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Old 01-06-2021, 03:50 AM   #1
BuntaBente
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Default Loud buzzing noise for 15 min after turning car on

Hi all, I have a 2013 wrx that is making a very loud buzzing/humming noise that lasts for about 15 min upon starting the car. Thought it was a one time thing but I've started twice since then and it makes the same noise. Not trying to drive it until I take it to my mechanic but I was wondering if this happened to anyone else and/or if anyone has an idea of what this issue could be.

Appreciate the help!
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Old 01-06-2021, 09:53 AM   #2
Mulder
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Where in the car is it coming from? If it's from the rear it may be the fuel pump. Turn the key to "run" without starting, do you still hear it? Normally the fuel pump should prime for a few seconds and turn off when you turn the key on but don't start, if that sound is the same buzzing you've found your problem.
If it's not coming from the rear then it's something else.
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Old 01-06-2021, 05:05 PM   #3
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What he said ^^^. You need to provide more information. Have a smartphone? Record it, upload the video to youtube and paste the link here. Could be bearing on the idler pulley, could be a bad steering pump, could be a bearing on the alternator pulley, could be a fuel pump that's about to go out.
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Old 01-06-2021, 05:39 PM   #4
BuntaBente
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The noise is coming directly from the engine bay, it is very clearly coming from there and its somewhere in the middle of the engine bay.
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Old 01-06-2021, 05:40 PM   #5
BuntaBente
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I'll record a video and get it on youtube to post here so you can get a better idea, thanks!
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Old 01-06-2021, 05:41 PM   #6
BuntaBente
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Btw the noise goes away after 15 min and the car drives fine, if that means anything. (tried driving it for 10/15 min earlier to see if i felt anything different while driving)
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Old 01-06-2021, 06:46 PM   #7
BuntaBente
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Quote:
Originally Posted by Scooby-Doode View Post
What he said ^^^. You need to provide more information. Have a smartphone? Record it, upload the video to youtube and paste the link here. Could be bearing on the idler pulley, could be a bad steering pump, could be a bearing on the alternator pulley, could be a fuel pump that's about to go out.
here is the video:
shot it on an iphone didnt realize the quality would get distorted so much but the noise is clear.
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Old 01-06-2021, 06:48 PM   #8
BuntaBente
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Quote:
Originally Posted by Mulder View Post
Where in the car is it coming from? If it's from the rear it may be the fuel pump. Turn the key to "run" without starting, do you still hear it? Normally the fuel pump should prime for a few seconds and turn off when you turn the key on but don't start, if that sound is the same buzzing you've found your problem.
If it's not coming from the rear then it's something else.
another video where the buzzing got extremely loud:
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Old 01-06-2021, 08:55 PM   #9
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Quote:
Originally Posted by BuntaBente View Post
another video where the buzzing got extremely loud: January 6, 2021 - YouTube

Car is stick or auto?

Any electrical gremlins? Issues starting the car? Car stalling? I am no expert, it is a heavy metallic sound. Well duh the entire motor is metal .

Do you hear this whine when you turn the steering wheel left/right.

Don't know how hand you are but can you try to take off the belt? Spin the idler pulley, spin the alternator.

Here is a reference on the topic.

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Old 01-06-2021, 09:23 PM   #10
Gucciflipflops
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Let your car cool down and then remove your v belt. Turn the car over and run for 5 - 10 seconds. If the sound is gone that narrows it down for you. If not repeat with accessories belt. Do not do this with a warm car.

My money is on that alternator.
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Old 01-06-2021, 10:04 PM   #11
BuntaBente
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Quote:
Originally Posted by Scooby-Doode View Post
Car is stick or auto?

Any electrical gremlins? Issues starting the car? Car stalling? I am no expert, it is a heavy metallic sound. Well duh the entire motor is metal .

Do you hear this whine when you turn the steering wheel left/right.

Don't know how hand you are but can you try to take off the belt? Spin the idler pulley, spin the alternator.

Here is a reference on the topic.

Troubleshooting Grinding, whining, Metallic Engine Noise - YouTube
it is a stick shift 5 speed, havent had any issues starting the car and i tried the wheel thing but nothing changed. Im unfortunately not too handy with cars and i dont really have the space where i live (downtown city) so I'd have to take it to my mechanic I was just wondering if someone else had the same issue.

