When the car starts cold, it makes a clicking sound, what s going on?

The abnormal clicking sound when the cold car starts, this situation is more common in more mileage or older modelsPoor unidirectional tooth return of the starter motor and friction with the edge of the flywheel tooth will produce a very harsh sound.

If this sound occurs at the moment of starting, the starting motor can generally be removed for maintenance, the dust and dirt inside can be removed, and the gear mechanism can be refilled with grease, such as carbon brushes.

There is no abnormality, and the fault can be solved after the maintenance of the starting motor.

In addition, the chain tensioner in the engine works abnormally, which may also cause abnormal noise at the moment of cold start, so it is best to let the master actually check it for better analysis.

The reason why there is an abnormal noise when the car starts.

1. The engine temperature is too low.

The car is in a cold start.

, the engine temperature is too low to make it work properly, and it is normal to have some abnormal noises at this time. This is normal, just wait a while for the engine temperature to rise to normal levels.

2. Three-way catalytic converter for automobiles.

Expansion by heat. When the car is just started, there is an abnormal sound, and it disappears after a while. This situation is caused by the thermal expansion of the three-way catalytic converter of the car, which is also a normal phenomenon and should not be ignored.

3. Gearbox failure.

One of the causes of abnormal starting noises in a car includes a malfunction of the gearbox, which causes its internal gears to be rubbed against each other. This situation is more complicated, and you need to go to the repair shop or 4S shop.

Get a professional to check it out.

4. an engine belt.

or chain wear.

If the engine belt or chain is worn, it will also cause friction during start-up or abnormal noise due to idling, in which case it is best to replace the engine belt or chain directly for safety.

This is the variable valve timing system of the vehicle, the oil valve can not seal the oil, which leads to the fact that during the cold start, there is no oil pressure in the camshaft, and the variable timing system can not fix the camshaft position, so the camshaft has fluttering, resulting in the sound of hitting the valve ejector rod, and the variable valve oil valve can be replaced, and the specific operation steps are as follows:

1. Press the sensor plug clip.

2. Unplug the sensor.

3. Remove the sensor fixing screws.

4. Remove the sensor.

5. Install the new sensor and you're done.

It is the "clutch" that is too dirty (greasy), that is to say, the rear oil seal of the engine or the transmission oil seal has oil leakage, leaking to the clutch plate, the weather is too cool (greasy) will "stick" the clutch plate to make it in a semi-linked state, the "card, card" sound is caused by the uneven separation claw, when the temperature rises after a period of operation, the viscous oil becomes thinner, the clutch separation is normal, so the abnormal sound disappears.

When the electronically controlled gasoline injection engine is normal, regardless of whether it is cold or hot, there is no need to step on the accelerator plate and the traditional refueling action (repeatedly press the accelerator pedal) is used when starting, and the starter can be started smoothly. However, sometimes there will be failures that are difficult to start, or even cannot start. Some of the problems lie in the ignition system, some in the fuel system or control system, and some in mechanical failure.

After the occurrence of a difficult to start fault, the approximate location of the fault can be determined by the following methods. - Observe the fault warning light of the engine electronic control system, if there is an alarm, the electronic control system is faulty, the fault code should be called up and the fault should be eliminated according to its instructions. The main components that affect the starting performance are:

Crankshaft position sensors, coolant temperature sensors, air flow sensors, etc. When checking for faults, pay attention to the circuit conduction of sensor circuits and connectors. - Look for the gasoline gauge or the fuel level warning light.

a. There is a clicking sound within half a minute, and then there is no click, which is generally the sound of the expansion of the three-way catalytic converter after being heated, which is normal. b. There is a relatively large clicking sound in cold start, which is mostly a problem of the engine timing system, such as the timing belt chain wear, elongation, loosening or the chain tensioner loses its tensioning function. c. If it is only when the air conditioner is turned on, it may be caused by the friction of the air conditioner belt.

Check whether the timing belt is broken or has burrs.

Pay attention to whether there is a deviation in the position of the starter, or whether the belt linked to the starter is aging and curling.

Check the idle motor.

It's best to determine if it's the noise in the cylinder body, or if not, it's basically related to the starting system of the car.

