Inspection is also needed where the brake disc is invisible.

Buying a car of their own is not easy, so most car owners will take good care of their driving, timely maintenance, regular inspection. But the general routine inspection is too one-sided, many parts you can not see are difficult to touch, but have a vital impact on driving safety. So Xiaobian came to tell you, which parts can not be seen, how to check?
1. Spark plug: Increasing fuel consumption, worsening power and accelerating choking are all related to spark plug. Therefore, owners should not neglect the importance of spark plug. Generally, spark plugs are divided into ordinary, platinum, and iridium. Their service life ranges from 30,000 km to 100,000 km. Although the service life of spark plugs is relatively long, it has a great relationship with engine working conditions and oil products. It is necessary to regularly check the carbon deposit and spark plug clearance at the spark plug site.
2. Shock absorber: There is no definite mileage limit for replacing shock absorber. Generally, when the shock absorber is broken and replaced, oil leakage is the precursor of shock absorber failure. Therefore, it is necessary to check whether the shock absorber leaks oil regularly. Once the shock absorber damping decreases, the stability and comfort of the vehicle will deteriorate, and the braking distance will become longer.
3. Brake pads: brake pads are familiar to everyone, but the attention to the brake pads may not be as high as the brake pads. Usually, while checking the brake pad, we also need to check the brake disc. If there are obvious chamfers or cracks on the brake disc, we need to replace it as soon as possible. Generally, the brake disc needs to be replaced once if the brake pads are changed twice.
4. Steering tie rod: The loosening of steering tie rod is a serious potential safety hazard, so it must be checked during maintenance, not to be omitted. The inspection method is not difficult. Hold the tie rod and shake it vigorously. If there is no shaking, it means that everything is normal. Otherwise, the ball head or tie rod assembly should be replaced.
5. Ball cage sleeve: Ball cage is also called universal joint. Ball cage sleeve is a layer of rubber sleeve which plays a protective role. Don't underestimate this rubber sleeve. It not only has the function of dust-proof and sealing, but also prevents the loss of grease around the ball cage. Once the dust sleeve is damaged, the grease will soon run off and cause dry grinding, which will eventually lead to half-axle scrap.
6. Wheel bearings: The reason why the wheel can rotate is that it must be inseparable from bearings. Vehicles are running every day and bearings are turning every day. Therefore, it is necessary to check the front and rear wheel bearings. The inspection method is also very simple, lifting the vehicle and loosening the hand brake, turning the wheel with hand force in turn, listening to whether there is a "buzz" abnormal sound, if it does not represent everything is normal.