How to Fix a Squeaky Alternator Bearing

Alternator Making Noise

The alternator is a very important part of your car. It charges the battery, which powers many devices in your vehicle. If it’s not working properly, though, you may have problems powering up some of these devices. One common problem with alternators is that they squeak when being used. This can be caused by a faulty or worn-out bearing in the alternator housing unit. Sometimes simply greasing this bearing will fix the issue but if not then replacement may be necessary to get rid of this annoying noise coming from your car engine bay.

A squeaking noise coming from your engine is often caused by a failing or worn-out alternator bearing. Replacing the bearing should fix this problem and get rid of the noise for good.

Here are the steps to fix a squeaky alternator bearing:

1. If you suspect your alternator is making noise or it hasn’t been working properly, bring it in to have someone take a look at it for you. It’s possible that this isn’t even the problem but there might be something else wrong with the alternator that could cause damage if not fixed right away. This is especially true if your car seems to be having problems holding a charge or your battery light keeps coming on. Once you have established that the problem is in fact just with the bearing and not something more serious like loose belts or wires, you can get down to work fixing this issue on your own.

2. To begin with, open up your engine bay and look at the alternator. On most cars, this is located on the driver’s side on the front of your engine. It will be covered by a metal or plastic casing that may say “ALTERNATOR” somewhere near it (you may need to get down and look up under the hood). This case should have three different screws you can use to remove it; two in the back and one in the front if you’re lucky. Keep track of these screws since they are often different sizes and/or may not even match your car (it’s always good to keep spare hardware laying around for such problems).

Once all three cases are removed from your alternator, take a close look inside. There should be some sort of electrical current coming from the battery to the alternator, so if there is no juice running through it then you won’t be able to fix this problem. You can check your owner’s manual or do some research online if you are unsure of which wires go where. If you have confirmed that there is electricity going through your alternator at this point but the squeaking persists, then continue on with these steps.

3. Remove the decorative casing around your alternator by undoing all three screws again. Inside will be a metal ring that likely has one screw holding it into place. This may also have another nut connected at the bottom of the case itself which you will need to remove using an adjustable wrench or socket if possible (see “Tools You Will Need” below). Gently remove the metal ring and place it aside while you look inside the alternator.

4. There should be three plastic pieces stacked on top of each other right in the center of your engine bay (with or without wires connected to them). Unplug any cables that might be attached to this piece and take a closer look at what is inside these areas. It’s likely there won’t be many tools available for you to use here so just work with whatever you can find. You will want to use an adjustable wrench or socket set that has wrenches ranging from 7mm to 12 mm, depending on how much space you have inside this area with your alternator. A small ratchet may help as well if there is enough room to maneuver it.

5. Take the alternator apart carefully by unscrewing any screws that may be keeping these plastic pieces safe and sound inside of your car. Try not to unplug any wires unless you know exactly where they need to go back in (this will depend on where your battery and fuse box are located). You don’t want to force anything and risk breaking one of these important parts so be patient and work slowly with whatever tools you have available. If you cannot take off a part using these wrenches, try using pliers instead or even vice grips if you’re desperate.

6. Once all three of the plastic pieces are removed from their places within this piece, into each of them individually as shown in the picture below. Check to see if there is any dirt or other junk on these inner surfaces or even inside of the bearings themselves. Clean out any dust using a toothbrush and clean water, as well as some rubbing alcohol if needed. Make sure you also wipe down all six little holes where the rocks got stuck so they are free from debris as well before putting your alternator back together again.

7. Put each of those plastic pieces back into place within the metal ring and re-tighten any screws and nuts that were holding them in. Plug back in any wires (be very careful not to break them) and then put your three cases back onto your alternator, screwing them securely into place with your original screws (be sure to keep track of which ones are longer and which ones are shorter). Try your car again at this point to see if the squeaking has stopped.

8. If you continue hearing a loud noise coming from your engine bay, don’t give up hope yet! The next step is to check all six of the little holes where those rocks got stuck in (you can also do this before putting your alternator back together). Take that adjustable wrench or socket set with wrenches ranging from 7mm to 12 mm again and use it to take out each bolt individually by turning them counter-clockwise (if they’re not removed already) so you can clean out any dirt inside these holes with repeated applications of rubbing alcohol until it looks as good as new. Then put the bolts back in securely with your fingers before using your wrench or socket set to tighten them up properly, taking special care not to break any of these parts as you do so.

9. If you continue hearing a loud noise coming from your engine bay, don’t give up hope yet! This likely means that there are more rocks stuck inside of some other part of your car which need to be removed. Make sure that all of the squeaking has stopped by trying your car again at this point before proceeding with what is below. Take off your battery’s casing if it hasn’t been already and take out all five or six bolts on top holding it down tightly with an adjustable wrench or socket set (be careful not to break the bolts), depending on where its located in your car. Once you have it out of place, take off any plastic covering to expose the insides.

10. Repeat step 9 with all five or six bolts holding down your fuse box if it’s underneath or next to your battery (you may need a small ratchet for this). Sometimes there are just too many rocks stuck inside of these areas which causes your car not to turn on at all, so taking them apart is definitely worth a shot before anything else. After removing all of these parts, take off any plastic covers that are protecting the inside of either one using your hands and wash them thoroughly with plenty of soap and water until they look brand new again before putting everything back together securely .

11. If you continue hearing a loud noise coming from your engine bay, don’t give up hope yet! This likely means that there is something wrong with one or more of the belts underneath your car and/or within your car’s cabin (depending on where they’re located), which also need to be replaced if damaged severely. Take these off slowly using whatever tools you have available and make sure each part is wiped down before putting them back together again. Make sure all six holes in your alternator are clean before doing so as well (rubbing alcohol should do the trick). It might be necessary to buy new ones for this purpose since it seems like every time we try taking apart our own, we always seem to find even more rocks stuck inside of them.

12. If you still continue hearing a loud noise coming from your engine bay, don’t give up hope yet,  as now the problem is most likely either with your battery, alternator or starter. Take your battery back to the store where you bought it from and ask them for a replacement if it’s dead as a doornail after all of this (be sure they test it first to be sure). As for buying an entirely new alternator or starter, you might want to get a professional opinion before doing so since these are far more expensive if your car still won’t turn on at all.

Best of luck! Please let us know how everything goes by leaving a comment below.

Final Thoughts

This should solve the majority of your problems if you continue hearing a loud noise coming from your engine bay, but many of us who have tried everything above only to find ourselves still stuck in this unfortunate rut are finding it hard to believe. At this point, all we can think is that there must be rocks inside of other parts of our cars which need to be removed as well, so please keep reading to find out what’s next.

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