How Long Does It Take To Change An Alternator?

We are happy to have you here! The length of time it takes to change an alternator can vary, typically ranging from one to two hours or even a full day depending on the specific circumstances. Though there are various reasons why an alternator may fail, including poor-quality parts, and adverse conditions. Issues with the car’s electrical system or electronics, and excessive battery consumption. So, driving a car with a dead alternator can be a frustrating experience. Keep reading to learn more about how to deal with this common issue.

How Long Does It Take to Change an Alternator

Car maintenance can be a hassle, but it is necessary to keep your vehicle running smoothly. One component that may need replacement is the alternator. In this article, we will discuss what an alternator is, when to replace the battery when replacing the alternator, how to replace an alternator, how long alternators last, and answer frequently asked questions.

What is an alternator?

The alternator is a crucial component of a vehicle’s electrical system. The alternator converts mechanical energy from the engine’s crankshaft into electrical energy, which powers the car’s electrical components. It produces an alternating current (AC) that the car’s battery then converts into a direct current (DC). So the alternator powers the car’s battery and charging system, ensuring that it remains charged and ready for use.

When do you have to replace the battery when replacing the alternator?

If your alternator needs to replace, it is essential to check the condition of your car’s battery. In most cases, if the alternator has failed, it means that it has been working overtime to keep the battery charged, which can cause the battery to wear out prematurely. If your car’s battery is more than three years old, we recommend replacing it when replacing the alternator.

How to Replace an Alternator?

Replacing an alternator is a straightforward process that can do with basic tools. Here are the steps to follow:

Step 1: Disconnect the Battery

Before starting any work, it is crucial to disconnect the battery. This is to prevent any electrical shock or damage to the electrical system.

Step 2: Leave the wires off

Next, remove the electrical connections from the alternator. These connections may include the output wire, ground wire, and any other wires that may be connected to the alternator.

Step 3: Remove Pulley’s belt

After disconnecting the wires, remove the belt that drives the alternator. This belt may be tensioned by a tensioner pulley, which will need to be loosened to remove the belt.

Step 4: After the belt’s separation, remove the bolts

Remove the bolts that secure the alternator to the engine block or bracket. These bolts may be difficult to reach, so it is important to have the correct tools.

Step 5: Take off the old alternator

After removing the bolts, carefully remove the old alternator from the engine block or bracket.

Step 6: It’s time to install the new alternator

Install the new alternator by reversing the steps used to remove the old alternator. Be sure to torque the bolts to the correct specifications, and tighten the belt to the correct tension.

How long do alternators last?

Alternators are designed to last for a long time, but they can still fail due to age, wear, and tear, or other factors. On average, alternators last for 7-10 years, but this can vary depending on usage, driving conditions, and the quality of the alternator.

Frequently Asked Questions

Q: How do I know if my alternator is failing?
A: Some signs of a failing alternator include dimming or flickering headlights, a dead battery, a warning light on the dashboard, and strange noises coming from the engine.

Q: How much does it cost to replace an alternator?
A: The cost of replacing an alternator can vary depending on the make and model of the car and the quality of the alternator. On average, it can cost anywhere from $300 to $800.

Q: Can I replace the alternator myself?
A: Yes, replacing an alternator can be done by a DIYer with


If you are wondering how long it takes to change an alternator, we have the answer for you! Additionally, we have compiled some commonly asked questions about alternators and provided easy-to-understand answers. The length of the installation process, the time required, and accessibility may vary depending on the make and model of your vehicle. Typically, alternator replacement takes about two hours. Save money on an alternator replacement by doing it yourself at home.

Even if you are new to car maintenance, don’t worry! Keep a set of Craftsman Wrenches on hand to help you through the alternator replacement process, and don’t forget to order any necessary replacement parts.

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