Loud Rattling From Under The Hood
A loud rattling noise coming from under your vehicles hood is a problem that needs immediate attention. Since the cause could be so many combinations of malfunctioning components, it would be impossible to list them all. Unless you want to make the problem considerably worse, you should begin the troubleshooting process right away. Common causes of loud rattling noises can be issues with the air conditioning clutch, a malfunctioning belt, scored piston, and more!
If you are searching for replacement parts, used car components, or salvage auto parts to fix a loud rattling noise from under your hood, browse through our extensive inventory of salvage vehicles before you spend money on replacements that are direct from the factory.
Ac Hissing When The Car Shuts Off
A hissing noise is another common sound drivers hear from their cars air conditioner. The good news is this doesnt always spell trouble.If you hear the AC hissing after you turn your car off, thats actually just your cars way of equalizing pressure.
See, theres both a high pressure side and a low pressure side in your system when the AC is running. A refrigerant like Freon moves between these two separate sides which are divided by either an expansion valve or an orifice tube.Turning off your car will cause the Freon to move from the high-pressure part of your AC compressor down to the side with lower pressure to equalize out.While AC pump noise is totally normal for your cars air conditioner, hissing at any other point may give you reason to visit your mechanic, just like a buzzing noise.
How Your Brakes Can Cause A Grinding Noise
Disc brake pads and drum brake shoes are a frequent contributor to grinding noises. Grinding noises appear when the brake friction material or brake linings have worn away and the steel brake rotor is rubbing against the metal brake pad backing. This causes metal-to-metal contact when the brakes are applied, creating a grinding noise.
This grinding is generally a very loud noise and will only grind when your brakes are applied, making the diagnosis very simple. Typically, the grinding noise will come from either the front or rear brakes, but not generally both. The repair for grinding brakes is simply a brake job or brake overhaul on the affected set of pads.
Don’t Miss: What Do You Need To Get Your Car Inspected
Can An Alternator Cause My Car To Make A Whining Noise While Driving
Yes, it sure can! Your alternator has bearings inside that allows the pulley and stator to spin with the engine belt. If the belt is rubbing on the pulley due to misalignment or the bearings are worn out your alternator could indeed make a whining noise. Usually, these sounds would be described more as a squeak with the engine belt or a hum with bad bearings, so get your car started, then pop your hood and listen carefully to what the noise sounds like.
Why Is My Car Making A Grinding Noise
Cars make different sounds. Some are good, some are bad. A grinding noise, for instance, is bad. Have you been hearing some unpleasant grinding or clanking when you accelerate, turn, or brake? There could be;a number of;explanations why youre hearing it. Keep reading to see what the;problem might be.;
You might also like:;What does regenerative braking do?;
Also Check: When Do I Get My Car Title
Why Does My Car Make A Grinding Noise When Accelerating And How To Fix It
If you are wondering why your car makes a loud grinding noise when you are accelerating, then you are not alone.
This is a common occurrence for many drivers, and it can be very annoying and frustrating to hear a horrible grinding sound when you are trying to enjoy the ride.
Luckily, we have five of the most common causes of this issue, and have provided you with easy, simple solutions to fix the problem.
Grinding Or Scraping Noise When Braking
This is almost a dead giveaway. A squealing, scraping, or grinding sound that occurs as soon as you apply the brakes simply means that theres a problem with the brake system of the car. While the brake rotors and brake pads are essentially made of tough materials, they hardly last your lifetime. Every time you apply the brakes, the brake pads rub against the rotors in an effort to stop your vehicle from moving. This causes friction and can slowly wear the surface of the brake pads, exposing the metal parts of the caliper. If these metal parts touch the rotors as you apply the brakes, youd get a loud grinding noise.
Other potential causes of unusual noises when braking can include low-quality brake pads. Most of these contain metal chunks that can rub and scrape the rotors surface. This not only produces a scraping sound but damages the brake rotors as well. Dirt, grime, and dust can also collect on the brake system, but most especially between the rotors and the caliper. The thing is that this noise is ever present, whether you apply the brakes or not. Other causes can be worn-out rotor discs and even a broken shim.
Recommended Reading: How To Wash Ceramic Coated Car
How To Do A Visual Inspection Of Your Vehicle
All automotive such as cars, trucks, motorbikes, and so on need regular inspection and maintenance in order to make sure that everything is in a good condition and everything is working smoothly.
Here is when, how often, and how you can do a visual and auditory inspection of your vehicle to ensure that everything works as they should, or if not, to find out what the problem is and be able to resolve it quickly.
