How to clean the car engine?

1. The outside of the engine can be cleaned, but it must be cleaned when it is cooled. If the engine temperature is too high, instantaneous contact with cold water may lead to deformation or even cracking of the cylinder block, and a large amount of water vapor generated will also lead to excessive moisture in the engine compartment, affecting some electrical components, thus preventing high temperature from scalding hands.

2, don't run down at high speed, wash the car immediately. After running at high speed, both the brakes and the engine are in the heat dissipation stage. At this time, washing the car and washing the brake disc with cold water will cause the steering wheel to shake slightly and the braking system to malfunction seriously, which will affect the driving safety.

3. Although the engine, fuse box and wiring are waterproof, don't point the high-pressure water gun at it for a long time. There will be a reminder on the fuse box in the engine compartment of some cars to prevent the high-pressure gun from being washed away here. Although there is waterproof treatment, there is generally no problem with rainwater, but the pressure of the high-pressure water gun is relatively high. In case of emergency, try to avoid the driving computer and the external safe area.

4. A car that is more than three years old, perhaps a hybrid car, must wrap the wiring harness and fuse box inside the engine with shrink film when cleaning the engine. Because the car has been driving for so long, these plastic parts are aging and waterproof, so be sure to protect them before washing.

5. If it is a vehicle with a long service life (over five years), it is not recommended to clean the engine with water. Because the car can't be hit by poor sealing, other engines can't be washed with water too often, otherwise it will accelerate the aging of the line.

6. The fuse in the car should not get wet. If washed directly with water, it is easy to cause short circuit and lead to circuit burning. When cleaning the engine compartment, we still try to avoid the fuse box being directly washed by water.

Extended data

Clean air filter

The air filter is directly related to the air intake of the engine when the car is running. The manager of Guangben dealership told the reporter that the air filter will not be blocked when the car is only driving in the urban area, but if the car is driving on dusty roads, it is necessary to pay special attention to the cleanliness of the air filter.

If the air filter is blocked or there is too much dust, the air inlet of the engine will be blocked, and a large amount of dust will enter the cylinder, which will accelerate the carbon deposition speed of the cylinder, which will hinder the ignition of the engine and cause insufficient power, and the fuel consumption of the vehicle will naturally increase. If you drive on a normal city road, you should check the air filter when the car travels 5000 kilometers. If there is too much dust on the filter element, consider using compressed air to blow out the dust inside the filter element. But the pressure of compressed air should not be too high to avoid damaging the filter paper. He told reporters that water or oil must not be used when cleaning the air filter to prevent oil and water from soaking the filter element.

Remove throttle sludge

There are many reasons for fouling at the throttle, some of which are carbon deposits formed by the exhaust gas from fuel combustion at the throttle; Then, impurities that are not filtered by the air cleaner will remain on the throttle. Too much sludge will cause air resistance and increase fuel consumption.

He said that the car should clean the throttle when driving 10000 to 20000 kilometers. When cleaning the throttle valve, first remove the intake pipe, expose the throttle valve, remove the negative electrode of the battery, turn off the ignition switch, straighten the throttle plate, spray a small amount of "carburetor cleaner" into the throttle valve, and then carefully scrub it with a polyester rag or a high-spin "non-woven fabric". Deep in the throttle, you can clip a rag and scrub it carefully. After cleaning, install the intake pipe and the negative electrode of the battery, and you can ignite!

Clean the carbon deposit on the fuel injector.

Because the combustion chamber is easy to produce carbon deposit, it is difficult to start; Carbon deposition in the fuel nozzle will also lead to oil blockage, gasoline injection deformation, poor atomization, and fuel consumption will naturally increase.

For the cleaning of the combustion chamber, a special carbon remover can be used to soften the carbon deposits on the combustion chamber and the fuel nozzle and separate them from the surface of the parts, and then remove the softened carbon deposits. This method of removing carbon has a good effect. Compared with the previous direct wiping, it has the advantage of not damaging the surface of parts, and the efficiency of removing carbon has also been greatly improved.

References:

Matters needing attention in Baidu Encyclopedia engine maintenance