Does too tight crankshaft pads affect engine shake? 5

After the crankshaft tile increases, there will definitely be shaking in theory, which will bring abnormal sound, in addition to relying on the thrust tile, if the thrust tile does not play any role, it is still not possible, it is recommended to take it apart to see it, and detect the gap between the crankshaft and the tile.

The engine crankshaft pad is babbitt, the main components are tin, lead, antimony, copper; Babbitt alloys can be simply divided into three types: high-tin alloys, high-lead alloys, and intermediate alloys (in which both tin and lead account for a significant proportion). Antimony and copper are used to improve alloy strength and hardness (wear resistance), and tin and lead are used as soft-phase matrices to form alloys.

The question you're asking is a bit weird, hehe, it doesn't seem to be on the side.

The tightness of the pads and crankshaft clearance is not related to engine shake. The gap between the tile and the crankshaft is 2-3 linear meters, which is greater than this data. The oil pressure drops significantly or there is a dull knocking sound.

Less than this reading the engine is prone to high temperatures and tile holding. So, it's not about jitter.

The engine has a certain amount of jitter, and if the jitter is too strong, it is abnormal, and the smaller the jitter, the better.

There are five types of engine shake increases:

1.Low-speed engines, (especially diesel).

2.Engines with a small number of cylinders (less than 4 cylinders).

3.The idle speed is too low, (the diesel engine is less than 500 rpm.) Gasoline engine below 650 rpm) 4A certain cylinder does not work, 5The engine feet are not stable.

Crankshaft pads too tight? Not only will it shake, be careful that even the bearing will be burned to you.

Engine shake can be divided into two aspects, the first is not the engine itself problem, the engine rubber pier, the transmission rubber pier damage will also cause shaking, the first engine provincial problem, 1Poor ignition, 2The oil pressure is not enough, 3

The air intake is not normal, 4Poor exhaust, 5Insufficient cylinder pressure, 6

The timing is wrong.

The car engine is shaking badly, what should I do? The real reason is this.

There are many reasons for engine shake.

If you want to judge the idea of failure, you mainly need to look at its fault phenomenon. If possible, you can read it with a decoder.

Similarly, the throttle entry is too dirty, or the fuel injector is clogged. These problems in spark cars can cause engine jolting.

It is recommended to go to a professional repair shop for a full inspection. This makes it easier to troubleshoot.

There are several reasons that affect engine shake. 1. The fuel injector is blocked or stuck and causes insufficient fuel supply and power loss. 2. The spark plug is aging, and the pole gap becomes larger and wider, which makes the ignition energy insufficient.

3. The engine intake manifold and valve produce more carbon deposits. , below is an extension of how to fix engine shake. 1. If the fuel injector is blocked or stuck, you can add high-quality fuel.

2. If the spark plug is aging, the spark plug can be replaced or cleaned. 3. If the engine intake manifold and valve are caused by carbon deposition, the throttle idle valve can be disassembled and cleaned, and the idle valve bearing can be lubricated at the same time.

Engine shake This situation may be due to the lack of cylinders leading to the bridge formwork, which is most likely caused by the failure of the ignition system. Lack of cylinder means that one cylinder of the engine does not work, which will lead to a decrease in the smooth operation of the engine and a lack of power.

The main components of the engine ignition system include the ignition coil and the spark plug.

A spark plug is a wear piece that needs to be replaced regularly, and the electrode gap of the spark plug will increase over time.

If the electrode gap becomes larger, the ignition energy of the spark plug will be reduced.

If the ignition energy is reduced, the combustible mixture in the engine will not be fully combusted, which will lead to a decrease in power and an increase in fuel consumption in the engine.

1. There is a problem with the spark plug, cylinder wire and ignition coil.

2. The fuel injector is blocked or damaged.

3. The cylinder pressure is uneven, and the vacuum tube on the inlet is leaking.

4. The slip computer detects whether the data flow of each sensor is normal.

5. The gasoline is unqualified or there is water in the fuel tank.

6. The degree of imitation of the oil stickiness is too large.

7. If there is a problem with the gasoline pump and the gasoline pressure is insufficient, measure the pressure of the gasoline pump.

8. Clean the valve of the spine of the joint, the inlet tract and the intake valve.

9. Follow the above steps to eliminate and solve the problem step by step.

1.Caused by a short circuit in the high-voltage line of the engine;

2.Caused by excessive consumption of spark plugs;

3.Abnormal water temperature leads to low viscosity and poor lubrication of the oil;

4.Carbon deposits, idle valves, throttle valves, air intake holes, these parts are prone to carbon deposits and cause engine shaking;

5.Lack of cylinders, the engine cylinder part does not work, generally because of the ignition system or fuel injection.

