Repairing Guides

how long does it take to repair an alternator

by Allie Kessler PhD Published 3 years ago Updated 2 years ago
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about two hours

Can You give Me the labor time to replace the alternator?

They generate heat as they work and they are usually put in a position where they have good airflow. This leads to a common labor time for replacement of about an hour , though, there are a few vehicles where significantly more time is needed. Most often, labor on an alternator replacement is billed at book time.

How do you tell if the alternator needs replacing?

The Warning Signs of a Failing Alternator

  • Indicator Lights. Most modern cars have a dashboard warning light to alert you to a problem with your alternator. ...
  • Headlight Trouble. Your alternator provides the power to your headlights. ...
  • Other Electrical Problems. ...
  • Smells. ...
  • Dead Battery. ...
  • Stalling or Difficulty Starting. ...
  • Noises. ...

How long does it take to get a new alternator?

With the alternator free from its mounts and able to wiggle a bit i used a 1/4 ratchet with a long extension to remove the bolt. The make and model of your vehicle will determine the exact time it takes to replace the alternator, but usually, one to two hours is sufficient.

How hard is it to change an alternator?

You’ll need a number of different tools in order to install your new alternator, including:

  • New car alternator (of course!)
  • Belt tensioner
  • Basic hand tools
  • Voltmeter
  • Replacement serpentine belt
  • Rags
  • Gloves

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How long does it take to fix a alternator at a mechanic?

about two hoursReplacing an alternator will take a professional about two hours. However, that doesn't mean your car will only be at the shop for two hours—there may be a wait before a mechanic can address your ride. Plus, if the shop needs to get parts delivered, it will take even longer.

How much does fixing the alternator cost?

between $500 and $1,000When 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.

Are alternators easy to repair?

Replacing an alternator can cost you several hundred bucks at the local repair shop, but it's one of the simplest repairs you can do at home. With a few tools and about an hour you can swap it out yourself -- and keep your dough in your pocket where it belongs.

How long does a repaired alternator last?

When people have their car alternator replaced, the expectation is that the repair will last at least as long as the expected life of the new alternator, four to five years or anywhere from 50,000 to 100,000 miles.

Is it worth replacing alternator?

It's usually a better idea to replace the alternator entirely if it is malfunctioning. While new ones can be spendy, they are usually a better choice than remanufactured or rebuilt options. Those probably won't last as long as a new one since the mechanical parts have miles on them already.

What causes an alternator to fail?

Alternators have a number of moving parts, so as they get dirty and are subjected to extreme temperatures, those internal components can wear out, causing the alternator to go bad. One of the most common problems you're likely to experience with an alternator is a failure in the bearings.

Do you have to replace battery when replacing alternator?

Your battery should be one of the first things on your checklist after installing a new car alternator. Any installation guide will say that you need to disconnect the battery before installing the new alternator. So, at the very least, you need to make sure that you reconnect it.

What else should be replaced when replacing alternator?

When replacing and alternator, other upgrades are worth doing too. Go ahead and change the serpentine belt, tensioner and idler roller when replacing an alternator on your car or truck.

What can damage an alternator?

Driving a vehicle through water that is deep enough to splash or flood the alternator can damage the alternator shaft bearings and possibly the brushes and electronics inside the unit as well. Water can also cause corrosion that over time will damage the wiring and bearings inside the alternator.

Can an alternator fail suddenly?

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.

Does alternator drain battery?

Contrary to its purpose, an alternator can drain a battery. It's rare, but it's possible. A draw on the battery only occurs if there's a problem with either a component in the alternator itself or connections to it.

Can you drive a car with a broken alternator?

Technically yes. If you have a bad alternator or you're just starting to experience car alternator problems, you can still drive it; however, it's best not to. If your alternator has stopped working entirely, you have minimal time before your car stalls and won't restart since you have a dead battery.

How do I know if my alternator is bad?

7 Signs of a Failing AlternatorDim 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.

Is it safe to drive with a failing alternator?

