Published on: December 3, 2022
Written by Jonas Frank / Fact-checked by Nova Scarlett
If you’ve noticed that your car’s battery isn’t holding a charge like it used to, it may be time to replace the alternator. But, before you do, there are a few other things you should check and possibly replace as well. Here’s a look at what else should be replaced when replacing an alternator.
If you’re replacing your car’s alternator, there are a few other parts you should check while you’re at it. The drive belt, serpentine belt, and battery are all integral to the alternator’s function, so it’s a good idea to inspect and possibly replace these parts as well.
The drive belt is what actually turns the alternator’s pulley, which in turn generates electricity.
Over time, the drive belt can loosen or break, which will prevent the alternator from working properly. If you notice any cracks or fraying on the drive belt, it’s probably time to replace it.
The serpentine belt is also connected to the alternator and helps to keep all of the engine’s accessories running smoothly.
Like the drive belt, it can loosen over time and eventually break. Inspecting and potentially replacing the serpentine belt is a good idea when changing out the alternator.
Finally, even though it isn’t directly connected to the alternator, your car’s battery plays an important role in keeping everything running smoothly.
A weak or dead battery can cause all sorts of electrical problems, so if yours is on its last legs then now might be a good time to replace it too.
What Do I Need to Know Before Replacing an Alternator?
Assuming you have some basic car knowledge and know how to change a tire, then you can probably replace an alternator. Replacing an alternator is not too difficult of a task, but there are a few things you should know before attempting it. The most important thing to know is what kind of alternator your car has.
There are two main types of alternators- external and internal regulated. Most newer cars have an internally regulated alternator, so if your car was made in the last 20 years or so, it likely has this type. To check, simply look at the back of the Alternator- if there are only two wires connected to it, then it is internally regulated and does not need an external regulator.
If there are three or more wires connected, then it is externally regulated and does need an external regulator. Another thing to be aware of is that the voltage output of the Alternator will increase as the engine speed increases. This means that if your engine is idling, the Alternator will output a lower voltage than if your engine was running at higher speeds.
This is why it is important to rev up your engine when testing the Alternator- you want to make sure it is outputting enough power even at high speeds. Finally, when replacing the Alternator, be sure to disconnect the battery first! This will prevent any electrical shocks or damage to your car’s electronics while you are working on the Alternator itself.
Should I Replace the Belt When I Replace the Alternator?
No, you do not need to replace the belt when you replace the alternator. The belt is only used to keep the alternator in place and is not necessary for its function.
Do You Need to Disconnect the Battery When Replacing the Alternator?
If your car has an external regulator, you will need to disconnect the battery before replacing the alternator. If your car has an internal regulator, you will not need to disconnect the battery.
What Should You Follow When Removing And Refitting the Alternator Assembly?
Assuming you are talking about a car alternator:
First, disconnect the negative battery cable.
Second, remove the drive belt by loosening the adjusting bolt and pivot bolt.
Third, remove the electrical connections from the alternator- including the large output post and voltage regulator wire harness connection.
Fourth, remove the alternator mounting bolts and then carefully remove the alternator.
Fifth, reverse these steps to reinstall your new or rebuilt alternator.
What to Do After Installing a New Alternator
If your car has been having trouble starting or stalling, or the battery light has been coming on, it may be time to replace the alternator. Once you’ve installed a new alternator, there are a few things you should do to ensure it is working properly. First, check all of the connections to make sure they are tight.
The last thing you want is for your alternator to come loose while you’re driving! Next, start the engine and let it idle for a few minutes. If everything sounds normal and the battery light isn’t coming on, you’re good to go!
If you notice any strange noises or the battery light comes on, pull over and shut off the engine immediately. There may be something wrong with the alternator or one of the connections. Once you’ve determined what the problem is, make the necessary repairs and then continue on your way!
Do You Have to Replace the Battery When Replacing the Alternator?
No, you don’t have to replace your battery when you replace your alternator. However, if your battery is more than three years old, it’s a good idea to get it tested to see if it needs replacing. A weak or failing battery can cause problems with your car’s electrical system, which can in turn cause problems with the alternator.
So, if you’re having alternator troubles and your battery is on the older side, it’s worth getting it checked out.
Who Can Replace an Alternator?
If your car’s alternator is going bad, you may be wondering who can replace it. The answer may surprise you – just about anyone with basic automotive knowledge and a few tools can replace an alternator. Of course, if you’re not comfortable working on your car, you can always take it to a mechanic or auto shop.
But if you’re handy and want to save some money, replacing the alternator yourself is definitely doable. Here’s what you’ll need to do:
1. Disconnect the Battery
This is important – if you don’t disconnect the battery, you could short out the electrical system when removing the old alternator.