Causes and maintenance methods for the unstable idling speed of hot cars: 1. Check whether the throttle is dirty and blocked, and remove the carbon deposits in the throttle; Then check whether the carbon deposit in the inlet tract is too much, which will cause the cross-sectional area of the air passage to be narrowed, and the control unit can not accurately control the idle air intake, resulting in the mixture being too thick or too thin, making the combustion abnormal and causing the engine to shake. 2. In the ignition system.

1. Classification of jitter. The shaking of the engine is divided into two cases: uniform shaking and occasional shaking from time to time.

2. Shake evenly. It is the shaking of the engine, which is in a uniform state at all times. The first is that the engine speed decreases, resulting in a decrease in the frequency of jitter and an increase in the amount of jitter.

The second is that the energy of the normal shaking of the engine cannot be effectively absorbed by the foot glue, and it is highlighted, causing the engine to shake.

3. Occasional shaking from time to time. It is the engine in the idle state, irregular occasional instantaneous speed decrease, then shake. But when there is no decrease in rotation, the engine speed is normal.

I don't know when the next jitter will appear. This phenomenon is also called surge.

Reason 1: The engine lacks cylinders.

Engine cylinder lack mainly refers to the engine has one or more cylinders are not working normally, which is generally manifested as: the exhaust gas flow of the car has obvious intermittent gas, and the exhaust pipe shakes violently, and the engine shake can be clearly felt, sometimes accompanied by a sudden sound. This is mostly related to ignition coil failure.

Reason 2: The machine foot glue is aging or loose.

The foot glue 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 shakes dramatically.

The effect will be much weaker after this re-replacement of the foot glue.

Reason 3: Carbon deposition.

When the carbon deposit inside the engine is too much, the ignition energy, intake efficiency, and mixture ratio of the car will be affected, resulting in the unstable power output of the car, and the shaking phenomenon will occur at idle speed and acceleration. This is recommended to go to the 4S shop for the engine cleaning project.

Reason 4: Fuel system failure.

Adding an inappropriate fuel label (e.g., 93 to 90) will result in a decrease in the output of the car and a decrease in power; Or due to the blockage of the vent hole of the fuel tank cap, the fuel tank switch, the fuel filter and the oil pipe between the fuel tank and the carburetor are partially blocked, which cannot meet the required oil volume, resulting in the mixture being too thin and the engine shaking. It is recommended to use the fuel label specified by the manufacturer and maintain it regularly.

In the process of starting or running the engine, the main reason for the shaking is that the internal equipment has a certain failure or looseness, so it must be repaired in time, so that it will be safer and smoother to use.

Faults can result in inaccurate fuel injection and engine jolting. b. The three-way catalytic converter is blocked. The three-way catalytic converter is a device to purify the exhaust gas, and the blockage of the three-way catalytic converter will not only make the engine shake, but also cause the engine power to decrease significantly.

Engine shake cause 1: engine lack of cylinders.

Engine cylinder lack mainly refers to the existence of cylinders in the engine is not working normally, which is usually manifested as: the exhaust gas flow discharged by the car has obvious intermittent conditions, and the exhaust pipe shakes badly, and the shaking of the engine and the body can be clearly felt, which is mostly caused by the ignition coil or spark plug.

Engine shake cause 2: aging or loosening of the foot glue.

The so-called foot glue is the rubber block between the engine and the frame, which is used to reduce the vibration of the engine when working, and has the effect of fixing the engine, and once the foot glue is aged or loose, the body and the engine will become abnormal shaky, we only need to replace the foot glue again, and the effect is immediate.

Engine shake cause 3: carbon deposits.

Because there is no combustion efficiency of the engine to reach 100%, so the problem of carbon deposition can not be avoided, carbon deposition includes cylinder carbon deposition, throttle carbon deposition, spark plug carbon deposition, intake carbon deposition, etc., when the engine internal carbon deposition is too much, it will affect a series of parameters, and even lead to the instability of the car's power output, idle speed and acceleration will appear jitter, the solution is very simple, we go to the 4S shop to clean the inside of the engine.

Engine shake cause 4: fuel system failure.

