Why does the diesel engine ring the car, and the diesel engine will sound as soon as it is refueled?

Diesel engines in good technical condition should operate in a balanced manner under various working conditions, with pure sound and no obvious noise. If a certain part of the engine fails, or the parts are loose, or the matching gap is out of balance, or the combustion is abnormal, etc., the engine will have abnormal noise in the work. By determining the cause of abnormal engine noise, engine failures can be detected in advance and problems can be eliminated in the first place.

1.Engine vibration and abnormal noise are generally caused by the poor support of the diesel engine.

2.If the engine makes two revolutions (i.e., one working cycle of the engine) and the abnormal noise occurs once, the cause of the failure is mostly in the camshaft-related parts, such as valves, push rods, valve springs and timing gears.

3.If the engine rotates once, the cause of the failure mostly appears in the parts related to the crankshaft, such as pistons, piston pins, piston rings and connecting rod bearings.

4.If the abnormal sound occurs continuously, and the abnormal sound has a certain regularity, most of the fault parts appear on the rotating parts, such as continuous knocking sound, mostly in flywheels, timing gears and other parts.

5.If the abnormal noise occurs intermittently and the sound is irregular, the cause of the fault mainly comes from the accessories of the engine, such as generators, water pumps, air compressors, starters, etc., which are loose or scratched inside.

Because the torque of the diesel engine is greater, the cylinder bore and stroke are larger than that of the gasoline engine, and the cylinder capacity is large, and the diesel is burned.

More intense. In addition, the diesel engine uses compression to increase internal energy to make the diesel combustion (deflagration), so that the engine can work.

, while a gasoline engine is ignited with a spark plug to make the engine work. So the diesel engine is louder than the gasoline engine.

unmuffled).

It's useless to say. In just a few words, the compression ratio is more explosive!!

1.Insufficient oil supply The amount of oil in the cylinder is small, the heat generated by combustion is reduced, which cannot meet the needs of the engine load, resulting in engine weakness, making the combustion insufficient and emitting black smoke.

2.Poor spray quality When the diesel engine is working, the injector spray quality is poor, resulting in a small surface area of fuel injected into the cylinder, a reduced binding rate with oxygen, and less heat emitted.

3.Too little air intake The engine is not fully charged, resulting in the carbon atoms in the fuel not being able to react adequately with the oxygen atoms, so the heat released is reduced.

4.Effect of ambient temperature: If the temperature is too high, it will cause the engine to overheat, which will affect the inflation capacity of the engine and make the engine power.

If it is sudden, it should be due to a lack of oil. The problem is that the noise comes from the diesel engine. If it's coming from the combustion chamber, it could be that something got into the cylinder or hit the valve. Is there a sound in the trunk?

If it is sudden, it must be due to a lack of oil. The problem is that the noise comes from the diesel engine. If it's coming from the combustion chamber, it could be that something got into the cylinder or hit the valve. Was there a sound at first?

If you use a poor-quality fuel, which causes the engine to vibrate violently and make noise, in this case, the engine noise can be reduced by replacing the fuel with better quality. If the engine is noisy due to aging and loose engine parts, this situation is generally tightened or adjusted.

Causes and solutions of high noise in automobile engines:

1. The machine foot glue is aging or loosening the machine foot glue;It is the rubber block between the engine and the frame. Its function is to reduce the vibration and cushioning of the engine when working, and to have the effect of fixing the engine. Once these feet are aged or loosened, the engine will shake, and the faster the speed, the louder the shaking will be.

Solution: Tighten or replace the rubber on the feet.

2. Improper use of engine oil;On the one hand, if the oil viscosity does not match the engine, carbon deposits will easily occur, resulting in louder engine noise. On the other hand, if the viscosity of the oil is too low, it will cause insufficient lubrication and wear of the engine parts to produce abnormal noisesIf the oil is too viscous, the engine will be overloaded and will also produce noise. Workaround:

Use the oil number on the manual and do not mix different brands of oil.

3. The engine lacks cylinders;Engine cylinder lack mainly refers to the engine has one or more cylinders are not working normally, which is manifested as: the exhaust gas flow of the car has obvious intermittent intermittentness, and the exhaust pipe shakes violently, and the engine can be clearly heard or plop, plop sound. Workaround:

It is necessary to check the operation of the individual ignition coils and cylinder spark plugs.