Knocking Noise Under A Car When Going Over Bumps
Looseness in your suspension usually cause a knocking noise when you go over bumpy roads or potholes. Its possible your struts or shocks are leaked out, your stabilizer links or sway bar bushings are worn, or your control arms are loose.
Knocking noises are early indicators, telling you to get it addressed before serious failure occurs. When suspension components let go completely, you lose control of your car. Thats when accidents happen.
Don’t Miss: What Kind Of Speakers Are In My Car
A Rattling Noise And Roar That Gets Louder When Accelerating
A roar could be a frightening thing. Thats the thing with sounds and a car the louder they are, the more expensive they sound.
When the rattle is combined with a roar, you could be really lucky here. It could be your exhaust system.
It could either be damaged or it could be loose . Either way, this should not be a high-ticket fix.
If its not the exhaust, it could be your transmission and thats no fun. If youre driving an automatic, your transmission could be experiencing problems engaging the next gear.
On a stick shift, the clutch could be slipping.
Also, please listen to the sound carefully. If it starts as a roar and then becomes a hum, possibly even a whine, it could be your wheel bearings.
A quick way to tell is to keep an eye on your RPM. When accelerating, your RPM will rise. Cruise at a steady speed for a while, and then lift your foot off the gas. Keep your eye on the RPM and watch it drop.
If the noise is still there, even though the RPM has dropped substantially, the sound is not coming from the engine.
In any of these cases, head over to a mechanic for a proper diagnosis. Go straight there! If left unchecked, it could quickly go from a few dollars to a pricey excursion!
Ma Honda Cr V Makes An Increasingly Loud Noise When I Accelerate:
If, on the other hand, you have the feeling that the more you gain speed, the more your noise at acceleration on Honda CR V gets loud, then you will have to look at the rolling parts of your automobile. Indeed, if this loud noise does not surface when you iddle, it is surely linked to your transmission, and, in general, to your wheels. The most known cause is the state of your bearings, so make sure you verify their condition to make sure it is not the cause of this loud noise when you accelerate. If not, go to this content page about the noises related to Honda CR V noise wheels.
Recommended Reading: Where To Copy Car Key
Why Is My Car Making Whining Noises When I Turn The Steering Wheel
It is very common for car owners to experience a whining noise when accelerating. Cars can make these whining noises from 1 of 2 places. The transmission or the power steering system. They make similar noises because the working fluid and pumps in each have very similar designs. Luckily, the pumps are in very different places so its usually easy to tell if you are experiencing an automatic transmission problem or if you need to check the power steering fluid. If the noise is from the front of the engine, then its a;power steering pump noise.
Generally, there are three different types of power steering systems commonly used in vehicles in the US today. ;A pitman arm style system uses a rotary valve and steering gear to transfer the motion of your steering wheel into hydraulically powered motion of a pitman arm. ;The pitman arm then moves the steering linkage to turn your wheels. ;The other system is called a rack and pinion system. ;This system turns the motion of your steering wheel into the lateral movement of a steering rack which is used to move your steering linkage turning your wheels. ;Lastly, many new vehicles are being fitted with electric power steering systems to help increase fuel mileage. ;In all belt driven power steering systems, the pump is the same. ;In electric power steering systems, some use an electric motor to pressurize the fluid while others skip the hydraulic fluid and just use an electric motor.
Cause #1 Transmission Issues
There are a lot of different sounds a transmission might make, most of which suggest its going out. However, if you hear a grinding noise coming from it, its likely already too late.
An automatic transmission grinding noise while accelerating suggests that the planetary gear system is worn. If you know how the system works, then you should easily be able to understand how even the slightest bit of damage could throw things out of sync.
If you dont, then watch video below for a visual explanation.
Simply put, it stems from the speed of the wheels not being on the same page as the engine. It may grind the entire time youre accelerating, or it may only do so in a specific gear.
Regardless, this is definitely not an issue to ignore, unless you enjoy high repair bills .
How To Fix
As one of the most complex components of a car, working on an automatic transmission yourself is not recommended. If your car makes a grinding noise while accelerating and it ends up being the transmission, youll need to take it to a professional.
More than likely, youll have to have it replaced. Check out our previous article for an in-depth look at transmission repairs and how much they cost.
Read Also: How Much To Get Car Detailed
Chirping Squealing Or Squeaking Noise
If you hear a high-pitched squealing or squeaking sound coming from under the hood, it probably means your cars serpentine belt, which powers several of the vehicles accessories, is worn or loose. Have it checked and/or replaced before it breaks and the car loses its power steering, charging, engine cooling, and air conditioning.;
Loud Noises When Idling
Fixing a noise you hear when the car idles can be as simple as filling up on oil.
