Rattling noise engine
Sounds like a metal rattling noise during acceleration, & below 2000rpms? Just had Camshaft sensors replaced as well as MAF sensor replaced? What could the sound be?
My car has 140700 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
It is possible that these noises are coming from the engine itself. When not enough oil or the wrong type of oil is put in your engine, this can cause metal parts to wear down. The noise you are hearing may be a result of a low oil or wrong oil condition on your vehicle. I would recommend checking the oil level first and if it is low add some until it is full. If this does not resolve the issue, I would recommend having your vehicle inspected by a qualified mechanic at a local shop to determine the extent of the engine damage. Although this is the worst case scenario, it is possible that the engine may need to be overhauled or replaced in order to resolve this issue.
How to Identify and Fix Common car Problems ?
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Problem Description
This rattling noise should not be taken lightly as it warns of upcoming timing chain failure. The cause of the noise is faulty timing chain guide rails and timing chain tensioners that wear out well ahead of schedule. These components are there to keep the timing chain tight and properly positioned.
A Rattling Noise from the Engine When Accelerating
Noises coming from the engine when you are pushing on the gas could be caused by a loose or weak timing belt, chain tensioner, cracked flywheel, or a broken flexplate. These issues will only get worse over time, not better.
The most common reasons a Nissan Murano engine makes a ticking noise are low oil level or pressure, an issue with the ignition system, or an exhaust leak.
Detonation, Pre-ignition (Pinging) Noise
Most people call this a pinging or rattling sound. This noise is caused by an air/fuel mixture in the engine cylinder being ignited prematurely by the heat of compression as the piston is moving up on the compression stroke.
If you hear a rattling noise while driving, the first step is to not ignore it. The sounds and vibrations coming from your vehicle could be signs of a serious mechanical issue. Seek help from a professional who can find the source of the noise before any further damage is done.
A Rattling that seems to be coming from the front of a car engine could be an indication of a timing belt problem.
Knocking occurs when fuel burns unevenly in your engine`s cylinders. When cylinders have the correct balance of air and fuel, fuel will burn in small, regulated pockets instead of all at once. (Think sparklers, not fireworks.)
Damaged CV joint: The most common cause of a clicking or popping sound from the wheels is a broken CV joint.
When your vehicles timing chain is loose, faulty, not properly lubricated, or your oil pressure is off, it can cause an annoying ticking sound.
Under the hood, rattling noises suggest the water pump is ready to fail. Usually, the noise is most pronounced when the car is idle. In some cases, the timing belt pulley bearing may be causing the noise. When the timing belt or serpentine belt is ready to go, you probably won`t hear a rattle.
Rattling Noise – Once your catalytic converter becomes older or damaged from fuel mixtures, the honeycombs on the inside can begin to collapse and/or break apart which will cause a rattle to occur.
A rattling is a quick, often unsteady, burst of sounds. The sound of a rattlesnake is a good example of a rattling.
When your engine is lubricated properly with fresh oil, it should run fairly quietly. As the oil ages and it loses its ability to lubricate the components, the parts will start to move harder against one another causing friction and grinding. These rattling, rumbling, and knocking noises will be hard to miss.
There is a rattling sound. A lax timing chain, or worse, a broken timing chain with loose parts within the engine, will produce a rattling sound when your car is idling. This rattling sound is typically most prominent while the engine heats up and disappears after some time.
If your car`s transmission is poorly lubricated, metal components inside of it will grind against one another. This can lead to a rattling sound as gears wear down inside the transmission. Even worse, these gears may eventually make the transmission unusable.
You can check your clearances by inserting a thickness gauge between the lifter or rocker arm and the valve stem. If the noise is reduced, then the cause is excessive clearance and you will want to make the correct adjustments. If the noise persists, then it is most likely rough cams or worn lifter faces.
Has my car problem been fixed? This could cause momentary engine rattling, which goes away once enough oil is pumped from the sump. It should go away once you replace the oil with one of the right viscosity.
Adding more oil will make the noise go away, but it won`t solve the underlying cause of the noisy engine – the oil leak.
It might be a battery or alternator problem.
Perhaps your battery`s dead, or your alternator, which charges the battery, isn`t working correctly. If the source of the clicking is electrical, the starter (a small motor energized by the battery that gets the engine running) doesn`t have enough juice to stay powered.
The most common cause of engine ticking noise is low oil pressure. This is an indication that vital engine components are not getting adequate lubrication. Your engine may be low on oil or there could be a problem inside the engine causing the low oil pressure.
CV axle. If you notice that the clicking noise is most prominent when you turn your car, the most likely suspect is a CV (or constant velocity) axle. CV axles allow the car`s transmission to drive a car`s wheels and open up a range of motion with bearings.
