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Air leaks can create a hissing sound, which is usually more noticeable when the engine runs. The sound can be caused by a loose or damaged component, like a loose fitting or cracks in the air intake system or exhaust pipe. The severity of the issue can vary depending on the make and model of your car. Sometimes, the sound may show a minor air.

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Lil PZEV said: I've noticed if the AC's running and the car is shut off, it makes a strange sound towards the front (condenser area), it kinda sounds like a hissing noise. That's when the Freon (or whatever it's called) gas molecules settling down, I think. Don't quote me on that ( PLEASE DON'T [paranoid]). In addition to the noise 03zx3hatch.

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When you turn off your car and hear a hissing noise coming from the engine, it is generally an indication of a leak somewhere in either the cooling system or vacuum system. The sound is usually quite distinct and often louder than other regular engine noises. If you hear the hissing immediately after turning off your car, this may be a sign.

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Fluids can emit bubbling and gurgling noises, and the coolant is usually the one responsible for this. Coolant transfers the heat away from the engine and other hot areas by flowing through the radiator. You may hear it flowing even a few minutes after turning off the engine - this is completely normal.

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2. Weather. You might be wondering how the weather causes the knocking sound. Well, during winter or cold weather, the environment will be cold but when you turn on the vehicle, heat will be generated. This heat from the engine and other sources will expand some parts of the vehicle, especially the metal parts.

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Usually when you hear a hissing sound coming from your amplifier, it's an indication that the gain is set too high. To remedy this, quickly turn down the gain on the amplifier and simultaneously turn up the volume on the receiver. Make sure to adjust both of these settings to reach a balance that minimizes or eliminates any hissing noise.

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A hissing noise coming from under the hood of your car is often indicative of a leak in either the cooling or vacuum system. In particular, if you hear this sound immediately after turning off your engine, then it's likely that oil or coolant has leaked onto an exhaust manifold or other heated engine component.

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1. Damaged or failed head gasket. One possible reason why your car is making noise after the engine is turned off could be a damaged or failed head gasket. The head gasket plays a crucial role in sealing the combustion chamber and keeping oil and coolant separate. So, if it becomes damaged or fails, it can lead to various issues.

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Some car engines can be quite noisy when they are running, but if you notice a sizzling or hissing sound coming from the engine bay after turning off your car, it could mean that something is leaking. It is important to take caution when trying to identify the source of the leak; fluids and air may still be dangerously hot or harmful to touch.

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Regular Oil Changes and Filter Maintenance. To avoid knocking sounds after turning off the engine, perform regular oil changes. Fresh oil lubricates the engine components, preventing wear and reducing noise. Remember to replace the oil filter too, as it ensures clean oil flows through the engine.

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When the engine is turned off, the enlarged parts make a banging noise and then return to their normal shapes when they cool down. 6. Preventing idle noise in your vehicle. If you can isolate the root of the problem, you should eliminate the "cause.". For instance, if your engine's oil level is low, you should add more; if the problem is.

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July 5, 2019. #2. The a/c system will continue to "evaporate" until the pressure in the system equalizes once the system (car) is shut off, this could be the sound your hear. Pure water from the evaporator drain is normal and necessary, make sure the drain tube is clear of debris and unobstructed. 1997 SPORT.

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The Four Common Causes of a Hissing Sound Coming from Your Car. Cooling system leak. Engine overheating. Damaged hose or vacuum. Exhaust leak (from the rear of the car) A leak in the cooling system. The main job of the coolant system, you guessed it, is to cool down the vehicle.

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Reduced power: If the hissing sound is caused by a problem with the air or fuel delivery system, it can result in reduced power and performance. This can make it more difficult for your vehicle to accelerate or maintain speed. Overheating: Coolant system issues, such as leaks, can lead to overheating of the engine.

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Yes, totally normal. The noise is basically water being pumped to cool the turbocharger. Like. B. ben__allen. 1458 posts · Joined 2004. #5 · Nov 3, 2009. I get this on my Dooper sometimes, espesh after a motorway run, and wondered what it was. .

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5. Low Level of Coolant Fluid. As already mentioned, the cooling system circulates a liquid coolant through the engine and the radiator. If the coolant level is too low, it can cause your engine to overheat and create a hissing sound. It's because, in that case, the hot coolant escapes from a leak or a crack.

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