Ask for help from the 2014 Malibu 2 0 After starting, the engine continues to make abnormal noises,

Clause. 1. After the car is parked for a long time, the oil in the engine flows back into the oil pan at the bottom of the engine. Therefore, when the engine is started after a long period of inactivity (e.g. overnight), the upper part of the engine is in a state of lack of oil and lubrication.

It takes about 30 seconds after the start of the oil pump to deliver the oil to the pistons, connecting rods and crankshafts of the engine, which need to be lubricated the most. Clause.

Second, before the engine reaches the working temperature (about 90-110 degrees Celsius), its fuel supply system is still low, and it cannot effectively vaporize the gasoline completely (I believe everyone knows that the liquid temperature rises to the boiling point and gases). In gasoline has not yet been vaporized"；Wet"；When it is liquid, it is not easy to burn and start the engine. The gearbox gear oil flows to the lower half of the gearbox when the transmission is cold, and only when the car is driven will the bottom gear oil be brought up to lubricate the upper half due to the operation of the gear.

Clause. 3. The normal working temperature of the engine is about 90 110 degrees Celsius, before the working temperature is reached, due to the low temperature of the oil supply system, it is impossible to effectively vaporize the gasoline completely, and in this state, it is not easy to burn and start the engine. At this time, the engine will rely on the action of the choke to prevent part of the air from entering the cylinder, increase the gasoline-air mixing ratio and increase the engine speed to maintain the engine from stalling. When the normal working temperature is reached, the automatic choke returns to its normal state with the action of the machine.

Clause. Fourth, after a night of static setting of the engine, the lubricating oil on each friction surface has basically disappeared, and the oil film protection has been lost; The low temperature increases the viscosity of the lubricant, resulting in poor adhesion and flowability, which increases the resistance of the engine when it starts.

Hello, this go into the store for maintenance, if my answer is helpful to you, please set it to.

The abnormal noise made when the vehicle starts is usually a suspension system failure. It may be caused by a loose or damaged engine crack.

The abnormal noise emitted by the vehicle when steering may be a malfunction of the steering system and suspension system. Due to the steering process of the vehicle, the tilt of the vehicle deforms the suspension system, resulting in abnormal noise.

The abnormal noise emitted by the vehicle when driving in good road conditions and wide rental can be carried out indiscriminately, which is a fault of the braking system components. It can be caused by loose brake system components, worn out, brake drum loss or uneven brake disc plane.

Hello, the car butler team has you covered.

This sound is mainly caused by friction and percussion, which may be caused by insufficient lubrication when the first cool car lands, and when the vehicle lubrication system works normally, the hail and oil pressure are successfully established to reach normal.

The sound will disappear or be reduced, which is more pronounced in colder weather adaptations. In fact, this is also the case in other models, especially when the oil grade is lower, the maintenance time is fast, and the oil is used for a long time.

for obvious. From this point of view, you can try again after changing the oil, whether the phenomenon will be reduced, objectively speaking, it is not a big problem, the above suggestions are for your reference only.

Summary. Hello dear: <>

The reasons for the abnormal sound of Malibu engine acceleration are as follows: 1. The abnormal noise caused by the rough operation of the engine, accompanied by the difficulty of starting, the engine is not running smoothly after fire, and the cooling water consumption is fast, which is caused by the fuel injection time too early, and the oil supply advance angle should be readjusted. 2. The exhaust pipe is accompanied by the continuous discharge sound of PAO at the same time when exhausting, the exhaust pipe is overheated, and it is difficult to start, this abnormal sound is caused by the late injection time, and the oil supply advance angle should be adjusted in time.

<> Malibu engine accelerates violently and there is an abnormal sound.

Hello, <>

The reasons for the abnormal sound of Malibu engine acceleration are as follows: 1. The abnormal noise caused by the rough operation of the engine, accompanied by the difficulty of starting, the engine is not running smoothly after fire, and the cooling water consumption is fast, which is caused by the fuel injection time too early, and the oil supply advance angle should be readjusted. 2. The exhaust pipe is accompanied by the continuous discharge sound of PAO at the same time when exhausting, the exhaust pipe is overheated, and it is difficult to start, this abnormal sound is caused by the late injection time, and the oil supply advance angle should be adjusted in time.

