How to solve the problem of loud engine aspiration sound?

Hello subject, the engine is very loud, it is better to go to the repair shop to check it. Check whether the oil level is normal, check whether the oil pressure is normal, check whether the parts in front of the engine are loose and abnormal, and check whether the engine is loose and abnormal, and the abnormal noise must be checked before the fault can be eliminated. Thank you!

If the engine is running with a dull sound similar to a lap, it may be due to a problem with the cylinder valve. In this case, if you drive the car very fast, the sound will disappear in fast running. Therefore, once you drive fast, the sound will disappear, and it is most likely due to the problem of the cylinder valve.

In addition to this, it is necessary to check the problem of oil pressure as an exclusion. There is also a situation where when you step on the accelerator, there is that kind of thumping leak sound. It is possible that there is a leak from the exhaust pipe, in which case gasoline will be consumed a lot, so it is necessary to check the condition of the exhaust pipe at this time.

Hello, the loud engine sound is caused by carbon deposits, you need to clean the carbon deposits in the engine combustion chamber, fuel injectors, intake valves, and throttle valves, and finally pour the exhaust cleaner into the fuel tank to clean all the carbon deposits in the gasoline circuit.

Generally, there is no effect, you can go to a professional 4S shop and let the maintenance technician help lift the cylinder head to see, if the valve is not damaged, there is nothing wrong. Now the vehicles are all EFI trucks, and when the driving computer sends a signal, there will be a Tata sound. No big deal.

If you start in the morning, leave it alone, it's fine.

Generally speaking, if the valve is loud, it will not have much impact on the performance of the car, and you can go to the repair station to adjust the valve when the car is 10,000 kilometers under maintenance.

When diagnosing excessive engine noise, the first step is to rule out the noise caused by accessories, such as those generated by air compressors and power take-offs, and do not mistake these noises for engine noise. Remove the accessory drive belt to exclude noise caused by these units. Noise can also spread to metal parts that would otherwise be fine.

Therefore, the use of a stethoscope will help to determine the location of engine noise.

If the noise varies with the speed of the crankshaft (engine speed), the noise may be related to the crankshaft, connecting rods, pistons, and piston pins. If the noise heard varies with the camshaft speed (half speed of the engine), the noise may be related to the valve transmission components. A hand-held digital tachometer can help determine if the noise is related to a component running at the speed of a crankshaft or camshaft.

Engine noise can sometimes be isolated by removing the plunger of one injector at a time. If the noise volume decreases or disappears, then that noise is related to that particular engine cylinder where it is located.

There is no set rule or test method for determining noise.

Engine-driven components and accessories, such as gear-driven fan clutches, hydraulic pumps, belt-driven chargers, air conditioning compressors, and superchargers, can contribute to engine noise. The following information can be used to guide the diagnosis of engine noise:

Main Bearing Noise The knocking noise caused by the loose main bearing can be heard when the engine is under load, and its sound is loud and dull. If all the main bearings are loose, a loud, short knocking sound will be heard. This percussion sound is regular and varies with the rotational speed.

This noise is loudest when the engine is dragging or driving under heavy loads, and this knocking sound is druffier than the noise produced by the connecting rod. Low oil pressure will also accompany this.

If the bearing is not loose enough to produce a knocking sound on its own, if the oil is too thin or if there is no oil on the bearing, the bearing will produce a knocking noise.

An irregular noise may indicate crankshaft thrust bearing wear.

Intermittent sharp tapping is an indication that the crankshaft clearance is excessive. Repetitive clutch action may cause a change in this noise.

Connecting Rod Bearing Noise Excessive linkage clearance can cause knocking noise at various engine speeds, i.e. idle and load conditions. When bearings begin to become loose, this noise can be confused with the sound of a piston slapping or the noise of a loose piston pin. The volume of noise increases with the speed of the engine.

Low oil pressure will also accompany this.

Piston Noise The most difficult part is to point out the difference between piston pins, connecting rods, and piston noise. A double-click sound caused by a loose piston can usually be heard when the engine is idling. When the injectors of this cylinder are removed, the sound of this knock will change significantly.

However, on some engines, this knocking sound becomes more pronounced instead when the vehicle is driving on the road at a steady speed.

The engine valve sound can be done in the following ways: 1. The engine valve sound may be caused by valve leakage, outside the valve door, it is more obvious at high load and low speed, you can remove the cylinder head, grind the valve, check the valve spring elasticity, and readjust the valve clearance; 2. The engine valve sound may be when the engine is idling, there is a continuous knocking sound between the tail end of the valve stem and its driving parts, the treatment method is to readjust the valve clearance, if the lock nut on the adjustment screw is loose, it should be locked firmly, and the parts with serious wear should be replaced; 3. It may be that the surface of the valve seat ring is rough, the machining accuracy is unqualified, the interference of the seat ring is not properly selected and loose, and the valve seat sound caused by excessive deformation after heat, the treatment method is to re-inlay the valve seat according to the requirements of the assembly process, the upper end face is flush with the body plane, and the higher part should be flattened.

The solution to the loud engine is as follows: 1. The foot rubber is a rubber block spread between the engine and the frame, and its function is to reduce the vibration and buffering of the engine when it is working, and play a role in fixing the engine. If these rubbers are aged or slackened, they will cause vibrations in the engine, and the faster the speed, the louder the vibration will be.

The treatment is to tighten or replace the foot glue. 2. The use of oil is incorrect. If the viscosity of the oil is not consistent with the viscosity of the engine, carbon tends to accumulate and the engine noise becomes louder.

If the viscosity of the oil is too low, the lubrication will be insufficient, causing the engine parts to wear out and make abnormal noises. If the viscosity of the engine oil is too high, the load on the engine will become higher and noise will be generated. The way to deal with this is not to mix different brands of oil using the oil label on your car's manual.

3. The lack of cylinders mainly refers to the engine one or only one or more cylinders are not working properly, generally speaking, the exhaust gas flow of the car emission has obvious intermittent movements, and the exhaust pipe shakes violently, resulting in the engine "suddenly". The solution is to check the working condition of each ignition coil and cylinder spark plug.

The reason for the large valve noise of the engine is mainly to cause the increase of engine working noise, although it will generally not have a serious impact on other aspects of the engine, the solution of the large valve noise of the engine: 1. If the engine valve noise is very loud, the valve clearance should be readjusted, and if the lock nut on the adjusting screw is loose, it should be locked firmly and the parts with serious wear should be replaced; 2. If the valve leaks, remove the cylinder head, grind the valve, check the valve spring elasticity, and readjust the valve clearance; 3. When the engine is idling, it makes a rhythmic "da, da" sound, when the engine speed increases, the sound is also accompanied by an increase, and when the medium speed is above, the sound becomes blurry and noisy, the engine temperature changes, or the out-of-stock experiment is done, and the sound does not change.