There are many reasons for this phenomenon. For example, the piston ring is worn or broken, the connecting rod size head shaft sleeve is worn and knocks on the cylinder head, and after a period of time, the temperature rises, which will change the clearance, or the oil is sufficient, so that the phenomenon can be alleviated. It is recommended to send it to the factory for maintenance to avoid the expansion of faults and increase losses.

Hello! If it is from the engine, look at the throttle and idle motor, if not, check whether it is from the starter, other parts to very little, I hope my answer will help you, thank you! [Zhengzhou]--North].

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The car makes a clicking sound when it starts cold, probably because the gears inside the starter have lost their lubrication. Once the phenomenon of astringency and jamming occurs, it is likely to affect the timely return of the gear. In this case, be sure to drain oil on it to make it lubricating.

Parts should also be maintained in time, otherwise there may be certain problems when used. The engine oil should be used to match the car, and you can't covet some cheapness. Cheap oil can cause constant rust on people's homes, and it may also cause some problems in the car itself.

The abnormal noise of the cold start requires the car to be parked for a day, and the lubricating oil of the engine will basically flow into the oil pan. When starting the engine, the oil pressure may not be established at the first time, but after a period of time, a certain oil film will form. Inside the oil pan, the oil temperature rises constantly, and there may be a clattering sound.

During the parking process, you can choose to put your car in the underground garage, where the temperature is relatively low. Even if an oil film is formed, it can be dissipated in time during the start-up process. The oil pan should be treated in a timely manner, otherwise the oil will gradually be sealed.

Some people don't go to the car wash for a long time, and there will be dirty things inside the starter to block. In this process, the engine should be turned on in time and gently wiped with a rag. There is a high chance of rust in some areas, which can affect the operating status of the starter.

It is best to make an adjustment to these rusty things, and use a brush to remove the rust stains on them. <>

In general, the car is not able to make any abnormal noise, which will affect the operation of the car. The speed is getting worse and worse, which can lead to a shorter life of the car. In severe cases, not only will you hear a sound, but there may also be other problems.

The car should be sent to the 4S shop for maintenance in time, so that the car can be used for a longer time.

This may be a problem with the throttle, and it may be caused by severe carbon deposits on the throttle.

It may be said that the shelf of the car is not very good, so there will be some sounds like this, which makes people feel very bad.

When the vehicle is started, the engine squeaks because of the engine belt.

Caused by slippage. The clatter sound of the vehicle's engine when it starts cold, is the sound of the gap between the oil flowing back into the bottom pan after the vehicle has been stopped. There is a whining sound after the cold start of the engine, because the engine has selected a new idle speed control, and after starting, some gas will be burned in it to achieve preheating, so it is relatively normal to make such a sound.

The vehicle can start with a squeak and the engine belt slips

If you get this sound when you start it, but it disappears after starting, it's because the engine belt is slipping. You can check whether there are cracks in the appearance of the belt of the engine, in addition, we also have to check how tight this is. If this sound is only made when the weather is cold, or when the temperature drops suddenly, this is normal.

The car made a clicking sound, which was a gap sound

This kind of sound generally occurs after a long time of parking, the sound is relatively sharp, and the duration is relatively short, which is a relatively normal situation. After stopping, the oil is returned to the oil pan, the hydraulic oil passage of the engine is not filled with oil, and there is a sound between this tappet and the mechanical swing, which is what we hear. If the sound does not go away after starting, it is recommended that you go for some professional testing.

The car whined, it was the sound of gas burning

In order to improve fuel economy and engine efficiency, many machines use a 4-2-1 exhaust pipe. Normally, 20 seconds after the engine starts, there is a new idle speed control, and a small part of the gas mixture is burned in it to achieve rapid catalysis. Therefore, it is relatively normal to have this whining sound, if you find such a sound, don't worry, judge the difference in sound, and then choose a different method.

I think this may be due to the fact that when the car engine is cold started, the oil pump can not establish the oil pressure at the first time, and the oil film will be formed between the hydraulic parts, and the hydraulic iron column and the mechanical rocker arm will have a certain valve clearance, which will make a clicking sound, if the engine has been making abnormal noise, you must go to the repair shop for maintenance in time.

This is due to the mechanical friction sound of the upper parts of the engine that are not lubricated.

I think it may be that the timing belt of the car is broken or burr, and it is necessary to check whether the position of the starter of the car is out of position and whether the link starter is aging.

