【The owner's family car knowledge】People have some misconceptions in the use and maintenance of automobiles. These misconceptions have been formed for a long time in the era of low automobile manufacturing level, backward repair methods, and lack of inspection methods. These misconceptions sometimes seem correct, but in fact they are not. They are very harmful and will cause damage to the vehicle and threaten personal safety. It is even more likely that the hidden danger of the accident will be buried, or the performance of the vehicle will be degraded. Accelerated wear and shortened life.
1. Blindly remove the engine thermostat
If the thermostat is blindly removed 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 a low temperature, resulting in a decrease in engine power. , The wear is accelerated, and the fuel consumption increases. If the engine temperature is still high after the engine thermostat is overhauled or replaced, other parts of the cooling system should be inspected and the thermostat cannot be removed.
Two, 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, the hazard is also great 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's instruction manual.
Third, the tighter the water pump fan belt, the better
The tighter the belt is not the better. Over-tightening of the belt will not only cause it to lengthen or break and shorten the service life of the belt, but also cause the generator shaft and water pump shaft to deform and bend and early damage to the bearings 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 should be 10-15mm.
Fourth, the engine uses idle speed to heat up
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 fuel is due to low temperature Poor atomization will cause unburned fuel (mixed gas) to escape into the crankcase, wash away the oil film on the cylinder wall, and accelerate the wear of the parts. Therefore, a few seconds after the engine is started, the fast idling speed is used to increase the temperature (a fast idling device is specially equipped on modern cars, and the engine temperature will automatically adjust to the idling state) to improve the lubrication conditions of the engine.
Five, use a blowtorch to bake the oil bottom
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 is likely to cause fires. The best way is to choose 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 more advanced cleaning methods are ultrasonic cleaning and nuclear spray cleaning, but the most used and simplest methods are physical cleaning and chemical cleaning. These two methods can also be used at the same time.
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