Happy Tong cavity] [open and prepare for the heart] <>

Extended information: engine RI maintenance should pay attention to: 1. Keep the crankcase well ventilated, most gasoline engines are equipped with PCV valves, but the pollutants in the blow-by gas will be deposited around the PCV valve cavity, which may block the valve, and the pollutants around the PCV valve should be removed regularly; 2. Regularly replace the engine oil and filter element, and make the oil reserve of Wuyan moderate; 3. Clean the crankcase regularly; 4. Use lubricating oil of appropriate quality grade.

Summary. Hello oh dear, the reasons for the abnormal sound of the 12-year-old Malibu exhaust pipe are as follows:1

Leaks in the connection of the exhaust pipe: Check whether the junction between the exhaust pipe and the engine, the middle section, and the muffler is loose or cracked, which will cause the exhaust pipe to make abnormal noises. 2.

Loose exhaust pipe: Check whether the fixed point of the exhaust pipe is firm, if it is loose, there will be a collision of the horn part of the exhaust pipe to produce sound, which will cause the exhaust pipe to dissipate vibration and cause abnormal noise. 3.

Exhaust pipe wear: The exhaust pipe is a key component of the exhaust pipe and is usually the main component that affects the exhaust noise. When the exhaust pipe is worn or aged, it is prone to abnormal noise.

4.Problems with the position of the connection between the exhaust pipe and the middle section muffler: Check the connection between the exhaust pipe muffler and the middle section for foreign objects or deformation with driving, resulting in abnormal noise.

<> 12 Malibu exhaust pipe abnormal noise.

It seems that the contents have been dropped, and it is cost-effective to repair.

And the smell of gasoline is relatively strong.

Hello oh dear, the reasons for the abnormal trachea of the 12-year-old Malibu row shed are as follows: 1There is a leak in the connection of the exhaust pipe:

Check whether the joints between the exhaust pipe and the engine, the middle section, and the muffler are loose or cracked, which will cause the exhaust pipe to make abnormal noises. 2.Loose exhaust pipe:

Check whether the fixing point of the exhaust pipe is firm, if it is loose, the exhaust pipe horn part will collide and produce sound, which will cause the exhaust pipe to scatter vibration and cause abnormal noise. 3.Exhaust pipe wear:

The exhaust pipe is a key component of the exhaust pipe and is usually the main component that affects the exhaust noise. When the exhaust pipe is worn or aged, it is prone to abnormal noise. 4.

Problems with the position of the connection between the exhaust pipe and the middle section muffler: Check the connection between the exhaust pipe muffler and the middle section for foreign objects or deformation with driving, resulting in abnormal noise. <>

<> dear, I've kept you waiting, your car is 11 years old, has the exhaust pipe been replaced? <>

<> changed. Dear, how many years have you had the exhaust pipe replaced. <>

<> 2 years. It has been 140,000 kilometers, the oil is seriously burned, dear, the exhaust pipe that has been replaced for two years can not be called aging, and you have a problem with the muffler belonging to the exhaust pipe and the connection between the middle section. <>

Smiling gesture hand spring].

I want to make do with it for another two years.

Dear, in the case of serious oil burning, it is not recommended to overhaul the engine. Not cost-effective. <>

<> kissed and defeated his brother, because of the attack on Chachai, it can't be sold too high for this second-hand car, and it costs a lot of money to overhaul the engine, which is not cost-effective. <>

New Malibu XL engine abnormal noise treatment method: 1. If the engine makes a puff abnormal sound, it means that the engine valve has too much carbon deposit, and the valve is blocked, and the engine valve can be cleaned; 2. If there is a squeaky noise, it means that the engine belt is loose, adjust the engine belt, if the belt is not elastic, replace it with a new one, so that there will be no abnormal sound; 3. If it is a clanging sound, it means that the screws that stabilize the engine are loose, and it is enough to tighten the screws; 4. The abnormal sound of clanging may also be due to the aging of the claw pad, which is also a part of the stable engine, at this time, it is necessary to replace a claw pad to start the buffer machine so that there will be no abnormal sound.