What is the reason for the subaru Forester 2 5t flywheel breaking and abnormal noise

There must have been a sound when the flywheel was broken.

A 2009 Subaru Forester with a mileage of about 10,000 km. The customer reflected: the vehicle occasionally has abnormal noises when driving on bumpy roads, and the sound of abnormal noises is similar to the "squeak" sound of friction between plastic parts, which is very uncomfortable.

Make an appointment for the vehicle to enter the shop for repair, and the technician accompanies the customer to conduct a road test, driving on a road surface that is similar to the conditions that are prone to abnormal noise, and listening carefully, it is found that there is indeed an abnormal noise on the lower side of the driver.

Repeated verification confirms that there are two conditions for the occurrence of abnormal noise:

1) Braking while driving on bumpy roads.

Hit the brakes hard);

2) When vigorously opening and closing the cab door.

Fault diagnosis: The technician analyzes the possible causes according to the actual situation in the maintenance

1) Loosening of chassis screws (medium probability);

2) wear of chassis components (minimum probability);

3) Resonance occurs in the front bumper (high probability).

Then, according to the idea of maintenance, the vehicle chassis is inspected step by step. The vehicle is lifted first, and the fixing screws of the chassis are retightened according to the standard torque. Then check the lower bracket, balance bar and shock absorber of the chassis, confirm that there is no abnormality, and then conduct a road test again, and the fault still exists.

Then carefully inspect the bumper, slightly tap the bumper and the headlight joint, and hear a "click" sound, is there damage inside? When I removed the bumper, I found that the bumper and the front lamp fixing bracket were loose, and if I looked closely at the fixing bracket, it seemed that the wear was very serious. Try replacing it with a new fixing bracket.

After receiving a new fixed bracket, replace it, and the abnormal noise disappears after repeated road tests, and troubleshooting.

Fault summary: Through the test run of simulated fault conditions, the fault point of abnormal noise is carefully analyzed, and the possible fault is gradually eliminated from easy to difficult in the process of inspection and judgment. Only by accumulating experience for each failure can we improve our ability to judge faults.

Hello! Glad for your question.

Loose chassis generally occurs in older cars, when the car is driving in bad road conditions, the steering wheel will feel unstable, the bottom of the car will also come out of the abnormal sound, usually the old driver can feel the overall a little loose, when encountering such a situation, it means that the chassis may be loose, and the reasons for this situation are divided into several, only by understanding the reasons, can we better prevent this problem from happening.

The first reason is the aging of rubber parts, we all know that the elasticity of rubber is particularly good, which can buffer the friction between parts and reduce noise at the same time. However, this kind of thing has a lifespan, and it will age after a long time, and the elasticity is not as good as before, so the buffering capacity will decrease, resulting in abnormal noise in each part, so it is necessary to check these rubber parts regularly and replace them in time.

The second possibility is the reason for the shock absorber, the main role of this part is to inhibit **, when the car is driving in the dustpan section, it will have an impact with the road surface, and the shock absorber can well ensure the smoothness of the car, if the shock absorber is damaged, there will be a scoop phenomenon, so that the chassis is loose, so usually check the shock absorber, if there is a leakage to repair in time.

The third is the clearance of the parts, that is to say, the ball head may be loose, this part is like the joint of the human body, if the ball head is loose, there will be a large gap between the lever and other connected parts, if the gap is too large, when crossing some dustpan roads, the screws between the subframe and the suspension will be loose, then the chassis will become loose, so usually check these two parts. Thank you.

Summary. Hello, dear. The abnormal sound of the front wheel of the Subaru Forester 12 is generally caused by the following reasons:

1. It may be that when driving, the front wheel is pierced with a sharp object, and the object adheres to the surface of the tire, and it will make an abnormal sound when it rubs against the ground. Or if there are stones stuffed into the gaps on the surface of the tire, it will also cause the first two wheels to make abnormal noises. 2. There may be oil leakage in the permeate of the shock absorber, and serious oil leakage will affect the effect of shock absorption, so the front wheel will have abnormal noise.

Or there is a malfunction in the shock absorber on the front of the car, which can also cause the front wheel to be abnormal. 3. It may be that the hub of the front wheel is deformed, if the vehicle is often driving in a bumpy road, the impact force of the hub is relatively large, and driving on the road surface in poor condition for a long time will cause the wheel hub to deform, so the front wheel will have an abnormal sound when driving.