2. Remove the Old Alternator
There are usually two or three bolts holding it in place; once they’re removed, the old alternator should come right out.
3. Install the New Alternator
Just reverse the process of removing the old one – bolt it in place, reconnect the battery, and voila! You’re done.
Tools Needed to Change Alternator
If your alternator is going bad, you may be wondering what tools you need to change it. The good news is that you probably won’t need many tools – just a few basic hand tools. Here’s what you’ll need to change your alternator:
– A ratchet and socket set
– A wrench (socket or open-end)
– A screwdriver
– An adjustable wrench (optional)
First, disconnect the negative terminal of your battery. This will help prevent any electrical shorts while you’re working on the alternator.
Next, using your ratchet and socket set, remove the bolts that hold the alternator in place. There are usually two or three bolts holding it down – one at the top, and one or two at the bottom. Once those are removed, the alternator should come loose from its mountings.
Now, disconnect the wiring harness from the back of the alternator. There are usually a couple of small wire connectors – just squeeze them together and pull them off. With the wiring disconnected, you can now remove the old alternator completely from your vehicle.
To install the new alternator, simply reverse these steps – bolt it back into place, reconnect the wiring harness, and then reattach the negative battery terminal. Start up your vehicle and check to make sure everything is working properly before driving off!
Cheapest Place to Get Alternator Replaced
If your alternator is going bad, you’re probably wondering where to get it replaced. After all, you don’t want to spend more than you have to on the repair. Fortunately, there are a few places you can check out for a cheap alternator replacement.
Here are a few of our favorites:
1. AutoZone
AutoZone offers a wide variety of auto parts and accessories, making it a great place to shop for an alternator replacement. They also offer free battery testing and installation services with purchase, so you can save even more money on the repair.
2. Advance Auto Parts
Advance Auto Parts is another great option for an alternator replacement. They offer competitive prices on quality parts, and they also have a number of deals and specials that can help you save even more money on the repair.
3. Amazon
Believe it or not, Amazon is actually a great place to buy an alternator replacement.
They have a wide selection of parts available at very competitive prices, and they often offer free shipping on orders over $25 (which can definitely help offset the cost of the repair).
How Long Does It Take to Replace an Alternator?
An alternator is a vital part of your car’s electrical system, and it helps to keep the battery charged. If your alternator fails, your car will not run. So, how long does it take to replace an alternator?
The average time it takes to replace an alternator is about two hours. However, this can vary depending on the make and model of your car. In some cases, it may take longer if you need to remove other parts in order to access the alternator.
If you’re planning on replacing your own alternator, be sure to have all the necessary tools and parts before starting the job. It’s also important to read through your car’s service manual so that you know exactly what you’re doing. Replacing an alternator is not a difficult task, but it’s always best to be prepared before starting any type of repair on your car.
MIDAS Alternator Replacement Cost
If your car is starting to have electrical problems, it may be time to replace the alternator. The MIDAS alternator replacement cost can vary depending on the make and model of your vehicle, but it is usually around $400-$500. If you have a warranty, your car insurance may cover part of the cost.
Alternator Replacement
If your car won’t start, the battery may be dead. But if the battery is fine and the engine still won’t turn over, it could be an issue with the alternator. The alternator is what charges the battery while the engine is running, so if it’s not working properly, the battery will eventually run out of juice.
That’s why it’s important to know how to replace an alternator. The first step is to disconnect the negative terminal of your battery. This will prevent any electrical shorts when you’re working on the car.
Next, locate the Alternator Belt Tensioner Pulley and loosen the tension on the belt by rotating it counterclockwise. Once the tension is off, remove the drive belt from both pulleys. Now you can access the bolts that hold the alternator in place.
There are typically two bolts – one at the top and one at the bottom – holding it in. Remove these bolts and carefully pull out the old alternator (it may be attached to wiring harnesses so take care not to damage these). To install your new alternator, simply reverse these steps!
Place the new alternator in position (again being careful not to damage any wiring harnesses), then bolt it into place using those same two bolts. Replace your drive belt by routing it around both pulleys, then rotate that Alternator Belt Tensioner Pulley clockwise until there’s enough tension on the belt again. Reconnect your negative battery terminal and you’re all set!
Last Point
If your car’s alternator is going bad, there are a few other parts you should replace at the same time. The first is the drive belt. The alternator pulley puts a lot of strain on the drive belt, so it’s likely that the belt will need to be replaced as well.
You should also replace the battery. Even if the battery isn’t bad, it’s a good idea to replace it since it will have to work harder when the alternator is going bad. Finally, you should have your car’s charging system checked by a mechanic to make sure everything is working correctly.
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