimming lights and problems with stereo system output. If your car starts but stalls when you’re underway, your battery is probably not being recharged due to a faulty alternator.
How do you check an alternator with a screwdriver?
Can a blown fuse cause alternator problems?
Dead Battery
As was mentioned earlier, the alternator charges the battery while supplying the rest of the car with electricity. If the alternator’s fuse or fusible link is blown, the alternator will not be able to charge the battery.