Driving around with a bad alternator isn't a smart idea; as damaged or broken alternators can cause a wide range of problems. They can interfere with your car's electrical features, make it harder to start the engine, and even cause the battery to drain entirely, leaving you with an utterly unresponsive vehicle.

What happens when your alternator goes out?

If a faulty alternator fails to keep your battery consistently charged, the fuel injectors may not fire, causing your engine to stall. A dying alternator can lead to a wide range of other electrical issues. Generally speaking, such issues manifest as an inability to perform at normal power.

How Long Does It Take to Change an Alternator?

A seasoned mechanic can repair or change your alternator in around two hours based on the make and model. However, most repair shops may charge for...

How Long Does an Alternator Last?

The alternators have a longer lifespan than car batteries. On average, the alternator lasts between 4 to 7 years. However, it depends on how freque...

How Much Does It Cost to Replace an Alternator?

The cost depends upon your car's model and make. The service cost may range anything between $100 to $400. The labor cost would be around $120 to $...

What do you know about my business?

Cannon Auto Repair Shop is the leading NAPA AutoCare Center serving Cannon Falls, MN. Get expert ASE Certified automotive repairs, factory schedule...

What are your hours?

Mo 08:00-17:00; Tu 08:00-17:00; We 08:00-17:00; Th 08:00-17:00; Fr 08:00-17:00

what is your business address?

1709 Minnesota 20, Cannon Falls, MN 55009, US

what payments do you accept?

Cash, Check, All Major Credit Cards, All Major Fleet Cards

What is the phone number to a business?

(507) 263-2120

How much does a belt tensioner cost?

The belt tensioner will run about $50-$100. The fact is that this job won’t cost you as much in labor as it will for the alternator. The cost of taking it to a mechanic depends on the make and model. It’ll run around $300 to $400 for an older Ford truck.

What happens if your car battery stays the same?

If it stays the same or spikes, then you’ve got a problem, and you’ll need to replace it. Likewise, if the battery has less than a 50 percent charge, you’ll need to get it up to 100 percent before you start the repair. If you have a newer vehicle, you should also use a memory saver to retain your car’s presets.

Do you have to reset your clock with older cars?

If you have a newer vehicle, you should also use a memory saver to retain your car’s presets. You only have to reset your clock with older models. Do yourself a favor and check the belt before you start wrenching on your car. Older models will have V-belt and newer ones, a serpentine belt.

Can you take off an alternator when it's loose?

Tension is the operative word here. Don’t let it snap back and hurt you or damage any other parts under the hood. Once it’s loose, you can take it off and continue with the repair. Once you’ve completed these steps, you can slip off the old alternator from its housing.

How long does it take to replace an alternator?

The make and model of your vehicle will determine the exact time it takes to replace the alternator, but usually, one to two hours is sufficient.

What happens if the alternator is replaced right away?

But, if the alternator is replaced right away, the charge can be restored to the battery. So, if the dash battery light comes on and the headlights are dimming, get a charging system test to make sure whether the problem is the alternator or the battery.

How to tell if alternator is bad?

Signs of a bad alternator include: • Car radio or other auto electrical components to work intermittently, or cause a squealing noise in the engine. • Fluid leaks in the alternator or a tight belt can also cause damage to the alternator bearings, causing premature wearing.

What factors affect the time needed to replace an alternator?

Other factors that can affect the time needed to replace the alternator include the accessibility of the alternator fora particular vehicle and back ordered or special order parts.

What is alternator replacement?

Alternator Replacement and Diagnosis. First of all, please let us describe what an alternator is. The alternator is a vital part of a vehicle's electric system. The battery starts the car, but it's the alternator that keeps it running. When the engine is running, the alternator supplies extra power to the electrical system and charges the battery.

Why does my alternator fail?

Several factors can affect how long an alternator lasts, including the quality of the part, conditions in which the car is driven and how many electronics are being used inside the car.

How long does it take to replace an alternator?

Replacing an alternator can take up to about two hours or so at a mechanic ...

How does an alternator work?

