What is the cause of suspension squeak and how to deal with it

1. The relationship between abnormal noise and engine speed.

The presence of most common squeaks and squeaks in an engine depends on the state of the engine's rpm.

1. Abnormal noise only exists when it is running at idle speed or low speed. The reasons for the sound are: the gap between the piston and the cylinder wall is too large; The piston pin assembly is too tight or the connecting rod bearing is assembled too tightly; The gap between the tappet and its guide hole is too large; The profile of the valve cam is worn; Sometimes, the starter grip comes loose and the pulley makes a sound (noticeable when the speed changes).

2. The sound is disordered when maintaining a certain speed, and a short sound is made successively when decelerating sharply. The reasons for the sound are: the camshaft timing gear is cracked or its fixing nut is loose; crankshaft breakage; The piston pin bushing is loose; The axial clearance of the camshaft is too large or its bushing is loose.

3. The abnormal sound occurs when the engine accelerates sharply, and the sound still exists when maintaining high-speed operation. The reasons for the sound are: the connecting rod bearing is loose, the bearing is burned or the size does not match and rotates; loose crankshaft bearing or bearing burning capacity; The piston pin is broken; crankshaft breakage;

Second, the relationship between abnormal noise and load.

There is an obvious relationship between a lot of abnormal noise on the engine and its load, and the method of relieving the load can be taken cylinder-by-cylinder during diagnosis, and the load of one or two cylinders is usually relieved by the single-cylinder or double-cylinder fire breaking method to identify the relationship between the abnormal noise and the load.

1. A cylinder is fired, and the abnormal noise is absent or reduced. The reasons for the sound are: piston knocking on the cylinder; Loose connecting rod bearings; piston ring leakage; The piston pin is broken;

2. If a cylinder is fired, the sound will be aggravated, or there will be no sound at this time. The reasons for the sound are: the piston pin copper sleeve is loose; The piston skirt cone is too large; piston pin out; The connecting rod bearing cover fixing bolt is too loose or even the connecting rod bearing alloy is burned and melted off; The flywheel retaining bolts are too loose.

3. The abnormal sound of the adjacent two cylinders is reduced or disappeared. The reason for the sound is that the crankshaft bearing is loose.

3. The relationship between abnormal noise and temperature.

1. The sound is low temperature, and the sound is reduced or even disappeared when the temperature rises. The reasons for the sound are: the gap between the piston and the cylinder wall is too large; The piston is misaligned due to the depth and width of the main bearing oil groove; Low oil pressure and poor lubrication.

2. There is a sound after the temperature rises, and the sound decreases or disappears when the temperature decreases. The causes of the ringing are: premature ignition caused by overheating; The long and minor axes of the piston skirt oval are opposite; The piston ovality is small, and the gap between the piston and the cylinder wall is too small; piston deformation; The gaps between the piston rings are too small.

2. The causes of abnormal noise caused by the valve mechanism are: the valve clearance is too large; The gap between the tappet and its guide hole is too large; The cam profile is damaged; The gap between the valve stem and its duct is too large; Broken valve springs; radial rupture of camshaft timing gears; loose valve seat inserts; The valve jam cannot be closed.

Social and economic development is getting faster and faster, there are more and more cars on the road, the car is convenient for our life at the same time, it will also cause us a very huge trouble, if the car has a front and rear suspension noise is a very dangerous thing, must be repaired in timeThere are three main reasons for the abnormal noise of front and rear suspension.

The first point is that the gap between the ball head and the ball head seat becomes too wide and too loose. If we want to solve this problem, then we can only go to a professional 4S shop or repair shop for repair, only in this way can we better solve our problems.

The second reason for the abnormal suspension noise, that is, the vehicle may be driving on a bad road in daily life, and the owner should not maintain the shock absorber oil leakage caused by the suspension abnormality, at this time, if the severity of the damage is repaired or replaced, we all know that if the car is driving on a bad road, then it will have a very serious impact on the car floor and the suspension system of the brake system, so we should try to choose some smooth road sections that are easy to walk. If we try to walk as little as possible on the road section that is too potholed, we can better maintain the life of our vehicles.

The reason for the abnormal suspension noise is that the universal joint clearance is too large or caused by the hairpin, the main reason is that the lubrication device or maintenance is not timely, so this problem will occur, the above three reasons are the main reasons for the suspension abnormality, we must pay attention to reasonable driving in daily life, especially for some rugged road sections, we should try to slow down as much as possible, so as not to affect our shock absorbers, I hope everyone can know this, and at the same time after the car fails, We should also go to the repair shop in time for repair, and we must not disassemble it ourselves, which is a very dangerous thing.