The clicking sound that`s heard on start-up is nothing more than the fuel injectors pulsing on and off under the high pressures from the mechanical pump. Like the ticking sound, it also will decrease in intensity as the engine warms.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
The engine is making rattling very high noise when you start the engine and constant.
ANSWER : The fact that the oil pressure drops when slowing down or stopping would suggest that the oil pressure is lower at lower engine RPM’s. This means that the oil level volume is low. The oil capacity in an engine is designed to correlate with oil pressure at any given RPM. When it is full, there should always be constant oil pressure assuming there is no oil leaks. I would suggest having an expert from YourMechanic come to your home to diagnose your vehicle and make appropriate repairs to your vehicle.
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Rattling noise upon starting and then louder rattling at idle if load is placed on engine such as A/C
ANSWER : Hi there. Given your mileage and your maintenance of the idler pulley, your problem is likely worn/weak hydraulic lifters (or other valve train wear) or the timing gear set. Starting the engine briefly (less than 30 seconds) without the serpentine belt attached, will eliminate noises from all accessories if the problem is with one of them. I would recommend having the engine inspected in person by a professional so that the rattling noise can be diagnosed and properly corrected.
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Turned on back winow heater and engine made a noise …when lights are turned on engine makes a noise like it can’t take load ….
ANSWER : Hi there. It appears you have more than one problem with your vehicle. The noise coming from engine area with a load on the electrical system, may be a bad diode in the alternator. Continuing to drive the vehicle with a bad alternator diode, may leave you with a dead battery. The hot air coming from the vents sounds like blend door actuator(s) problems. I recommend the concerns your vehicle has, it be inspected by a certified technician like one from YourMechanic to pinpoint the noise and help you fix it accordingly.
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Hi I have a 1991 ford f-150 and went it turns on it makes a tickling and rattling noise somewhere in the engine.
ANSWER : Based on your video, it is very possible that a valve could be bent or sticking inside the cylinder head. I would recommend checking the oil level and condition to determine if the oil is causing this issue. If not, I would recommend removing the valve cover and inspecting the valves to determine if any damage exists. If any valves are bent or severely sticking, I would recommend having a cylinder head job performed to resurface all of the important parts of the cylinder head. This will also include a full cleaning of the head and valvetrain parts. After this has been done, the engine should run much better.
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Rattling noise from engine bay when acceleration pedal is pressed to keep RPM constant 2010 Honda Fit
ANSWER : Hello. Most of the time this is caused by the timing chain making noise in the engine. I will usually check the oil and replace it with the right oil and filter to see if it helps. A poor quality filter or the wrong oil can cause this. If the oil is fine then the timing chain itself may be failing or it may be a tensioner issue. If the chain seems fine then the noise may be coming from the exhaust if there is a loose heat shield. If you want some assistance with this, consider YourMechanic, as a certified mechanic can come to you to [diagnose where the rattling is coming from] https://www.yourmechanic.com/services/loud-squealing-or-rattling-is-coming-from-engine-inspection
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I hear a rattling noise when my truck is parked. But when I drive it the noise stops. It sounds like a metal ball is rattling around.
ANSWER : Often, some exhaust components like heat shields or hangers may rust or become loose and rattle over time and is pretty common for the type of sound you’re describing. If you are not experiencing any drivability concerns, the rattle may be from something small. The best thing to do would be to have an experienced technician like one from YourMechanic take a close look around the vehicle under the conditions that makes the noise the most prominent so the technician may offer a more personal diagnosis.
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Noise in the frontal area off the engine near the fan
ANSWER : Hello, thank you for writing in. There must be more diagnostic work and testing done to determine what the issue is. Without a drive or timing belt, the engine would either not run at all, or perform very poorly. This does not mean that an inspection of the timing belt/chain should not be done. There are other components in the timing belt system that can become damaged and cause issues. The valve and lifter consideration is valid, and can be inspected visually with some time and energy. Unfortunately you may also have crankshaft end play or a bad camshaft bearing. Use the location of the sound to help you determine what to check into first. One by one, check into the systems in that area until you find the culprit. For more help resolving the noise, contact our service department.
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My Toyota is making a noise when I start the engine and bogs the engine down for a second then goes away.
ANSWER : Hi there. A binding accessory could be causing your concern. Simply remove the drive belt and recheck. If the problem goes away, this eliminates the fear that there could be something goin on with the engine or transmission internally. It sounds like this could be the water pump. If the water pump is binding or leaking, it can cause the belt to slip and make it seem like the engine gets bogged down. Usually a visual inspection quickly uncovers the leak. However a properly executed pressure test is the best way to uncover leaks, both current and potential. I suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a car is making a noise inspection.
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