All engines begin to make some unnatural noises over time. Wear and tear on engine parts are unavoidable, and sometimes, even idle engines can make noises that arent quite right. Ideally one would only be able to hear the pistons going up and down. However, keep an eye out for other noises – such as clunking, grinding, or screeching – so that you can fix any issues before they get extensively worse. Persisting engine noises that are present while the engine is idle can include:
- Try adjusting your valves. They could be stuck.
- The engine is low on oil. Check the dipstick. If this is the case add some.
- Low oil pressure.
Read Also: How Do I Get My Car Title In Florida
Sound #3: A Cat That Doesn’t Want To Be Touched
- What you hear:Sounds like a grumpy cat, “rur rur rur,” when you start the engine.
- Whats happening:Your battery is losing juice and is struggling to power the engine.
- Cause for concern? This is less of a safety concern and more of a convenience concern, as your car could end up failing to start tomorrow, next week, or next monthit’s tough to make an exact prediction. A slow engine crank paired with this unfortunate noise means your battery is on the fritz. It may be low on fluid, be past its prime, or need a jump. Head over to your local Firestone Complete Auto Care for a free battery test and our car whisperers will let you know how much “life” is left in your battery. Or, give your car a virtual battery test online!
So Why Does The Car Make Noise When Accelerating At A Low Speed
The noise from a car often begins when the speed is zero to thirty or 40 mph and stops when the vehicle goes past 40mph. If you have such a problem, then it means there could be a problem with the motor mount, pulleys, torque converter, or the transmission fluid level. So you should check them to ascertain the cause of the problem.;
However, a squealing or squeaking noise while accelerating could mean that your cars engine belt is problematic. It can signify that the belt is worn. Moreover, a loud rumbling sound might suggest issues with the cars exhaust system.;
Here are some common noises and what they may signify in a car if you hear them, especially when trying to increase the cars low speed
Don’t Miss: Where Can I Store My Car
Why Does It Sound Like Metal Scraping When I Drive
Scraping or grinding noises you hear while driving or turning can be caused by the following issues: Worn or failing brake parts: Unevenly worn or rusted rotors or worn or thin brake pads. Worn dust shield thats moved closer and contacting the brake rotor. Loose, worn, damaged, or failing wheel bearings.
Engine Smoking Or Hissing
A plume of steam or smoke could very well accompany a hissing noise from your engine. Thats the sound of coolant escaping, usually related to an overheating condition. Thats bad news for any engine.
The most common problems related to hissing noises are a blown cylinder head gasket, a failing water pump, or a leaking radiator. But if your engine has already overheated, you could be in for a pretty severe repair bill. In the case of a blown engine, you should probably sell your blown engine car.
Read Also: How To Remove Scratches From A Car
What Is Causing My Cars Squeaks Creaks And Clunks
These sounds usually come from out near your wheels and indicate a worn suspension component and happen on rough roads, speed bumps or when pulling into or out of parking spaces. ;Where the sound is coming from exactly can be difficult to pinpoint. ;Try bouncing each corner of your car while your car is parked, or turning your steering wheel from lock to lock while stopped and listening for the sound. ;For a more in-depth;procedure for diagnosing where your suspension problems are, check out our article about suspension noise.
The Transmission Fluid Level
Its not a major issue, but you would want to check it to rule out the obvious cause. The fluid should exactly be at the level instructed in the owners manual. Low level of fluid is one of the reasons for causing;rattling noise when accelerating. Its a simple issue with a simple fix, but the consequence could be outright scary.
Low transmission fluid level could the source of the rattling sound when accelerating.
Also Check: What Kind Of Car Did Columbo Drive
How Do You Diagnose A Bad Wheel Bearing
Here are some indicators of a worn wheel hub bearing or other wheel -end damage: Snapping, clicking or popping. Grinding when the vehicle is in motion. Knocking or clunking. Humming, rumbling or growling. Wheel vibration and/or wobble. Shudder, shimmy or vibration at a constant speed.
Sound #6: A Giant Groaning Yawn
- What you hear: When you turn the steering wheel, the car groans and whines like it just woke up from a deep and pleasant slumber. The steering wheel may also feel stiff and unresponsive.
- Whats happening: Something in your power steering system is causing friction. According to the folks at CarTalk, your power-steering pump could be about to say, “Farewell!”
- Cause for concern? Yes. Have your power-steering system checked out. As the problem worsens, youll slowly lose control over the cars steering. You could also cause further damage to the rest of the power-steering system. This is a significant safety issue. Schedule a checkup at your nearest Firestone Complete Auto Care location as soon as you can. In the meantime, try not to make any fast or sudden turns.
Recommended Reading: How To Jump Start My Car