My Euro has a siren stuck in it.

**BiLL|z0r** · 22-02-2007 08:05 PM

Let me explain.
Randomly through the day my car will make a WHOOO sound for about 1/2 a second which sounds just like the start of a police siren. At first I thought it was the brakes making the noise as I only noticed it whilst stopped, but it's now done it at 100km/hr as well. This time it did it about 2 seconds after I turned the air con on. I don't know if that had anything to do with it or was just a coincidence. Ever since I think it's done it with the air con on after being turned off for some time(10mins+), but I might be only grasping at straws.
It's really random and might not even do it at all for 2-3 days.

Any ideas or should I check into the loony bin now?

**aaronng** · 22-02-2007 08:12 PM

It's probably your accessory belt slipping. The sound should happen when your A/C compressor kicks in.

**Peekay34** · 22-02-2007 08:13 PM

This happened on my old Corolla as well... so you are not loony....

Not sure why it happens I think has something to do with pipes momentarily freezing around the air flow pipes which causes the sound as it only happened when the air con was very cold... Also as aarong suggest's could be youur belt but that is more a high pitched squeal... On my Corolla though was not the belt causing it was advised could be the cold..

**albii** · 22-02-2007 09:15 PM

Originally Posted by BiLL|z0r

Let me explain.
Randomly through the day my car will make a WHOOO sound for about 1/2 a second which sounds just like the start of a police siren. At first I thought it was the brakes making the noise as I only noticed it whilst stopped, but it's now done it at 100km/hr as well. This time it did it about 2 seconds after I turned the air con on. I don't know if that had anything to do with it or was just a coincidence. Ever since I think it's done it with the air con on after being turned off for some time(10mins+), but I might be only grasping at straws.
It's really random and might not even do it at all for 2-3 days.

Any ideas or should I check into the loony bin now?

got the same thing too...must get it looked at next service.

**Gerald28** · 23-02-2007 02:26 PM

i have the same problem too!!!

sometimes, its louder, and sometimes its more quiet.

When driving in city traffic, it tends to be a bit more of a problem, and the noise is louder and they go for a bit longer (about 1sec).

It also happens when driving on a highway, but it doesnt happen as often, and the noise isnt as loud.

I dont think, its associated with the A/C. Mine seems to be coming from the centre of the car.
The car makes the noise, on flat roads, uphill/downhill, moving, stationery, going fast/slow.

**aaronng** · 23-02-2007 02:33 PM

Evaporator outlet you reckon?

**sendok** · 23-02-2007 02:45 PM

Yeah my friend's car got the same problem.. it sound when the A/C kick in.. but when he check up to the doctor.. the doctor said there is no problem.. just a freeze piping..

**EuroDude** · 23-02-2007 05:51 PM

I think my Euro has a similar issue.

When the car is semi-warmed up in the morning (quarter of the way up) and I slowly drive off, the car makes a whirring noise for a second when I engage the clutch in first gear and steer right.

The noise is quite loud and sounds like one of those party horn blower things:

The sound goes away after the first time.
Not sure if its the steering system or the clutch system..

**BiLL|z0r** · 23-02-2007 07:16 PM

Originally Posted by Gerald28

i have the same problem too!!!

sometimes, its louder, and sometimes its more quiet.

When driving in city traffic, it tends to be a bit more of a problem, and the noise is louder and they go for a bit longer (about 1sec).

It also happens when driving on a highway, but it doesnt happen as often, and the noise isnt as loud.

I dont think, its associated with the A/C. Mine seems to be coming from the centre of the car.
The car makes the noise, on flat roads, uphill/downhill, moving, stationery, going fast/slow.

Yerp, sounds like it. Definately does it more in traffic than highway.

**EuroDude** · 26-02-2007 08:18 AM

Found out that my 6MT makes the whirring noise when the clutch is ridden when semi warmed up.
(usually I dont ride the clutch but when the clutch is ridden you can hear the noise longer, the noise can only be heard for half a second when the clutch is used normally)

Anyone else get this noise?

**aaronng** · 26-02-2007 08:28 AM

Originally Posted by EuroDude

Found out that my 6MT makes the whirring noise when the clutch is ridden when semi warmed up.
(usually I dont ride the clutch but when the clutch is ridden you can hear the noise longer, the noise can only be heard for half a second when the clutch is used normally)

Anyone else get this noise?

I don't ride the clutch, so I don't get to hear it. But I notice that the first time that I'm take off in 1st from a standstill in the morning, the clutch slip is rough. But after that 1st time, every subsequent take off from 1st is smooth. It's as if the clutch material or the flywheel face has some oxidation on it.