Every season, 4S stores offer some free inspection programs to help you check the basic condition of your vehicle, and almost 100% of manufacturers offer chassis inspection programs. Don't underestimate the chassis inspection program. It is important to know that the chassis system is related to whether our vehicle can run properly, and in the used car market, judging the vehicle is one of the most intuitive criteria. So today, let's talk about chassis maintenance knowledge.
First of all, let's talk about what causes damage to the car chassis!
First, drag the bottom, foreign objects hit the chassis
Seriously, the speed of China's road construction really surprised me. The road just fixed today will be built again tomorrow. Cut the belly. However, when the road is repaired, in most cases, there will be a lot of big rocks or potholes. At this time, driving our cars on such roads will bring the boulders or other road bumps into close contact with the undercarriage of our own vehicles, which is often referred to as dragging the bottom.
Each vehicle has its own approach, departure and passing angles, and exceeding the values will drag the bottom;
Because of the uncertainty of dragging the bottom, it is very easy to cause damage to the parts located in the chassis, such as cracking of the three-way catalytic converter housing, cracking of the engine oil sump, cracking of the gearbox housing, or deformation of the suspension system. These problems can be fatal to your car.
Second, corrosion
The environment is really getting worse nowadays, even the rain is acid rain, and in this environment, our car may increase the possibility of damage. Because the chassis will often come into contact with sewage, grease and other substances, and the chemicals in these substances will slowly corrode the chassis as well as the parts on the chassis, so you have to pay more attention to the corrosion of the chassis.
In addition to the dangers of rain and sludge corroding the chassis, de-icers for melting snow in the winter and seawater can also corrode our chassis, especially seawater. If you drive yourself to the beach, make sure you don't drive your car into the ocean. Seawater is very corrosive to chassis. If you accidentally touch the chassis with seawater, clean the chassis as soon as possible with plenty of fresh water or a neutral detergent.
Three, how to avoid
Generally speaking, in order to prevent just now can easily lead to chassis damage in two cases, 4S stores will recommend that owners install engine shroud or call the chassis &ldquo chassis armor &rdquo chassis protection. I strongly recommend the installation of the engine shroud proposal, because some economy cars in order to save costs, will not be installed under the engine and transmission protection, so that the engine and transmission will be in direct contact with the road. With an engine guard installed, the engine, transmission and vital parts located in the front chassis are manually protected so that even if an underride does occur, it will contact the guard before the vital parts are damaged.
&ldquoChassis armor&rdquo is the chassis protection technology in recent years. The lower side of the car chassis sprayed with a layer of elastic sealing material with a thickness of 2~4mm, chassis armor can effectively protect the road gravel impact on the chassis to prevent the bottom of the mop from slight friction. Prevent acid, alkali, salt corrosion chassis; prevent chassis screws from loosening; reduce the transmission of noise while driving, increase the sense of serenity of driving; prevent the chassis iron plate heat conduction, so that the cab warm in winter and cool in summer.
The two chassis protection measures just mentioned have been used in my personal car, in which the engine guard is very useful, especially for those vehicles with soft suspension springs, because at high speeds, when passing through potholes on the road, the compression of the soft springs will reach its limit, which will lead to damage to the engine and other important parts in contact with ground objects.
As for &ldquochassis armor&rdquoI also recommend that you use this measure. It's not likely to have an immediate effect, but it's always good to be prepared.
Knowledge Expansion:
1) How to choose a qualified engine shield?
There are four main types of engine guards:
Hard plastic, resin, steel and aluminum alloy. The characteristics of different types of protection plates are fundamentally different. I believe that after reading the following introduction, you will know what kind of engine guard to choose.
1. Hard plastic and resin protection plate.
Relatively cheap, simple production process. However, it should be noted that this material is easy to break the guard plate, especially in winter, easy to damage, can not be repaired after the break, can not play a long-term protective role.
Advantages:Light weight, low price.
Disadvantages:Easily damaged.
2. Steel or manganese alloy protection plate.
But it should be noted that when choosing this kind of protection plate, is its design style and automobile as well as matching the quality of supporting accessories, so be sure to choose the products of regular manufacturers. Protective plate made of this material in Chengdu can maximize the protection of the engine and chassis of the important parts, but the disadvantage is the weight.
Advantages:Strong impact resistance.
Disadvantages:Large weight
three. Aluminum alloy protection plate.
It should be noted that many beauty stores are promoting these products, focusing on the high profits behind its high price, but its hardness is far less than the steel protective plate. Damage is difficult to repair, and the alloy material is extremely complex and difficult to characterize, but it is characterized by its light weight.
Advantages:Light weight
Disadvantages:High price and low material strength.
Engine shroud installation is very simple. Purchase a shield that matches your model, and you can install it in 10 minutes, or even complete the operation yourself.
2)The price of chassis armor on the market is not the same. How to dazzle?
The price of chassis armor on the market is not uniform, ranging from a few hundred to a few thousand dollars. But basically, can be carried out chassis armor construction of the materials used in the place are basically similar, just different manufacturers. Due to the lack of systematic management, the price of chassis armor is highly profitable, so please pay attention when choosing a construction site. Generally, the price of chassis armor of better quality is around 500-800 yuan. The main brands used in the current market include Henkel and 3M in the U.S.
In addition, if you decide to armor the chassis, please make sure to take care of the equipment at the construction site. &ldquoChassis armor&rdquo construction is quite troublesome. First, carefully remove the oil on the chassis, thoroughly remove the asphalt, oil and so on. Use a special detergent, and then dry. Any negligence in these treatments will affect the firmness of the &ldquoarmor&rdquo. Then seal the parts that need to dissipate heat, such as drive shafts and exhaust pipes, and spray them with tape or waste newspaper. In order to avoid accidental damage and affect its normal operation, these tapes or newspapers should be removed after construction to avoid danger.
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