"If the car starts cold, the engine squeaks and quiets after about a minute, and the sound is very low when it starts hot, which is normal. The abnormal sound of cold start is a common problem of gasoline vehicles. The most fundamental reason for the shaking phenomenon of cold start or waiting in neutral is poor combustion in the cylinder.

If the combustion is not good, the power provided by the car will not be enough, and the car will shake.

First of all, if the car has not moved for a period of time, then the oil will return to the oil pan, which means that the top of the engine, that is, the valve chamber, will be less oil, because the valve lacks the sealing and lubrication of the oil, so when the car just starts, you will hear the sound of the bottom of the car, which is normal. However, in addition to the normal situation, there is a high probability that the engine belt is a problem if the car is started and there is a sizzling noise.

First, check the tightness of the engine belt, you can try to clamp the transmission belt with your fingers, and then twist it, note that the operation should be carried out when the engine is cool, and the twist angle should generally be below 90 degrees, otherwise it will be adjusted.

In addition, the abnormal noise of the engine belt is because the belt is too dirty, and the abnormal noise can also be eliminated by cleaning it with water or lubricating it with some lubricant, but whether all models are suitable for this operation to solve it needs further analysis.

It can be said that the sizzling sound of the belt may indicate that the belt needs to be replaced. Generally speaking, if it needs to be replaced, then the manufacturer will definitely introduce instructions in the vehicle owner's manual. According to the general car maintenance standard, it is about 60,000-80,000 kilometers.

Summary. Hello, this problem may be caused by insufficient oil pressure, it may be caused by a clogged oil pump filter, a faulty oil filter, excessive oil viscosity, or a problem with the timing system.

When the car starts cold, it makes a clicking sound, what's going on?

Hello, I have seen your inquiry, please wait for a moment and answer it for you immediately.

It seems that the gearbox rings there, and the hot car starts and cannot be heard.

Hello, this problem may be caused by insufficient oil pressure, it may be caused by the plugging of the oil pump filter, the slag leakage of the oil filter element, the excessive viscosity of the oil, or the problem of the timing system.

The gearbox doesn't ring, it's the engine that appears.

Oooh. Thank you.

Why does the car make a clicking sound when it starts cold?

This is the variable valve timing system of the vehicle, the oil valve can not seal the oil, which leads to the fact that there is no oil pressure in the camshaft during cold start, and the variable timing system cannot fix the camshaft position, so the camshaft has flutter, resulting in the sound of hitting the valve ejector rod, and the variable valve oil valve can be replaced, and the specific operation steps are as follows: 1. Press the sensor plug clip. 2. Unplug the sensor.

3. Remove the fixing screws of the transmitter. 4. Remove the sensor. 5. Install the new sensor and you're done.

When the car is in a collision or cold state, due to gravity, the oil is in the oil tank and has not yet come up. At this time, when the engine is started, there is no oil film between the parts, especially the cylinder head, valve and other parts, and there will be abnormal noise without lubrication. If there is a problem with the timing chain and the maintenance is not timely, the car can not continue to drive in this state, and it is easy to jump the chain, which will not only cause the car to make a sound during driving, but also lead to an increase in fuel consumption of the car, resulting in a decrease in the dynamic performance of the engine.

<> If the chain is severely broken, the car will shake while driving. The cold car starts and makes a strange noise, the hot car does not make a noise, and the cold car starts and the hot car does not make a sound, which may be due to the following reasons: If the owner starts the car cold, he finds that the engine has an abnormal sound of clicking.

The reason could be that all of the engine's lubricating oil flows back into the oil pan. This can easily happen if the vehicle is parked for a day and does not turn on.

When the engine starts, there is no lubricating oil, the oil pump cannot immediately establish oil pressure, and the parts cannot form an oil film. In particular, the valves of the cylinder head need to be lubricated for a cold start. If there is no lubrication, it will cause the valve clearance of the mechanical rocker arm, resulting in a click-and-click sound.

When the cold car starts, the air valve is not opened or the opening is small, which causes the engine to idle at low speed and unstable idle speed when the cold car starts. The snapping sound is usually a sound made by the chain in time. Without lubrication, the timing chain will make a strange sound.

If the timing chain is loose, it will sound strange. It is recommended to go to a 4S shop or a professional auto repair shop in time to check to determine the problem and then correct the symptoms.