Subaru Forester's 12 front wheels are unusual.

Hello, dear. The abnormal sound of the front wheel of the Subaru Forester 12 is generally caused by the following reasons: 1. It may be that when driving, the front wheel is pierced with a sharp object, and the object adheres to the surface of the tire, and it will make an abnormal sound when it rubs against the ground.

Or if there are stones stuffed into the gaps on the surface of the tire, it will also cause the first two wheels to make abnormal noises. 2. There may be oil leakage in the permeate of the shock absorber, and serious oil leakage will affect the effect of shock absorption, so the front wheel will have abnormal noise. Or there is a malfunction in the shock absorber on the front of the car, which can also cause the front wheel to be abnormal.

3. It may be that the hub of the front wheel is deformed, if the vehicle is often driving in a bumpy road, the impact force of the hub is relatively large, and driving on the road surface in poor condition for a long time will cause the wheel hub to deform, so the front wheel will have an abnormal sound when driving.

When driving in the morning, there is an abnormal sound on the front wheel of the ball head! It's better to open it for a while!

Subaru Forester's 12 solutions to abnormal front wheel noise: 1. Check whether the front tire pressure is normal; 2. Check whether the rim and hub are loose, and adjust or replace them if they are loose; 3. Check whether the steering wheel is normal, disassemble the steering wheel if it is abnormal, check whether the steering knuckle is damaged, and replace it if it is damaged; 4. Detect the front wheel shock absorber, and replace it in time if the shock absorption effect is damaged; 5. Carry out dynamic positioning of the vehicle, check whether the wheels are misaligned, and adjust them in time if so.

Hello, the abnormal sound of the front wheel ball joint is caused by the following reasons: 1. Fatigue wear: The needle roller bearing of the front wheel ball joint bearing is often worn, which makes the bearing components wear unbalanced, and forms the abnormal sound of the front wheel ball joint.

2. Corrosion: Water accumulation often occurs for a long time, which will cause the front wheel ball head to be corroded, resulting in abnormal noise. 3. Defective original:

Some vehicles may be poorly assembled at the time of construction, and there may also be abnormal noise in the front wheel ball joint.

After a while, there will be no abnormal noise!

Hello, in this case, check the needle roller bearing of the front wheel ball head bearing, and the abnormal noise can be solved after replacement!

12 types of foresters, currently driving 70,000 kilometers, has always been in the huge 4S shop for maintenance, recently there was a sudden abnormal engine noise, low speed obvious, high speed disappeared. The 4S shop said that it would cost 24,000 yuan to replace the middle section of the engine. I'll go!

As the true fever and trembling grandson of the former Subaru, this is also too sad, is this to subvert my impression of Subaru? Seeking Advice: Is this problem common?

Is there any other solution besides changing the middle section? 12 Forester ( Price |The current mileage is 70,000 kilometers, and it has always been maintained in a huge 4S shop. The 4S shop said that it would cost 24,000 yuan to replace the middle section of the engine.

I'll go! As a true enthusiast of Subaru, this is also too sad, is this to subvert my impression of Subaru? Seek advice from the masters:

Is this problem widespread? Is there any other solution besides changing the middle section? My 13 Subaru Forester, now the speed is less than 1000 rpm, and it is not obvious if it is above 1000 rpm, what should I do?

Engine noise can be roughly divided into engine noise during cold start, engine noise during rapid acceleration, and engine noise at idle. 1. Abnormal noise caused by aging or loosening of the machine foot pad. The foot pad, also known as the chicken paw pad and the tripod, is generally installed in the middle of the engine and the body, connecting the body and the engine, and playing the role of fixing the engine.

And its most important role is to play the effect of cushioning and shock absorption. Once the foot pads are old or loose, the engine shakes dramatically, from Thank you! I have been maintaining it for 4s, and the oil lamp has never been lit, but there was indeed a shortage of oil, which was found when the battery was replaced, and then it began to make abnormal noises, and there was no problem before, is this to subvert my impression of Japanese cars?