I'll take a look at that video though thanks for the help!
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Old 01-06-2021, 11:18 PM   #12
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Quote:
Originally Posted by BuntaBente View Post
it is a stick shift 5 speed, havent had any issues starting the car and i tried the wheel thing but nothing changed. Im unfortunately not too handy with cars and i dont really have the space where i live (downtown city) so I'd have to take it to my mechanic I was just wondering if someone else had the same issue.

I'll take a look at that video though thanks for the help!
Caution, do the following at your own RISK!!!, and if you know what an alternator is. I bear no responsibility if you get injured.

Start the car. Let it warm up and idle to normal. Grab a wood stick, say about 3 or 4 feet long. Stick it on top of the alternator, avoid the holes of the stator motor. Stick the other of wooden stick near your ear. Close your other ear with your finger. Don't take your eyes off the stick, lots of moving parts, you don't want to mess around with a live motor.

If you hear humming it's not the alternator. If you hear the heavy metallic noise then you know it's the alternator.

When in doubt leave it to the experts.

Good luck and report back either way.
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Old 01-07-2021, 09:20 PM   #13
BuntaBente
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Quote:
Originally Posted by Scooby-Doode View Post
Caution, do the following at your own RISK!!!, and if you know what an alternator is. I bear no responsibility if you get injured.

Start the car. Let it warm up and idle to normal. Grab a wood stick, say about 3 or 4 feet long. Stick it on top of the alternator, avoid the holes of the stator motor. Stick the other of wooden stick near your ear. Close your other ear with your finger. Don't take your eyes off the stick, lots of moving parts, you don't want to mess around with a live motor.

If you hear humming it's not the alternator. If you hear the heavy metallic noise then you know it's the alternator.

When in doubt leave it to the experts.

Good luck and report back either way.
I'm unfortunately not handy with cars so I'd have to have a professional do it but i just realized that my power steering fluid is low even though I didn't really feel it when driving. Could that be the issue of the loud noise?
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Old 01-07-2021, 09:28 PM   #14
Scooby-Doode
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Quote:
Originally Posted by BuntaBente View Post
I'm unfortunately not handy with cars so I'd have to have a professional do it but i just realized that my power steering fluid is low even though I didn't really feel it when driving. Could that be the issue of the loud noise?
Yes that is totally possible. Check the manual to see when it should be checked and what type goes in. Also check to make sure you don't have a leak by looking under the car.
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Old 01-07-2021, 11:11 PM   #15
BuntaBente
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Quote:
Originally Posted by Scooby-Doode View Post
Yes that is totally possible. Check the manual to see when it should be checked and what type goes in. Also check to make sure you don't have a leak by looking under the car.
I think my steering rack is leaking, do you know how much it would cost to replace and/or the correct steering rack for a 2013 Impreza WRX Sedan?
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Old 01-14-2021, 12:18 AM   #16
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Quote:
Originally Posted by BuntaBente View Post
I think my steering rack is leaking, do you know how much it would cost to replace and/or the correct steering rack for a 2013 Impreza WRX Sedan?
No idea. Try Rockauto .com or local stealer.
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Old 01-14-2021, 01:45 AM   #17
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If you are not going to fix it yourself just take it to a decent mechanic nearby. Good mechanics are worth the money you pay them. DO NOT take it to a dealership, they are a ripoff every time.
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Old 01-14-2021, 09:08 PM   #18
leray94
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Quote:
Originally Posted by speedyHAM View Post
If you are not going to fix it yourself just take it to a decent mechanic nearby. Good mechanics are worth the money you pay them. DO NOT take it to a dealership, they are a ripoff every time.
This. You said you're not handy wwith cars, so might as well get it in a shop and get a quote/diagnosis ? Then come back and ask if it's an easy fix, maybe you're better than you think
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Old 01-15-2021, 12:44 AM   #19
AliBenn
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Got $6?
Buy one of these

https://www.harborfreight.com/mechan...CABEgItJ_D_BwE

Start poking around and listen

Can appreciate you saying ***8220;not handy with cars***8221;
Got to get lil dirty/do some investigation and report back

This could be a $40 pulley that takes 20mins to change
Or alternator......20mins to change
(Maybe a hour for someones 1st time)

That wood stick thing is same as using that $5 stethoscope
Some mechanics just use a long screw driver, with your ear at one end
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Old 01-19-2021, 09:48 PM   #20
Galarza
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Yeah I have a noise too but I think I rather have your noise. I have a ticking noise sounds like a diesel. ***55357;***56873;
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