An in-time solution always does more good than harm. Sometimes the car makes some strange noises that you don’t usually hear. It’s very likely that those sounds indicate that your car is having some problems. Below is the list of 5 sounds to look out for.
Wheel's Chirping or Squealing Noise
If these sounds come from the surrounding of the wheel, they probably suggest that the wheel bearing or axle bearing are faulty. The variation of the speed often affects the pitch and behavior of the noises, or even disappear at certain points. Fix it immediately, otherwise, it will cause bearing failure, leading to the locked-up wheel or loosened bearing.
Sometimes the bearing just can't bear, pretty ironic, no?
Don’t mistake wheel bearing noise for groaning, creaking or scraping sounds, if these sounds exist, they probably come from the brakes instead. Under humid weather condition, the brake pads are slightly more swollen than usual due to the moisture, causing it to groan or creak. Over time, it will dry out by itself and get back to its normal shape.
A clicking sound being heard whenever you turn might indicate a failed outer constant velocity joint.
Grinding Noise from the Brakes
As mentioned above, under the moist condition, the brake pads get swollen and cause groaning, if it’s the semi-metallic pads, the noise will change to the squeaking sound. It sounds like a temporary problem, but as advised, the brake should stay quiet at all time. With that being said, noisy brake indicates trouble, accidents don’t wait for the weather to dry out, actually, it even favors such weather. Scraping noise might also imply deteriorated brakes, meaning that it not only sounds awful but also puts you in danger while in the traffic. Don’t ignore the problem, get it checked immediately as soon as you hear a sound coming out. If the brakes are severely worn, the friction material might not stick to the backing plate, prompting the metal contact, which is very harmful to the rotors. Naijauto.com has also discussed 4 reasons your car makes squeaking sound when braking in a previous article for your further information.
Brake pads are unstable, that's why it needs a constant inspection
During the driving or after turning the engine off, if there is a hissing sound coming from the engine, it means the cooling system is malfunctioning, most likely resulting from a coolant leakage. Check the gauge to know exactly whether if your engine is really overheating or not. If it is a case, stop and flag down some help if you are in the middle of nowhere, or simply call a towing truck if you are in the city. In an extreme case that you cannot do either of the actions, you are still able to save the car by yourself.
To start, slowly open the hood, check the cooling system, specifically check for any coolant leakage from the radiator, hoses or the engine. If there is a sweet smell or steam coming out, it indicates that antifreeze is leaking from the system. Under any circumstance, wait for the engine to cool down before opening the radiator cap, for it can burn you with hot steam. If you have a bottle of coolant available, wait for the engine to completely cool down before adding it to the system.
Be careful of the steam for it can burn your skin
Side note: Coolant refilling is only a temporary remedy in this situation because the reservoir is still leaking. There are some cooling system leak sealer products that can reduce or halt the small leaks, but it wouldn’t be as effective when it comes to bigger leaks, it also doesn’t work with leakages that are directly related to water. In the end, the broken part needs to be repaired.
Engine Clicking/Tapping sound
For the record, the engine is already noisy, but there are some certain noises that you might want to focus on. Tapping or clicking sound from under the hood implies that either the oil level is insufficient, or the normal oil pressure is not developed. The clicking is taking roots from the valve train. If the reason for low oil pressure is because of the oil level being too low, or because of the failed pump, the hydraulic lifters may break, causing a bigger valve lash, and in turn, it creates the uneasy noises. The noises either comes from the valve or the surrounding of the valve caps on the top.
Check the gauge to know the status of the oil level
In this case, you need to stop the car, let it rest for a while, and check the oil level, you can do it easily with the dipstick. If it is below the recommended level, refill it to the limit mark. Prevent the oil from spilling out of the crankcase. Make sure you checked for oil leak before starting the process, if you don’t want to yield anything after the job. Check the pan gaskets, valve cover, crankshaft end seals, those are the place where the oil leak is likely to occur.
If the noise lingers after the fix, and the oil pressure gauge shows insufficient oil pressure, you will need to stop again. Running while your car is on low oil pressure might further damage your engine, leading the damage of your wallet. There are some more sounds that you need to beware of. A deep scrapping sound might indicate degenerated rod bearings, or it’s time to say goodbye to your engine.
If there is a metallic knocking sound that can only be heard whenever the engine is under a great load of power, chances are there are detonations inside your engine, a hidden destruction in form of abnormal ignition and combustion. It can be caused by carbon soot clogging the chambers, low octane number, failed cooling, faulty EGR system, or premature ignition.
If the exhaust system isn’t intact, you will probably hear the roaring sound from the undercarriage, especially when accelerating. While the noise is harmless, it is an effective sign that you need to fix your exhaust system. The most harmful part is there is a probability that the exhaust gases get inside the car interior. It contains Carbon Monoxide which is fatally toxic. In short term, it reduces your concentration and your reflex. In a long run, it literally causes cancer. About 8 ppm of CO can cause mental malfunctioning. 1% of it can almost immediately kill a person.
Exhaust gases contain carbon monoxide, which is very dangerous for human
It's most likely to happen when the vehicle requires more fuel to generate the power, giving the exhaust gases a higher chance to leak into the compartment. There are more dismal health issues exhaust fumes may cause you, check out this article Hazardous health effects from exhaust fumes to be aware!
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