Vauxhall Astra - Chirping sound when engine warm and idling - Astra

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Wed 31 Mar 2021 13:36
Vauxhall Astra - Chirping sound when engine warm and idling - Astra - Clay_88

Hi There,

I've recently purchased a 2013 Vauxhall Astra.. when the engine warms up and the car idles a chirping sound appears.. when we first heard it, we thought it was the fan belt.. so we changed that.. along with the following:

New Waterpump

New Headgasket

New Thermostat

New front exhaust pipe

New lambda sensor on flexi pipe

New ancillary drive belt

I've noticed that it doesnt matter if aircon or heating is on.. Its just when I am stopped and in gear or not.. clutch in or not..

I did notice that my RPM is below 1 and if I accelorated a bit to get it to 1, the noise disappeared.. but comes back when I remove the acceloration and it idles at its normal (I'd say its about 0.8)..

I've got a video of the sound (hopefully I can add it after this post)..

Does anyone have any clue what this could be?

Car works fine.. just this noise!

Thanks

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Wed 31 Mar 2021 13:39
Vauxhall Astra - Chirping sound when engine warm and idling - Astra - Peter.N.

Alternator?

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Wed 31 Mar 2021 13:43
Vauxhall Astra - Chirping sound when engine warm and idling - Astra - Clay_88

We changed the alternator too and the noise was still there :-/ (so they put the other one back on again.. so not new right now)

This is a video when I just start the car.. no chirping (but some weird ticking sound around the engine) - https://share.icloud.com/photos/0yx5BuHpvfxZyfXFm6TXajNMA

This is a video when its warmed up.. you can hear the chirp.. I tried to move the camera around to get close to the noise.. seems its on the left somewhere (when facing from the front).. - https://share.icloud.com/photos/0emW1Z_5YNxOCoGI0LULlwTFw

This is a video from inside the car (you can hear the noise).. and the RPM thing I mentioned above.. on 1.. it goes then comes back when it goes back down.. - https://share.icloud.com/photos/0HwQcL15d93YCLLM626iOeF-w

Thanks

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Wed 31 Mar 2021 14:54
Vauxhall Astra - Chirping sound when engine warm and idling - Astra - elekie&a/c doctor
Pcv valve in the cam cover box ?
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Thu 1 Apr 2021 09:36
Vauxhall Astra - Chirping sound when engine warm and idling - Astra - Andrew-T

Cambelt tensioner ?

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Thu 1 Apr 2021 18:15
Vauxhall Astra - Chirping sound when engine warm and idling - Astra - _

Chirping sound, Budgie getting hot?

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Mon 30 Sep 2024 23:41
Vauxhall Astra - Chirping sound when engine warm and idling - Astra - A14net Vaux

Hi mate

Did you find a fix for this? I think I have the same noise on my 2011 astra 1.4 gtc.

Cheers

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Tue 1 Oct 2024 07:02
Vauxhall Astra - Chirping sound when engine warm and idling - Astra - mickyh7

Three and a half year old thread?

But you can save £2000 by not using the Parts Cannon!

This is a great story about how not to fix a car.

His mechanic should be jailed!

Edited by mickyh7 on 01/10/2024 at 07:14

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Sun 13 Oct 2024 13:05
Vauxhall Astra - Chirping sound when engine warm and idling - Astra - edlithgow

OP has stopped sharing files, so havnt heard the noise, but the description sounds like aux drive belt. If a new one didn't fix it, could be belt tension, contamination of a non-renewed pulley, or alignment.

On my car I had noises which seemed to be associated with alternator bearing failure

After replacing that, I manually adjusted the belt tension to produce an appropriate alternator voltage output, but I imagine a modern car would probably be tensioned automatically.

It MIGHTbe possible to localise the noise to the belt by wetting it. and seeing If this makes the noise go away.

As well as visually checking for pulley alignment, you can get alignment checking gadetry that uses lasers

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