Auto parts manufacturers teach you maintenance methods - Electrical Connectors - in addition to a few important electrical connectors using gold contacts, most of the other connectors are made of copper zinc alloy. Under normal circumstances, its reliability is guaranteed, but if the car operates in high temperature, high humidity and bumpy environment for a long time, these connectors may become loose, rusty and Poor contact and other faults, and some strange electrical faults are mostly caused by this.
Therefore, during routine maintenance, focus on checking the connectors of computers, sensors, fuel injection nozzles and other components on the vehicle.
Chassis components - from the perspective of use, chassis components are actually more prone to problems than the engine, but many people often ignore the inspection of chassis components during routine maintenance. The parts of the chassis that are prone to failure mainly focus on:
1. Shock absorber: oil leakage is a precursor of shock absorber damage. In addition, the obvious aggravation of driving bumps on bad roads or the longer braking distance are also signs of shock absorber damage.
2. Suspension control arm rubber sleeve: after the rubber sleeve is damaged, the vehicle will have a series of faults such as deviation and swing. Even four-wheel alignment is useless. If you carefully check the chassis, the rubber sleeve damage is easy to find.
3. Steering tie rod: the looseness of steering tie rod is a serious potential safety hazard. Therefore, this part must be carefully inspected during routine maintenance. The method is very simple: hold the pull rod and shake it with force. If there is no shaking, it means that everything is normal. Otherwise, replace the ball joint or pull rod assembly.
4. Exhaust pipe: the exhaust pipe is one of the most easily damaged parts under the car. Don't forget to take a look during maintenance. Especially the exhaust pipe with three-way catalyst should be carefully checked.
5. Universal joint dust cover: don't underestimate the dust cover outside the universal joint. It not only has the function of dust prevention, but also prevents the loss of grease around the universal joint. Once the dust cover is damaged, the grease will be lost quickly. Due to dry grinding, the universal joint is easy to be damaged.
Tires - pay attention to changing tires regularly. No matter how durable a group of tires is, they can't be used for a lifetime. Some people work easily and use the car less frequently. After a group of tires are used for several years, the tread pattern surface is intact, but in fact, the performance of tires will gradually age with the increase of age, and the quality will gradually decrease. If you don't understand this, It is wrong to think that "the surface looks good" means that the tire is OK.
When maintaining the tire, first remove the stones and other inclusions in the tread and check whether the outer tire has bubbles, layers, cracks, deterioration, aging and other faults; Secondly, when removing the tire, remove the rust on the rim, check whether the inner tube and lining are damaged or wrinkled, inflate according to the specified air pressure, and turn over or transpose the tire. In addition, check whether there is friction and collision between the tire and the wing plate, trunk bottom plate, leaf spring, fender, etc.
Battery - the battery is the key in the electrical system. A large number of electrical devices are used in the automobile. The abnormal operation of the battery will affect the performance of many devices. For example, in an automatic transmission vehicle, if the battery is abnormal, the vehicle will not start. Therefore, a stable power supply must always be available.
When checking the battery liquid level, it is considered appropriate if the liquid level is between the upper and lower scribed lines. At the same time, the liquid level difference of each tank should also be checked. If the liquid level is insufficient, unscrew the cover on the battery and pour distilled water to make up the liquid level.
Check the terminal of the battery and remove the dirt on the terminal with an iron brush. If the wiring clamp is seriously damaged, it can be rubbed along the inner wall with sandpaper to remove the dirt.
Brake pads - usually we will judge whether the brake warning light on the instrument panel is on as the basis for replacing the brake shoes, but this is the final bottom line. If we replace it at this time, it is already quite dangerous.
To remind you, although all vehicles have this warning system, some directly sense the thickness of the brake shoes, while others will light up only when the brake shoes have been completely worn and the brake fluid drops extremely. If it is the latter, wait until the warning light is on and the metal base of the brake pad and the brake disc are in the iron grinding state. At this time, bright iron filings will be seen near the rim edge of the tire. Therefore, check whether the brake pads can be used every time you enter the factory for maintenance, and replace the brake pads close to the end of service life in advance, instead of just believing in the warning light.