I know that it is likely that it is due to the slow speed of driving, or it is also possible that the wheel alignment of this car is not particularly stable, or it may be because the tires are more worn.

It should be that the screws are not fixed or the size does not match, so it will cause a lot of abnormal noises and very noisy sounds.

It may be that the positioning of the 4 wheels is not very accurate, and the tires may have some wear and tear.

Because the abnormal noise of the front and rear suspension of the car is very annoying, and it will affect the normal driving, it should go to the 4S shop for repair as soon as possible.

It must be because there are some problems with the parts of the car, so there will be a big noise, this time you should check it, and then also change the brake plate, so that you may get a quick solution.

You can pour some lubricating oil, you can also change a lifter, and it is best to go to the 4S shop for a professional inspection.

The chassis is a very important part of the car, its biggest role is to support the entire body, and then install the engine and many other parts, and then transmit the power to the wheels, so that the vehicle can run. At present, the chassis of many cars adopts independent suspension, and there are two types of non-independent suspension. If there is an unknown abnormal sound in the front and rear suspension of my car, then I will go to the 4S shop in time to find a professional master to check and repair, after all, the abnormal noise of the front and rear suspension of the car is not a small problem, and it must be dealt with in time.

There is an anomaly in the front and rear suspension of the car, which should be checked and repaired in timeIf there is an anomaly in the front and rear suspension of our car, it is possible that the parts of the chassis are loose, and if they are loose for a long time, they will fall off. In addition, the air pressure of the tires is insufficient, which will also produce abnormal noises, and the assembly of the chassis parts of the car is unreasonable or because the strength of the assembly is not the same, and the lack of assembled parts will produce abnormal noises. These conditions will not only affect the normal driving, but also may cause hidden dangers to our safety, so we should go to the regular 4S shop in time to repair, let the professional master to check, do not go to some small repair shops by yourself.

Because many informal shop masters are not particularly professional, it may make you lose a lot of money, and even repair your car more and more problems. <>

The cause of abnormal noises in the front and rear suspension of the carIf the front and rear suspension of the car makes abnormal noise, if it is because of the air pressure of the wheels or poor lubrication and damage, then we can inflate the car tires to normal air pressure, and then apply lubricating oil or replace the damaged suspension control squash balls. If the shock absorber is damaged or the spring of the stabilizer bar is weakened, the connecting rod is damaged, etc., then we can replace the shock absorber in time, and then replace the stabilizer bar and the connecting rod together, if the side tie rod and cantilever control arm are seriously worn, then they should also be replaced. If the deformation of the drive shaft and the wear of the universal joint are severe, noise will occur, and the drive shaft and universal joint need to be replaced.

If there is an abnormal sound under the front and rear suspension of the car, no matter which part is worn or loose, we must replace and repair it in time. In the maintenance of the car, we must do it regularly, after all, the car is a means of transportation will often be used, and it is also very dangerous when walking on the highway, small problems are not repaired can easily cause big problems, I hope you must pay attention to it.

I would drive the car directly to the repair shop, tell the masters about the problems with my car, and then ask them to check what the problem is, find out the problem and deal with it.

After this problem occurs, I will drive the car directly to the 4S shop, and then find the help of professional workers, and then carry out repairs and overhauls, and then I can also apply for insurance directly.

If this happens to the car, then I will find a professional to help me repair it, because I can't solve this problem by myself, so I will definitely go to a professional repair shop to repair it.

I would go to the garage for repairs because I didn't know the cause of the noise and I couldn't fix the car myself.

The suspension system is constantly running while the vehicle is moving, so the shock absorbers and the rubber bushings between the various connecting rods wear out during operation. When these sleeves age or fall off, there is an unusual metal crashing sound. In addition, if the shock absorber is broken, it will make a "pop" or "click" sound on bumpy roads.

Therefore, if there is such noise, we need to find a professional master to replace the corresponding parts. Depending on the noise performance, we can determine which part of the problem is. The following are the specific methods of judgment and possible reasons:

1.Abnormal noises only occur at idle or low spins. The reasons for the appearance of this sound may be:

The gap between the piston and the cylinder wall is too large, the piston installation configuration is too tight or the connecting rod bearing installation configuration is too tight, the gap between the tappet and the guide hole is too large, and the valve cam profile is worn; There are also some cases, such as the starting gear is loose and the pulley rings (noticeable when shifting). 2.When maintaining a certain speed, the sound is disordered, and when it slows down sharply, it emits a short sound in succession.

This sound can be caused by cracking of the camshaft timing gear or a loose set nut of its retaining nut, a broken crankshaft, a loose piston bushing, excessive axial clearance of the camshaft, or a loose bushing. 3.The abnormal noise occurs when the engine accelerates rapidly, and the abnormal noise still exists when the engine rotates at high speed.

