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Weird humming noise when starting up car and temperature increasing

  

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Topic starter

 

Hi Scotty & everyone,
I am having this issue when starting up my car.
Raise up the volume to hear the strange so heund.

When I start the car, temperature needle is on C°. No strange sound.

After a few mins, when the needle start moving up (warming up), I hear this strange noise.

When temperature has increased and stabilised to a correct level, there is no more sound.

When I started up the car, I recorded an audio and then I recorded a video.

It starts at 00:58 on the audio recording until 1:41.

And it continues in the video which is 2:10 mins.

Therefore, the sound goes on for about 2:50 / 3 mins.

2015 Perodua Myvi SE

Manual transmission Gasoline 4-cycle

4-cylinder in line DOHC 3SZ-VE

Timing chain inside block

Mileage 71,709 km

I wonder if it is the water pump or a leakage somewhere which causes this sound or something else? I don't know how to upload the video and audio recordings.


Make a YouTube video & post the link here.


Please find hereafter my OneDrive link to the two recordings (audio and video) :
https://1drv.ms/f/s!ArPYTRxTMpKXjySwM-vARppirBVQ


2 Answers
1

Start by checking if it’s one of the pulleys -

https://youtu.be/UqLXwN2GNeU


Days are passing by and I still cannot find what is causing this noise.


Did you take off the drive belt & check if the noise remains or goes away?


0
Topic starter

Please find hereafter my OneDrive link to the audio and video recordings

https://1drv.ms/f/s!ArPYTRxTMpKXjySwM-vARppirBVQ

 


If you rev up the engine, does the noise increase/reduce/stay the same?


No the noise stops by itself. If you listen to the audio recording firstly and then the video, you'll see that it starts and ends by itself.

When I start up the car for the first time at noon (12:00 o'clock), it does not make this noise.

But when I start up the car in the morning, it starts normally.
From the audio recording, after 00:50 seconds idling, we can hear something which starts working and the noise begins and goes on for about 3 mins. This is driving me crazy. Please help.


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