1. Depilation of circles with wax: a bad effect
Many people habitually apply wax to body of car in a circular motion, which is wrong way. The correct method of waxing is to do it in a straight line, alternating between horizontal and vertical lines, and then do latter according to direction of rainwater flow to achieve effect of reducing concentric halo on surface of car. dye.
Two, too much oil: failure
If there is not enough oil in engine oil pan, friction between bearing and journal will be poorly lubricated due to small amount of oil, which will aggravate wear rate and even cause shaft to catch fire. However, if there is too much oil, crankshaft and big end of connecting rod will mix a lot when engine is running, which will not only increase engine's internal power loss, but also increase amount of oil splashed. on cylinder wall, resulting in oil combustion failure. Therefore, engine oil level in engine oil pan should be monitored between upper and lower engraved lines on dipstick.
Third, bolt is too tight: irreversible deformation
There are many fasteners on car, connected by bolts and nuts. Make sure they have sufficient pre-torque, but do not overtighten them. On one hand, connecting parts will be irrevocably deformed. under action of an external force, and on other hand, this will lead to permanent deformation of bolt, and preload force will instead decrease and even cause slippage or breakage.
Fourthly, fan belt is too tight: load on bearing is high
The temperature in summer is too high. Some drivers find that increasing fan belt tension will cause belt to be too tight. They don't know it's wrong. The fan belt must be properly tensioned, as too much tension will result in excessive bearing load, increased wear and increased power consumption, as well as bending water pump shaft, elongating and deforming belt, and shortening its service life.
Five, new battery not charging: shortened life
The first charge of battery is called initial charge, which greatly affects life of battery. If it is not charged, that is, used directly with "water", battery capacity is small, and service life will be shortened; if it is charged directly, service life will also be shortened. Typically, the battery is initially charged after filling with electrolyte, and it can be installed and used after charging with a small current for about 1 hour.
6. Accidentally adding equipment to a car: impact on driving safety
A private car is owner's mobile home. It is clear that desire for comfort and luxury for passengers is understandable, but some car owners independently install various equipment in car. Reliability often leads to negative consequences, leaving consequences or affecting driving safety.
Seventh, cooling water temperature is too low: wear begins
It's hot in engine in summer. Some drivers blindly demand that coolant temperature be as low as possible so that engine temperature is not too high; some drivers simply remove thermostat to achieve goal of cooling. Car engines are afraid of both heat and cold, too low coolant temperature impairs fuel combustion, increases fuel consumption, increases wear, increases oil viscosity and reduces engine power. Tests have shown that at a cooling water temperature of 40-50 degrees Celsius on move, engine wear will increase by 60-80%, power will decrease by 25%, and fuel consumption will increase by 8%. -10%. Therefore, temperature of engine cooling water should not be as low as possible, and should generally be kept within 80-90 degrees Celsius.