What are the most common misunderstandings in automobile maintenance?

2019-12-09 17:05:22

When a car needs to be repaired, it is often treated differently in various situations. Many car owners or repair points will "treat the same thing", but in fact, the same problem is not the same way to deal with it. There are several common misunderstandings in the daily repair of the car. In order to avoid the wrong place in the repair, let's have a look with the auto sheet metal parts manufacturer!

I. blind removal of engine thermostat

If the thermostat is removed blindly due to the high temperature of the engine, the coolant can only carry out a large cycle, and the cooling intensity can not be adjusted, so it is difficult to ensure that the engine works at a more appropriate temperature. On the contrary, the engine often works at a low temperature, resulting in the decrease of engine power, the acceleration of wear and tear, and the increase of fuel consumption. If the engine thermostat is still hot after troubleshooting or replacement, the other parts of the cooling system should be repaired, and the thermostat cannot be removed.

II. The engine temperature should not be too high but not too low

Some people think that when driving, the engine temperature is not afraid of high but not low. In fact, when the engine temperature is low, it is also very harmful. It is necessary to drive according to the normal temperature specified in the vehicle operation manual to ensure the service life of the engine.

III. The tighter the water pump fan belt, the better

The tighter the belt, the better. If the belt is too tight, it will not only lengthen or break, shorten the service life of the belt, but also lead to the deformation and bending of the generator shaft and the water pump shaft and the early damage of the bearing due to the excessive tension. The tightness of the fan belt of automobile engine shall meet the technical requirements. Generally, the deflection of normal belt assembly is 10-15mm.

IV. engine idling temperature rise

When the idle speed is used for heating up, due to the low speed, the oil pump cannot quickly put the lubricating oil pressure into the lubricating surfaces, and the oil pressure is also low, which makes the moving parts of the engine work under the dry friction or semi dry friction state; because of the poor low temperature atomization, the unburned fuel (mixture) rushes into the crankcase, washes off the oil film on the cylinder wall, and also accelerates the wear of the parts. Therefore, after the engine starts for a few seconds, the application of fast idling temperature rise (in modern cars equipped with fast idling device, the temperature rise, will automatically adjust to idle state), improve the engine lubrication conditions.

V. baking oil bottom with blowtorch

When baking the oil bottom with a blowtorch in winter, it will not only make the additives in the oil change chemically and lose their original performance, but also make the oil cemented and the oil bottom deformed, which is easy to cause fire. A good way is to select the appropriate engine oil according to the local low air temperature in winter. If possible, park the vehicle in the garage with thermal insulation facilities.

The more advanced cleaning methods are ultrasonic cleaning and nuclear spray cleaning, but the physical cleaning and chemical cleaning are the most widely used and simple methods. Both methods can also be used.