This sound may be caused by loose connecting rod bearings, burned out bearings or mismatched dimensions, loose crankshaft bearings or burned pads, broken piston pins, or broken crankshafts. When there is a suspicion that there is an abnormal sound in the suspension system, we can judge it by following the following steps: 1

First, check if the tire pressure is appropriate. If the tire pressure is too high, it will also cause a squeak sound. 2.

Check the joint for abnormal damage, loose nuts, etc. If there is any loosening of the connection between the suspension system and the upper and lower ends of the vehicle, it will cause abnormal noise. 3.

Check whether the self-locking nut on the upper part of the piston connecting rod is tightened, and whether the bolt nut connected at the lower end is tightened. Any loosening of the connection may cause an abnormal noise. 4.

Check the strut and its components for damage, such as vibration isolation blocks, buffers, spring pads or pressure bearings. 5.Check the shock absorber, press the shock absorber with your hand, and listen for any abnormal sounds.

What is the cause of the abnormal sound of the front suspension of the car? What is the cause of the abnormal sound of the front suspension of the car? The causes of abnormal noise in the front suspension of the car may be as follows:

1. It may be caused by the gap between the ball head and the ball head seat becoming larger and loose, because the ball head seat is a sealed structure and is not removable, so it can only be replaced at the maintenance station; 2. It may be that the vehicle is usually driven on bad roads and is not properly maintained, resulting in oil leakage and damage to the shock absorber, which needs to be dealt with at the maintenance station, which depends on the severity of the damage and is repaired or replaced; 3. It may be caused by the excessive clearance of the universal joint or the issuance of cards, the main reason is that there is no lubrication device or the maintenance is not timely, in this case, you should go to the maintenance station to apply grease or repair. @2019

A semi-independent suspension system that connects two wheels through a torsion beam that can generate torque, that is, the scooter suspension that we often call a scooter suspension is generally characterized by cheapness, simple structure, small space occupation, and strong leather. The use of steel plate discs is used as an elastic element of an independent suspension. This doubles as a guiding mechanism and greatly simplifies the suspension system.

This suspension is widely used in some hard-core off-road vehicles, and this suspension can be seen as a variant of the suspension, consisting of two independent connecting rods instead of the lower swing arms, and the laterally stabilized support bars. Because the two connecting rods look thinner, it is commonly known as chopstick hanging. Relatively easy to check.

Turning in place to a magnetic joint, in addition to the sound of the tires and the ground, is most likely a lever ball joint or gimbal problem.

The old Highlander used this suspension for the rear wheels, which was simpler in structure, less costly and more comfortable than multi-link suspensions, but inferior to multi-links in terms of load-bearing capacity and torsional resistance. The front popularized several types and structures of chassis suspension. This is to quickly locate and solve the problem according to the knowledge learned when the chassis is abnormal or vibrates too much in the actual vehicle use.

The powertrain is mounted on the chassis through the engine and gearbox feet, and the rubber parts in the feet lose their damping effect as they age over time, so the engine and gearbox feet are one of the key items we investigated. The best inspection is caused by an empty filter suit turned upside down and not installed in place. Through bumpy or undulating roads, the vibrations transmitted to the seats can be clearly felt to become larger and last longer.

Generator belts will lengthen and deteriorate with the increase of mileage, and if the belt length exceeds the limit position of the tension wheel, the belt will loosen, and the engine will be abnormal noise and irregular jitter when running. So the belt is also one of the items we focus on. Acceleration or deceleration is accompanied by irregular steering and juddering, which may be caused by loose belts when exiting the engine compartment.

The engine intake part is blocked or leaking, and the normal combustion in the combustion chamber cannot be well guaranteed during the engine working process, and joints and jitter will follow. The acceleration is not smooth, the accelerator is weak, and the joints resemble the sound of a running train. Find out the cause of the leak or blockage and recover from it.

The previous friend found that the accelerator was weak after the rearmament, and he would hear the sound of chaos when he jumped up.

This is because the liquid outflow of the damper does not function properly to support and eliminate vibrations. Cancer at the bottom end is the main connecting part of the suspension, and it bears a lot of force during work. Most of the ball joints have rubber or oil rods, and over time, too much of the joint can be used, resulting in squeak and damage.

The front wheel bearing is one of the core bearings that supports the weight of the wheel and the body, and if it exceeds the capacity of the external force or the lubrication is poor, it is easy to be damaged, and the internal volume will increase. The louder the squeak and vibration, the more directional the sound is emitted in situ, which may also be a problem with the front wheel bearings. Abnormal sounds in the steering system often occur in places such as the ball head of the steering rod and the all-round section of the steering column.