4. Engine carbon deposition;When there is too much carbon deposition inside the engine, the ignition energy, air intake efficiency, and mixture ratio of the car will be affected, resulting in unstable power output of the car, and the phenomenon of idle speed and acceleration will appear, and noise will also be transmitted into the cab. Solution: It is recommended to go to the 4S store to prescribe the right medicine and carry out the engine cleaning project to remove carbon deposits.

My advice is to check where the sound comes from, whether it is in the crankcase or in the valve chamber or the periphery of the engine such as generators, air conditioning pumps, etc., and at the same time, it is recommended that you do not turn on the oil light again, it is likely that the oil pressure is not enough to cause engine wear.

Should you add oil, to see the oil ruler, how can you judge it casually, oil added, will increase fuel consumption, the engine will also increase the load, the engine is also damaged, it is estimated that you hit this, the engine should not have a problem, maybe the plug of a sensor around the engine is loose, first find a professional repair shop, use the computer to detect it, to see if there is a problem with the circuit, if the circuit does not alarm **, then check the engine peripheral mechanical failure, the engine should not move easily.

Summary. Hello, I am happy to answer your car master exclusive technician to answer your car questions sincerely and sincerely for you, and find solutions and methods for you to ask questions. The engine has an abnormal sound, like the loud sound of a diesel car, this sound generally appears in two places, the first place is that the valve clearance is too large, at this time it may be that the oil is insufficient, or the oil pressure is insufficient, resulting in the valve hydraulic jacking tube can not be expanded after being compressed, at this time, the valve will appear too large a gap and there is a clicking sound, the second situation is that the gap between the piston and the cylinder liner is too large, or the cylinder liner is strained.

This condition can be examined using an endoscope, and if a strain is found just after arrival, the engine needs to be overhauled.

Abnormal engine noise, like a diesel engine clattering?

Dear, this question is up to me, it takes a little time to type, please be patient, thank you!

Hello, I have seen your inquiry, please wait for a moment and answer it for you immediately.

Hello, I am happy to answer your car master exclusive technician to answer your car questions sincerely and sincerely for you, and find solutions and methods for you to ask questions. The engine has an abnormal sound, like the loud sound of a diesel car, this sound generally appears in two places, the first place is that the valve clearance is too large, at this time it may be that the oil is insufficient, or the oil pressure is insufficient, resulting in the valve hydraulic jacking tube can not be expanded after being compressed, at this time, the valve will appear too large a gap and there is a clicking sound, the second situation is that the gap between the piston and the cylinder liner is too large, or the cylinder liner is strained. This condition can be examined using an endoscope, and if a strain is found just after arrival, the engine needs to be overhauled.

Is it possible that the oil filter is blocked?

It is possible that if the oil filter is clogged, the cold car will be loud and the hot car will not be so loud.

1.The most fundamental reason for the abnormal sound of the tappet is the low oil pressure, the aging or loosening of the foot glue and the excessive concentration of the mixture will cause the idle click, in addition, when the car starts cold, it will also idle click.

2.Aging or loosening of the foot glue: The foot rubber is the rubber block between the engine and the frame.

Its function is to reduce the vibration and cushioning of the engine when working, and to have the effect of fixing the engine. Once these feet are aged or loose, the engine will shake, and in severe cases, there will be a "click" abnormal sound, which only needs to be replaced with a new foot rubber.

3.Over-concentration of the mixture: When the engine mixture is too thick, the phenomenon is:

Acceleration is difficult after starting, the engine runs unevenly; black smoke from the exhaust pipe, a rattling sound from the engine, and sometimes a gun; Engine power decreases, fuel consumption increases. This is mostly related to carbon deposits, filter blockages, etc.

4.Cold start abnormal sound: when the car starts cold, you will hear the abnormal sound of "da-da" from the engine compartment, in fact, this "da-da" abnormal sound is caused by the oil pump has not fully established the oil pressure during the cold start, resulting in the lack of lubrication of various components.

I think you can change one, or contact the merchant to ask what the reason is and how to solve it, and recommend Shandong Changmei diesel engine.