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A bad bearing in the water pump could be one possibility.

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Q: Can a car's cooling system cause a loud noise when idling?
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What would make a gurgling noise while idling and at low speeds in a 2001 Dodge Grand Caravan Sport?

Low coolant? Cooling system airbound?


Why would your car get loud as you accelerate?

As the engine revolutions increase, so does the noise from the engine as it is working harder as opposed to being still idling. Also, could be a leak in your exhaust system that could be the cause of the additional noise.


What would cause a louder then normal noise when accelerating and idling in a 1996 Toyota Camry?

Could be your timing belt.


What would cause a whistling noise coming from whats seems underneath center rear of the car the car is a 2005 Chevy Equinox doesn't happen when idling or braking?

I would think that you have a leak in your exhaust system.


Does the idler pulley cause rough idling?

No. The idler pulley only maintains tension on the serpentine belt. A faulty idler pulley can cause noise and a loose tensioner arm can cause belt slipping but other than having a similar name, it has nothing in common with engine idling.


Your van makes a humming noise when your car is idling and when you accelerate the gas pedal?

This might be the cooling fan which in today's cars is electric and runs only when needed, not continuously like the 50's and 60's vehicles. When you sit idling, with no cooling air passing over the engine, the coolant temperature rises and causes the fan to switch on. This could also happen during acceleration.


What is the noise from the front end of my Ford Mondeo 2001?

It is the fan blower for the engine cooling system (Radiator)


What would cause an intermittent grinding noise from the starter when the car is idling and when changing gears?

if it is in fact the starter, it is probably engaging the flywheel. starter may be faulty.


What causes gurgling bubbling noise in Toyota Camry 2006 model?

Overheating or air trapped in cooling system.


What causes a humming noise while driving or idling and in any gear in an automatic transmission cavalier but only after driving for about 10 minutes?

Could be your cooling fan. And depending on what year your car is, you could have two cooling fans. My cavalier did the same thing. The fan would try to go on when the car heated up, but couldn't. I heard a distinct humming noise with it. It didn't cause any problems until I got stuck on the highway in the summer and my car almost overheated. Take it to a service station.


What would cause a humming noise when the engine is idling on your 2001 Dodge Caravan SE?

Noises are impossible to correctly diagnoise unless you hear them. TAke it to a good diagnoistition.


What would cause your 1996 Taurus to make a light whiring noise while accelerating - cruising but make a winding down- grinding noise when you let off the gas yet sounds normal when idling?

Check the idler pully.