Your battery and your alternator work together to ensure that your vehicle is able to get started and then keep running once it has started. While it's gasoline that fuels the combustion reaction it is electrical power that makes everything else in your vehicle run so your alternator is incredibly important to the life of your vehicle. Most drivers will initially blame a battery for any electrical mistakes or problems in their vehicle, but the alternator is usually the source of problems if anything goes wrong while your car is running.

What happens if your alternator fails?

Failed Electronics. Your alternator provides the power for all your electronic components while the vehicle is running. If things are starting to fail on you and not work properly in the cabin of your car there’s a good chance your alternator is not working.

Can an alternator die on you?

Of course, nothing is guaranteed and depending on any number of factors your alternator could end up dying on you sooner rather than later. If that's the case, you're going to need to have your alternator replaced because your car can’t function for very long with a faulty alternator.

Can you touch an alternator?

You never want to touch the alternator if your battery is still connected. Make sure you disconnect the negative battery cable before you get started. Step 2: Now you can remove the power cables from the alternator. The main power cable will probably be a larger cable that connects the alternator to the battery.

Does every alternator have a pulley?

That means you have to relieve the tension on the serpentine belt with the auto tensioner if it has one. Unfortunately, not every alternator is set up the same way and not every vehicle has a tensioner pulley.

What is an alternator?

Your car's alternator generates most of the electricity in your vehicle, powering everything from the radio to taillights. Here’s how it works:

Symptoms of a bad alternator

A broken alternator — not to be confused with a failing alternator belt (also called the serpentine belt) — can be hard to diagnose because many of the symptoms of a bad one are the same as the symptoms of a faulty battery, and both can be debilitating enough that diagnostic tests are impossible to run.

How much does it cost to repair an alternator?

Repairing your vehicle's alternator generally isn’t a viable option compared to replacing one. There are a few reasons for this, but the main one is that repairing something can cost a lot more in terms of labor than replacing it.

How much does alternator replacement cost?

We gathered estimates for replacing an alternator in three sample vehicles in Austin, Texas, to give you examples of what this service might cost. The costs for replacing an alternator in these sample cars range from roughly $530 to $2,660.

Can I drive with a bad alternator?

You can potentially drive a short distance with a faulty alternator, but we don’t recommend it. Because this component powers so many different parts of your vehicle, driving with a bad alternator can impact various functions. A faulty alternator often leads to a dead battery, but if left unfixed, it could ruin your car battery too.

Bottom line

Replacing your car's alternator isn’t cheap, but it’s also not the worst car problem you can have. If you’re having problems with your car’s charging system, take it to a mechanic, get it diagnosed, ask for an itemized quote and make sure you’re not being overcharged.

How long do alternators last?

In general, you can expect alternators to last about 6-10 years, or about 80,000-150,000 miles.

How to test alternator?

First, you’ll want to test your battery, then inspect the serpentine belt, inspect the alternator pulley, and inspect the serpentine belt tensioner. If all of those are clear, then check the alternator by testing the battery voltage using a multimeter.

How does an alternator work?

The engine’s crankshaft turns the serpentine belt, which turns a pulley on the alternator. The alternator then uses electromagnetic induction (magnets spinning inside a ring of copper wiring) to produce alternating current (AC) voltage. The AC voltage then goes through diodes and becomes direct current ...

Why is an alternator important?

Although equally important, the alternator is responsible for keeping the battery in proper working condition, and malfunctions from either can create havoc for the other. Today we’re going to explore common alternator faults and how long you can expect alternators to last.

What is the purpose of an alternator?

The alternator is the part in your car’s charging system that is responsible for keeping your car’s battery charged. The alternator is essentially a generator that turns mechanical energy into electrical energy that goes on to power things in your vehicle.

Is an alternator a lifetime part?

Alternators are not lifetime parts. The Drive and its partners may earn a commission if you purchase a product through one of our links. Read more. Owning a car might be the biggest, and worst, waiting game on the planet. Every single day that you step into the driver’s seat and wonder, “What might go wrong?”.

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