The addition of an inappropriate fuel label (e.g. 95 to 92) causes severe engine shake, because the lower the oil grade, the worse the knock resistance; Or due to the blockage of the vent hole of the fuel tank cap, the fuel tank switch, the fuel filter and the oil pipe between the fuel tank and the carburetor are partially blocked, which cannot meet the required oil volume, resulting in the mixture being too thin and the engine shaking. It is recommended to go to a regular gas station to refuel, and at the same time use the fuel label specified by the manufacturer.

Master summary: The above four are the common causes of engine shaking, in fact, engine jitter is not terrible, because this situation is often caused by the aging of accessories, or improper use, we just need to check in time, do not worry too much at all.

The phenomenon of engine shaking will involve many reasons, such as excessive carbon deposition in the intake system such as throttle and idle valve, poor fuel injection atomization of the fuel injection nozzle, and poor working performance of the ignition system, which is mainly directly related to the working performance of the spark plug, high-voltage line and ignition coil

1. The lack of cylinders in the engine, the lack of cylinders in the engine mainly refers to the fact that the engine has one or more cylinders that are not working normally, which is generally manifested as: the exhaust gas flow discharged by the car has obvious intermittent intermittentness, and the exhaust pipe shakes violently, and the shaking of the engine can be clearly felt, sometimes accompanied by a sudden sound. This is mostly related to ignition coil failure.

2. Carbon deposition problems include cylinder carbon deposition, throttle carbon deposition, spark plug carbon deposition, intake carbon deposition, etc., these positions are just closely related to the power output of the engine, when the carbon deposition inside the engine is excessive, the ignition energy of the car is reduced, and the air intake efficiency decreases, which eventually leads to the engine shaking, acceleration weakness symptoms;

3. Fuel system failure, adding inappropriate fuel labels (for example, No. 93 to No. 90), resulting in a decrease in the output power of the car and a decrease in power; Or due to the blockage of the vent hole of the fuel tank cap, the fuel tank switch, the fuel filter and the oil pipe between the fuel tank and the carburetor are partially blocked, which cannot meet the required oil volume, resulting in the mixture being too thin and the engine shaking.

4. Air intake system failure, air is one of the power of the engine, if the air filter is not cleaned in time for a long time, the lack of air volume will cause the combustible mixture to be too thick, so that the engine power decreases; If it is a vehicle with a turbocharger, the failure of the supercharger will also cause the engine to shake during acceleration;

5. Cold start, when the car starts cold, the engine lubrication effect is relatively poor, the oil fluidity is poor, and it is also relatively viscous, so there will be abnormal sound of mechanical wear, as well as cold start, the coolant temperature is relatively low, the mixture is relatively thick, and insufficient combustion will cause the engine to shake and, this is generally a normal phenomenon, and it will get better after the hot car.

Causes of jitter at idle:

1.The engine has serious carbon deposits.

The most common cause of car shake is a dirty throttle or excessive carbon build-up in the fuel injector. When the carbon deposit inside the engine is too much, the gasoline sprayed out by the cold start fuel injection head will be absorbed by the carbon deposit in large quantities, resulting in the mixture of cold start being too thin, making it difficult to start, in this case, only when the gasoline absorbed by the carbon deposit is saturated, it is easy to get on the car, and the gasoline adsorbed on the carbon deposit after the car will be sucked into the cylinder by the vacuum suction of the engine for combustion, and the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, causing idle shaking after cold start.

2.Problems with the ignition system.

Check the working condition of the spark plug, high-voltage wire and ignition coil, the ignition system and spark plug are not working well, and the poor working condition of the ignition system and spark plug will also lead to this kind of failure.

3.The oil pressure is unstable.

If you have cleaned the engine deposit, washed the throttle, changed the spark plug, etc., and still found that the body shakes when idling, it is recommended to check whether the fuel supply pressure and intake pressure sensor are normal, if the oil pump supply pressure is abnormal or the intake pressure sensor value is wrong and the work is not good, the body shakes will be caused by abnormal oil pump supply pressure or wrong intake pressure sensor value and poor work.

Solution; The best way is to clean the oil circuit, clean it regularly, and use PNF fuel additives to solve the above problems caused by carbon deposits. The fuel quality is not very good or the initial fuel of the new car is stored for too long, resulting in a rapid increase in the colloidal composition of the oil circuit, which will continue to pollute the fresh fuel and cause no good fuel to participate in combustion in the later stage, and the carbon deposition exceeds the standard, which is especially common for China VI vehicles. We can only gradually alleviate most of the problems by maintaining clean oil circuits.