Smoke from the exhaust pipe when the car is cold

It is normal for white smoke to emit from the exhaust pipe after starting the car. This is because the gasoline contains water and the engine is too cold. At this time, the fuel entering the cylinder is not completely burned, causing fog points or water vapor to form white smoke. In winter or rainy season, you can often see white smoke when the car is started for the first time. It doesn't matter. Once the engine temperature rises, the white smoke will disappear. This situation does not require repair

Smoke comes out of the exhaust pipe when the car is started

It is normal for the exhaust pipe to emit white smoke after starting the car. This is because the gasoline contains water and the engine is too cold. At this time, the fuel entering the cylinder is not completely burned, causing fog points or water vapor to form white smoke. In winter or rainy season, you can often see white smoke when the car is started for the first time. It doesn't matter. Once the engine temperature rises, the white smoke will disappear. This situation does not require repair.

The external manifestation of white smoke emission is that when the engine is running unstable, a large amount of white water vapor will emit. Even if the engine is warmed up to normal operation, a large amount of water vapor will still emit. This situation is mostly due to the wear of the cylinder head gasket of the engine cylinder, which creates a certain gap, causing a large amount of water in the cooling system to enter the combustion chamber. The water cannot be burned, and the steam generated after heating is directly discharged from the exhaust pipe. At this time, you need to check whether the engine block and cylinder gasket are damaged, and whether there is water in the fuel tank. If the problem is serious when the car is cold, the white smoke will not emit when the car is hot. This is because the gasoline contains water, and the fuel entering the cylinder after the engine is supercooled is not completely burned, resulting in fog points or water vapor forming white smoke. Sometimes the weather temperature is very low and white smoke can be seen for the first time when driving. Once the engine temperature rises, the white smoke will disappear. This is normal, don't worry.

Why is there an abnormal sound when the brakes are applied before starting a cold car?

The abnormal sound when the brakes are applied before starting a cold car is mainly caused by the slow braking speed when starting. This is also the case for many automatic transmissions. A common problem among car owners. When you slowly release the brake pedal, the engine has enough power to drive the car forward, but your brakes have not been completely released, so the moving wheels will naturally make abnormal noises when they are caught by the braking system. This is normal. of.

When a cold car is started in the morning, or a car that has been parked for a long time is restarted, if there is a "clicking" sound, it may be that the hydraulic lifter is worn or the system is depressurized. If the noise disappears quickly or disappears when the engine temperature rises, it's not a big deal and you can continue to use it. If the car starts to click again after being parked for half an hour, or if the car also clicks when it is warmed up, it will be more serious. At this time, the pressure of the lubrication system needs to be measured first. If the pressure is normal, the hydraulic lifter is basically faulty.

Brake discs and brake pads are high consumption products. Every time you brake, the two parts rub together, which naturally leads to wear over time. When they are worn excessively, they will naturally produce abnormal noise, so they should be inspected and replaced regularly. Usually the replacement cycle of brake pads is 60,000-80,000 kilometers, and the replacement cycle of brake discs is 100,000-120,000 kilometers.

Smoke comes out of the exhaust pipe when the car is started when the car is cold. Why is there an abnormal sound when the brakes are applied before starting the car when the car is cold @2019