Types of noise when starting a cold machine and their causes

The type of noise when starting a car on a cold can be important information for diagnosing a malfunction. Especially extraneous noise from the engine, which is the main warning of possible problems.

Of course, knowing how the car sounds under normal conditions is very important in order to classify various non-standard noises and anomalies in the car.

Noises when starting a cold machine, which can provoke them

Below are discussed in detail the main most common types of abnormal noises when starting the machine on a cold, as well as their possible causes:

1. The sound of the engine being difficult to start. When starting off in a cold environment, a low intensity of headlight light is noted, and a sensation of sound is perceived, as if the car is starting without force. This is a symptom caused by problems with the battery (low charge or in poor condition) or the terminals (possibly making poor connections).
2. “Skating” starter (“grrrrrrr…”). If the car starts to make friction noise between the gears when starting off, there may be a problem with the starter.
3. Noise in the engine (“chof, chof ...”). If you hear a noise when starting a cold engine, which is similar to “chof, chof ...” and there is a strong smell of fuel in the passenger compartment, it is possible that the nozzles are no longer tight or in poor condition. The noise produced by the nozzles is very characteristic and this is due to the effect of the emission of fuel vapor into the outside of the valve cover.
4. Metal friction noise. It may happen that when starting the engine cold, a friction noise was heard between metal parts from the engine area. This situation may be a symptom caused by a faulty water pump. This metallic noise can occur when the water pump turbine comes into contact with the pump housing itself.
5. Metallic noise (ringing) from the exhaust area. Sometimes, it may happen that some leak protector or clamp is loose or cracked. “Ringing” is produced by a metal part that has become loose or has cracks.
6. Creak from inside the car. If there is a noise when starting the car when it is cold and it sounds like a squeak coming from the inside of the car, it is possible that the heating fan is in poor condition (the balance axis is probably broken or there is a lack of lubrication).
7. The sound of vibration of metal sheets at startup. The noise from the vibration of the metal sheets during starting is usually associated with the poor condition of the pipe protectors. These protectors may crack or break due to external factors such as temperature, mechanical stress, etc.
8. Creak in the engine area. A creaking sound in the engine area when starting off may occur due to a timing belt pulley or tensioner in poor condition. This happens because the rollers or tensioners may become loose
9. Intermittency or knocking noise in the engine compartment area. This noise when starting the car when cold occurs, as a rule, due to the timing chain being in poor condition (stretched or faulty). In this case, the chain cuts into the skates and produces these knocking noises, especially if the engine is not hot.
10. Vibration of plastic in the engine area (“trrrrrrr…”). Vibration, changes in temperature or aging of the material can be caused by the fact that the cover that covers the engine is cracked or its supports are damaged, and, accordingly, vibrations of the plastic are heard.
11. Metallic noise exactly during startup, accompanied by vibration in the body and steering wheel. This symptom can be considered if the engine pistons are in poor condition. These symptoms may lead to a more serious problem.
12. The noise, as if a metal chime at start (“clo, clo, ...”). When starting off, noise may occur, ringing metal caused by a steering accident. This can be caused by unbalancing the steering wheel, causing vibrations that determine this noise. He is very characteristic.
13. Loud whistle in the engine compartment. Another possible noise when starting a car in cold weather is a whistle from the engine compartment, which may be caused by a defect in the exhaust manifold. A crack in this part, or a gasket in poor condition, both of which can create such a loud whistling noise.
14. Engine dangling or inharmonious noises. There is a possibility that such sounds occur in the engine when internal parts fail. As a rule, this malfunction is difficult to determine, because in order to diagnose accurately, you need to disassemble the engine.

Recommendations

There are many possible abnormal noises when starting a cold engine. When they are discovered, it is important to check the car as soon as possible, because, behind these noises, a serious malfunction may be hidden, or it may be a harbinger of a future serious problem.

To eliminate any type of noise when starting the car on a cold, it is highly recommended to contact the workshop. Answer 2 important questions: “what is the noise?” and “where does it come from?” This information will help technicians diagnose a malfunction.

Some of these noises are caused by wear or breakage of parts, plastic or metal. In many cases, it is not possible to replace the part (due to their high cost, lack of goods, etc.) and, to eliminate the malfunction, in such cases, it is recommended to use two-component glue.