Why is the cost of car maintenance so high?

Why is the cost of car maintenance so high?

As the “heart” of the car, the engine must be carefully maintained. The following is a summary of the major misunderstandings that are prone to car engine maintenance, and hope to help you with your daily car.

Reminder: It is not only the maintenance of the engine during the regular maintenance period, but also the inspection and maintenance of the relevant parts of the engine when driving through some particularly humid or dusty areas.

Blindly remove the engine thermostat

If the thermostat is removed blindly due to the high engine temperature, the coolant can only carry out a large cycle, and the cooling intensity cannot be adjusted. It is difficult to ensure that the engine works at a suitable temperature. Instead, the engine often works at low temperatures, resulting in a decrease in engine power. , The wear is accelerated and the fuel consumption increases.

Idle speed heating for engine

When using idling speed to heat up, due to the low speed, the oil pump cannot press the lubricating oil into the lubricating surfaces quickly, and the oil pressure is also low, so that the moving parts of the engine work under dry friction or semi-dry friction; the low temperature of fuel Poor atomization causes unburned fuel to flee into the crankcase, wash away the oil film on the cylinder wall, and also accelerate the wear of parts. Therefore, a few seconds after the engine is started, the fast idle speed is applied to improve the lubrication conditions of the engine.

The engine temperature is afraid of high, not afraid of low

Some people think that the engine temperature is not afraid of high or low when driving. In fact, it is also very harmful when the engine temperature is low. The service life of the engine should be ensured by driving according to the normal temperature specified in the car operation manual.

Bake the oil bottom with a blowtorch

Using a blowtorch to bake the oil bottom in winter will not only chemically change the additives in the oil and lose its original performance, but also cause the oil to cement and deform the oil bottom, which may cause fires. The best practice is to select suitable engine oil according to the local minimum temperature in winter. Where conditions permit, it is best to park the vehicle in a garage with insulation facilities.

The tighter the water pump fan belt, the better

The tighter the belt is not the better. Too tight the belt will not only make it stretch or break, shorten the life of the belt, but also cause the generator shaft and water pump shaft to deform and bend and early damage to the bearing due to excessive tension. The tightness of the fan belt of the automobile engine should meet the technical requirements. Generally, the deflection of the normal belt assembly is 10-15mm.

Automobile oil deterioration and poor oil filter

The oil quality of different grades of lubricating oil will change during use. After a certain mileage, the performance of the vehicle will deteriorate, which may cause various problems to the engine. In order to avoid the occurrence of these failures, the car should be changed regularly in accordance with the conditions of use, and the amount of oil should be moderate, generally between the upper and lower limits of the oil scale.

Reminder: Don’t add less engine oil, but don’t add too much. It is not that the more expensive the brand-name synthetic engine oil, the better. The engine oil suitable for your car is the best.

Air filter plugged

The air intake system of an automobile engine is mainly composed of an air filter element and an air intake duct. According to different usage conditions, the air filter element should be cleaned regularly. The methods that can be used are high-pressure air blowing from the inside out to blow out the dust in the filter element. The air filter element should generally be replaced after cleaning 3 times. The cleaning cycle can be determined by the air quality in the daily driving area.

Reminder: It is also very important to buy genuine air filter elements provided by good quality manufacturers.

Dirty intake pipe

If the vehicle often drives on the road with more dust and poor air quality, you should pay attention to cleaning the air intake duct to ensure the smooth flow of air intake. The intake pipe is very important for the normal operation of the engine. If the intake pipe is too dirty, it will cause a decrease in efficiency, which will make the engine unable to operate within the normal output power range, and aggravate the wear and aging of the engine.

Reminder: Try to avoid the dusty areas, and at the same time, pay attention to the replacement of the air-conditioning compartment.

Excessive sludge in crankcase

During the operation of the automobile engine, the high-pressure unburned gas, acid, moisture, sulfur and nitrogen oxides in the combustion chamber enter the crankcase through the gap between the piston ring and the cylinder wall, and the metal powder produced by the wear of the parts Mix together to form sludge. It is difficult to lubricate the engine, which intensifies the wear of the engine. In addition, when the engine oil is oxidized at high temperatures, paint film and carbon deposits will be formed and adhered to the piston, which will increase the engine’s fuel consumption and decrease the power.

Reminder: To reduce the production of sludge, it is very necessary to use high-quality fuel. Therefore, it is recommended that car owners go to a regular gas station as much as possible when refueling. In addition, the use of quality lubricants and the replacement of lubricants and oil filters in accordance with the maintenance intervals specified by the manufacturer are also critical.