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Old 10-06-2003, 01:51 AM   #1
menace3054
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Engine Whine when its Cold Out

For about the past 2 weeks ive been hearing a whining noise from my engine. But, the problem is that it only happens occasionally, and usually only when its very early in the morning (cold). Its a loud whine from the engine itself, i tried taking a vid for the audio, but I can never get it to re-make the sound when i need it to. That also presents serious problems with taking it to the dealer. Anyone have this problem? after it heats up, or if its heated i dont hear it...
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Old 10-06-2003, 02:03 AM   #2
laalala
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I also hear somthing from my car. I don't know this sound is coming from engine or dash board. Mine sound like rattle noise when car is moving and I step on the gas. I can't really tell where it is coming from....help
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Old 10-06-2003, 05:22 AM   #3
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This is just a guess....

The whine could be shot bearings on your alternator.

On a cold morning, the car switches on things like heated mirrors and heated rear glass automatically - this is heavy load on the alternator, and if the bearings are worn, you will get a whine. Soon as things warm up, the load switches off.

To check it, try turning on the heated rear glass manually , main beam headlamps and seat heaters as well if fitted and see if the whine starts up.
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Old 10-06-2003, 06:31 AM   #4
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i did not know that

i have to try that on my car.
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Old 10-06-2003, 06:44 AM   #5
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Bob

I'd hope - as your car's a 2003 - that the alternator shouldn't be worn yet!!!
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Old 10-06-2003, 03:39 PM   #6
menace3054
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mines definately not the alternator. its comming from the engine itself, and Im in AZ a cold moring here is 60 degrees, my heated glass doenst come on.. any other guesses?
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Old 10-06-2003, 04:52 PM   #7
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heated glass is always on..

anyways, when ever i start my carup in the morning and get ready to go... if i dont give the car alot of gas, and try to slip the clutch out, it sounds like my belts are screeching.

it usually hapens when my rpms dip below 1k and im tryin to get in gear.

is that what u hear, a screech?
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Old 10-06-2003, 06:25 PM   #8
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OK - I guess my definition of cold mornings ( UK ) are somewhat different to a cold morning in Arizona.

I know the noise appears to be coming from the engine, but noises like this are very difficult to locate exactly.

Does the pitch of the whine change with engine revs?

Within the engine, the only rotating components are the crank and the cam shafts; I've never heard of a whine from the crank; the cam shaft is chanin driven, so problems here tend to be metallic rattles.

If its not the alternator, then that leaves four possible culprits.

Power Steering pump, a/c compressor , water pump and - if you've got an auto box - torque converter.

To test whether its associated with the power steering, then when you get the whine, stick it hard onto full lock..does the whine get worse?

a/c compressor....turn off the a/c on the climate control, does whine stop.

Water pump - no easy way to fault this; if it is the water pump bearings, then its only a matter of time before it starts leaking. The fact that the whine stops once the car has warmed might point at this as a likely cause.

If you've got an auto box, then the torque converter can whine loudly if its starting to wear, and is cold ( the fluid is more viscous, and converter slip is more pronounced )....but this is the least likely.

To try and identify where the sound is coming from, it can be helpful to use a long shafted screwdriver, placing the blade of the driver on different places around the engine and ancilleries while placing the handle into your ear ( honest, this works! ), the sound is then amplified along the screwdriver and allows you to trace the area that the noise is coming from.

After that....I'm out of ideas......
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Old 10-06-2003, 06:55 PM   #9
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my service tech said, over the phone, that it is most likely the air pump because if it were the water pump it wouldnt go away after a few minutes. But, ive had this car for almost 3 years, im pretty sure I would have heard it before!
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