There are a few issues that could make the alternator go bad, such as jump-starting the car the wrong way or installing an accessory that overloads it. Leaking fluid in the alternator or a tight belt can also cause damage to the alternator bearings, causing premature wearing.
Why would a brand new alternator go bad?
Alternators put out alternating current , and the battery needs direct current to charge, so there is a voltage rectifier that converts it, and it can suddenly go bad, too. ... Dust and dirt can get into the alternator, and over time cause shorts or wear on the brushes.
What can ruin a new alternator?
- An overtight alternator belt will very quickly ruin the alternator bearings. Make sure they check your drive belt tensioner during regular servicing.
- Dirt, dust, and oil in the electrical windings can prevent the alternator from operating at optimum levels.
How often is a new alternator bad?
In general, you can expect alternators to last about 6-10 years , or about 80,000-150,000 miles.
What are the signs of a failing alternator?
- Dim or Overly Bright Lights. ...
- Dead Battery. ...
- Slow or Malfunctioning Accessories. ...
- Trouble Starting or Frequent Stalling. ...
- Growling or Whining Noises. ...
- Smell of Burning Rubber or Wires. ...
- Battery Warning Light on Dash.
Do alternators fail suddenly?
The alternator is a key component in running the electrical systems in your car. ... When your alternator begins to fail it can cause a variety of different electrical problems in your car, and eventually cause a breakdown. Alternators can go bad suddenly , or slowly over time.
What kills the alternator?
Running in full charge mode continuously can kill an alternator, so trying to have your new alternator try and charge your dead battery can result in immediate alternator failure.
Can you jump a car with a bad alternator?
While jumpstarting a vehicle with a bad alternator may technically be possible , do not leave jumper cables connected between vehicles longer than necessary as it can result in damage to sensitive electronics.
What is the lifespan of an alternator?
“Its primary job is to keep the electrical system up and running in place of the battery. The battery's job is to start the car, and the alternator keeps it running.” Gunning says an alternator typically lasts about seven years — or about 100,000 to 150,000 miles, says Waits.
How much does it cost to replace alternator?
When your car starts having electrical problems, it's a sign you need an alternator replacement. Considering the price of a new alternator as well as labor, you should expect to spend anywhere between $500 and $1,000 to get a new one for your vehicle.
What kind of noise does a bad alternator make?
Whining and Grinding Sounds
If your alternator is failing, you could hear a few abnormal noises. If you hear a small rattling or grinding sound when your engine is running, this could be caused by a loose bearing in your alternator.
Is it worth replacing an alternator?
While alternators can last more than 100,000 miles, their internal parts spin when the engine is operating, and wear out over time. Chances are at some point in your car's life cycle, that alternator will have to be replaced. Don't run out and buy the cheapest used or rebuilt alternator you find online.
What happens when an alternator goes out while driving?
If your alternator goes out – your car isn't going anywhere fast. Because your alternator charges your car's battery , without it, you won't be able to start your car, which means you'll need a tow to the mechanic. When you have a dead alternator, your battery will also die during normal use. ... A dead battery again.
How do you tell if it's your battery or alternator?
If your engine won't turn over or takes far longer than usual, it's time to grab the jumper cables and attempt a jump-start. If your engine starts and stays running but won't start again later, it's likely a battery problem. If your vehicle immediately stalls, it's probably a bad alternator.
How do I know if my battery is bad or my 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 long will a car run without alternator?
For the unfortunate souls who realize that this vital part of the vehicle is failing, how long will a car run without an alternator and what can you do to elongate the vehicle's ability to function? Without this essential component, your car will only function for up to two hours and as little as five minutes .
