What is the squeak of the diesel engine with load

The first thing to know is what the sound is. It is recommended that you go to the repair shop for inspection. The general sound is in three ways.

The first is the abnormal noise caused by the engine belt, overtightness, aging, etc.

Second, check whether the diesel engine turbocharger, air intake pipe and other components are damaged, and its failure rate is high.

The third is the wear of moving parts inside the engine.

The fourth is to check the gearbox.

In general, when the car starts cold, the engine sound will be slightly louder than when the car is hot, as long as the sound sounds uniform and soft, not harsh, there is generally no problem. This is due to the fact that the gap between the cylinder wall and the piston is not yet optimally sized during cold driving, and the lubrication of the oil is not sufficient. Usually when the engine block temperature reaches about 95 degrees, the sound will return to normal.

The reason for the engine oil, the inferior oil or the oil has not been changed for a long time, the lack of engine oil, etc., can easily lead to increased friction between the valve and the guide and the hydraulic tappet, etc., so that the various sounds in the engine are louder.

Precautions for diesel engines.

1. Check whether the water tank is full of water, and check whether the antifreeze is full in winter; whether the oil is at the specified oil level; Whether the diesel tank has sufficient diesel.

2. Check whether the wiring of the electric starting system circuit is normal and firm, whether the liquid level height of the battery is normal, and whether it is kept between 24V and 26V.

3. Check whether the transformer switch in the high-voltage power room has been disconnected, and whether the mains incoming switch in the low-voltage distribution room has been disconnected.

4. Check whether the incoming switch of the generator in the low-voltage electric room and all the shunt loads powered by the generator are in the disconnected position.

There is a clattering sound in the engine, which may be caused by the following reasons:

1. Abnormal noise of engine belts, such as generator belts, air conditioning belts, steering pump belts, etc., may be too loose or too tight, or it may be that the belt is aging, adjust the tightness of the belt, apply butter to the belt, or replace the belt.

2. The engine lacks cylinders, a cylinder does not work, the engine will be unbalanced and produce abnormal noise, and it is also accompanied by the violent shaking of the engine, insufficient power and other faults, which may be the fault of the ignition module, spark plug and fuel injector, and the corresponding accessories can be replaced.

3. Engine "tempering" failure. When the car slows down and collects the oil, there is a "poof" sound, which may be the engine "tempering" failure, which is usually called the engine "fire", too much carbon deposition on the valve or the wrong timing of the valve will produce abnormal noise, cleaning the carbon deposit on the valve or adjusting the timing of the valve.

1. Abnormal sound at the top of the piston:

The foreign object enters the cylinder and hits the top of the piston.

The connecting rod pad is badly worn or damaged, striking the cylinder head.

The valve phase is incorrect, causing the piston to collide with the valve.

2. The knocking of the valve stem end by the oversized intervalve gland and rocker arm produces a knocking sound 3, the tightening force of the cylinder head nut is uneven, the cylinder head or cylinder gasket is deformed and produces an abnormal sound, and the piston or connecting rod deformation causes the cylinder to make an abnormal sound.

5. The diesel engine is overloaded for too long or the bearing temperature is too high, which makes the small tile corrosion and the wear of the journal serious: the glands between the bearing and the journal are too large or the bolts of the bearing cover are loose, resulting in abnormal noise.

6. The piston pin and connecting rod bushing are seriously worn, the gap is too large, the piston pin and pin seat hole are worn loosely, the oil pressure is too low, or the piston pin is seriously ablated due to poor lubrication.

7. The crank bearing and the journal are seriously worn, the radial direction is too wide or the tightening torque of the straight screw of the bearing is insufficient, and the crankshaft jumps up and down after being stressed.

8. When the backlash of the gear chamber exceeds the specified value, a strong abnormal sound is generated.

9. The flywheel screw is loose and produces strong shaking, resulting in abnormal sound of the flywheel shellHope this helps,!!

The multi-cylinder squeaks by hand turning.

Summary. Hello, master, in this case, you can first check whether the peripheral belt and pulley of the engine are normal, and if you rule out the method, you can remove the peripheral belt of the engine to start the vehicle to see if the sound still exists. If the sound is still there, you need to check the exhaust pipe, unplug the exhaust pipe and test it.

What's going on with the rattling of the diesel engine.

Hello, master, in this case, you can first check whether the peripheral belt and pulley of the engine are normal, and if you rule out the method, you can remove the peripheral belt of the engine to start the vehicle to see if the sound still exists. If the sound is still there, you need to check the exhaust pipe, unplug the exhaust pipe and test it.

Is it related to the cylinder barrel piston.

Is it a valve problem.

If it is said that the sound disappears after the exhaust pipe is removed, it has a lot to do with He Hesai and the piston ring, and the main reason is that the engine is too heavy to be discarded.

Hello, this situation is generally due to the decline in the quality of the dry oil, poor lubrication, there will be a lot of noise, you need to check whether the oil level is normal, if it is too low, you need to replenish it in time, if the color turns black, you need to change the oil in time, increase the oil pressure, increase lubrication, reduce noise, timely maintenance to ensure that the car is stable, comfortable and safe, thank you.

The sound of the diesel engine is buried and humming, hello! The muffled humming of the engine is likely to be related to the vehicle's air intake system, and if the air intake system is clogged or aging, it needs to be dealt with in time, such as the air filter has been used for a long time, and there will be a lot of particles. The sound of the engine is muffled and humming, which may also be due to the use of engine oil that does not meet the label, such as the suitable one should be selected when choosing the engine oil when making a car, and the label should not be too high.

The three-way catalytic converter of the vehicle has the problem of blockage, and it is easy to cause the engine sound to be muffled, as well as the situation of buzzing, you can check the three-way catalytic converter, if there is a blockage problem, it can be cleaned or replaced. Hope it helps!