There are many, many causes of abnormal noise, and it is necessary to clarify what exactly causes it. I caused the tile because of the lack of engine oil, and it was expensive to replace the middle cylinder and other accessories, and the 4S shop was more expensive. If it is indeed an engine failure, it is recommended to consider the engine assembly of the dismantling of the car, there are many sources, and you can find a reliable source of goods patiently, and you can get it with about 1w.

The Forester engine is a horizontally opposed engine, and the oil lubrication is not good by nature, which is inferior to the vertical cylinders and the cylinders with a V-shaped angle. Therefore, it is easy to break the piston ring and get stuck on the cylinder wall, resulting in abnormal piston operation.

Last year, I watched the "Autohome" report that the Forester horizontally opposed engine, a part on the piston fell, first stuck on the cylinder wall, stuck the piston, did not let the piston run, and then the piston connecting rod was pulled off the piston by the crankshaft, the connecting rod was pounded in the cylinder, and finally the cylinder wall was smashed accident. This accident did not occur in a day, from the discovery of the anomaly to the final failure of the engine.

One or two weeks.

The Toyota 86 also used the same engine, and there was also an accident with a blown shaft.

Eventually, an experienced engineer discovered that the root of the problem was the wrong oil. 4S shop recommends using 0w--20 engine oil. This oil is completely fine when driving smoothly, accelerating slowly, and playing slowly.

But the problem is that there are a few people who drive the forester and 86, who drive honestly, and they are all masters who step on the accelerator vigorously and brake violently, and the oil lubrication of 20 is not enough. 40's suitability.

If your car has an abnormal noise, it is recommended not to start the car, find a flatbed trailer, and "carry" the car to the 4S shop for inspection.

1. The engine has abnormal noise.

Symptom description: There is a lot of abnormal noise in the engine compartment, and most people also judge it to be the abnormal noise of the engine compartment by the sound**, which is usually a metal screeching sound or a howling sound.

Solution: The abnormal engine noise indicates that the technical status of a certain mechanism of the engine has changed. It is mainly caused by excessive wear and tear of some parts or improper assembly and adjustment.

Some abnormal noises can still predict that the engine will be damaged accidentally, so when the engine has abnormal noise, it should be repaired in time to prevent the fault from expanding.

It should be reminded that if it is an abnormal noise in the engine, most of the owners will not be able to solve it by themselves, and it is best to send it to the factory for maintenance.

2. There is abnormal noise in the gearbox.

Symptom description: If there is a "rustle" sound inside the gearbox while the car is driving, and there is no more after pressing the clutch or accelerator, there will be a whistle-like sound when changing gears.

Solution: There are many transmission parts, and the reasons for the sound are more complex, so we should pay attention to whether it is related to a specific speed, such as some planetary teeth that sound at about 50km h.

Whether it is related to certain gears, which is very important for judging the failure of the transmission, if a certain gear sounds, it must be related to the components that affect the transmission of the gear; If all gears sound, it is often a common meshing shaft failure or a lack of oil in the transmission. Whether it is related to specific actions, such as increasing and decreasing gears, starting, rapid acceleration, sharp deceleration, turning, etc., are effective means to judge abnormal noise, among them, changing speed and direction are particularly important for judging the rear axle fault.

If the abnormal noise of the transmission is obvious, it is recommended to send it to a professional repair shop to check the faulty parts, and then replace them.

3. There is abnormal sound of wear.

Symptom description: When driving on the accelerator or brake, there is always some abnormal noise in a certain part of the body, the sound is not loud, and it does not affect normal driving, but it always makes people worry a little about the failure of the body.

Solution: The abnormal noise of the door is mainly caused by the lack of lubrication, but it is necessary to judge whether it is the position of the door hinge or the glass regulator, door lock mechanism, handle mechanism, etc. inside the door. In the case of door hinges or limiters, special door hinges and slide grease can be used, while special door attachment grease is used for lubrication of glass regulators, door locking mechanisms, handle mechanisms, etc. inside the door. In terms of brand selection, try to choose the commonly used brands in 4S stores, such as German Marty, Kluber, Tiger Head Hotolube, Fox, etc.

It is not advisable to use engine oil or ordinary butter, it will freeze in winter, and the harmful smell will affect your health.

Hello, the current number of people consulted may not reply in a timely manner, if it is a vehicle failure problem, it is recommended to use the computer to detect the specific cause of the failure, search for "car master" can be consulted at any time to ask the car to ask the question, 24 hours ** answer.