Is it normal to make a sound when the cold car starts in winter?

Is it normal to make a sound when the cold car starts in winter?

Is it normal to make a sound when the cold car starts in winter?

When the cold wave hit, many parts of the country were in a state of whiteness, but the weather was too cold, so it was inevitable that cars would go on strike. Especially the sound of "da da da" at startup is very annoying. Do you still suspect that the car is broken?

It is normal, not a fault, for a cold car to start with a sound in winter. However, it should be noted that when the engine reaches the normal working temperature after driving for a period of time, if there is still abnormal noise at this time, it is likely that the vehicle has broken down and needs to be repaired in the 4S shop as soon as possible to avoid further losses.

Q: Since it is not a fault, why does it click when starting?

A: After the vehicle was parked overnight, the lubricating oil in the engine has returned to the oil pan. At this time, when the vehicle starts, the lubricating oil can't fill the engine for the first time to form an oil film, and the metal parts in the engine rub against each other, so the noise is naturally loud. When the engine runs for a period of time and the oil is fully lubricated to form an oil film, the sound will decrease or even disappear.

Q: But I don't think so in other seasons. Only winter is particularly obvious.

A: The temperature is the lowest in winter, so it takes more time for the engine to reach the optimal working temperature. After the vehicle is started, in order to make the engine warm up to meet the driving requirements as soon as possible, the driving computer will control the engine to increase the speed, and then reduce the speed after the temperature is normal. In addition, low temperature will harden the rubber parts in the car, which will affect the vibration filtering effect and the noise will naturally increase.

Q: This noise is so annoying. Is there any way to reduce it?

A: The most effective way is to change the winter oil with better liquidity. Take 5W30 engine oil as an example, where 5 refers to the low-temperature starting viscosity. The smaller the number, the better the low-temperature starting performance. 30 refers to the kinematic viscosity at high temperature, and the higher the value, the higher the viscosity at high temperature. It is suggested that the engine oil suitable for winter use should be changed according to the suggestion of 4S shop, so that the engine can enter a more fluid state as soon as possible and reduce the engine wear when the cold car is started.

As the saying goes, the same is true for cars that make up for the winter this year, and the tiger will spring next year. Using the right products in the right season, more maintenance and care can make the car in a better state, reduce the probability of failure and extend its service life.