Six taboos for auto parts

1. I am afraid of "string"

Various coupling parts in the diesel fuel system, the main driven gear in the transaxle final drive, the hydraulically operated valve block and the valve stem, the valve core and the valve sleeve in the full hydraulic steering gear, etc. After special processing, it is ground in pairs, and it is very precise. It is always used in pairs during the life of the product. It is not interchangeable. Some mutual matching parts, such as piston and cylinder sleeve, bearing bush and journal, valve and valve seat, connecting rod head cover and shaft, etc., after a period of grinding cooperation, relatively good cooperation, should also pay attention to maintenance In pairs, don't "slam" each other.

2, the second is afraid of "reverse"

The cylinder head gasket of the engine can not be reversed during installation. Otherwise, the cylinder head gasket will be prematurely ablated and damaged. Some special shape piston rings should not be reversed. It should be assembled according to the requirements of different models; the engine fan blades also have direction when installed. Requirements, the fan is generally divided into two types: exhaust and suction, which can not be reversed, otherwise the engine will be poorly cooled and the temperature will be too high. For tires with directional patterns, such as herringbone tires, the ground marks after installation should make people The tip of the word points to the back to ensure maximum driving force. For the two tires that are installed together, different models have different requirements and cannot be installed at will.

3, three afraid of "oil"

The engine dry air filter paper filter has strong hygroscopicity. If it is stained with oil, it will easily inhale the mixture with higher concentration into the cylinder, resulting in insufficient air volume, increased fuel consumption and reduced engine power. The diesel engine may also Causes "speeding"; if the triangular tape is stained with oil, it will accelerate its corrosion and aging, and at the same time, it will easily slip, resulting in reduced transmission efficiency; brake shoes, dry clutch friction plates, brake bands, etc., if oiled Liquid, prone to slippage, poor work, thus threatening driving safety; starter motor and generator carbon brush, etc., oil stains may result in insufficient power of the starter motor and low generator voltage due to poor contact. Tire rubber is very sensitive to oil corrosion. Contact with oil can soften or peel the rubber. Short-term contact can cause abnormal damage or even serious damage to the tire.

4, four afraid of "washing"

Some people who are getting started with a car or a beginner's repair may think that all parts need to be cleaned. In fact, this understanding is one-sided. For the paper air filter of the engine, when removing the dust on it, it can't be cleaned with any oil. Just tap it with a hand or high-pressure air can be blown out from the inside of the filter element; for leather parts, it is not suitable. Clean with oil, just wipe it off with a clean cloth.

5, five afraid of "pressure"

If the tire tire is stored for a long time and does not turn in time, it will be deformed by extrusion and affect the service life; the paper filter of the air filter and fuel filter will have a large deformation if it is squeezed. It can not reliably play the role of filtration; rubber oil seals, triangle tapes, oil pipes, etc. can not be squeezed, otherwise deformation will occur, affecting normal use.

6, six afraid of "repetition"

Some parts should be used at once, and individual drivers or repairers are re-used in order to save or not understand the "taboo", which can easily lead to accidents. In general, engine connecting rod bolts, nuts, imported diesel engine injector fixing bolts, cylinder sleeve water blocking ring, sealing copper pad, hydraulic system various oil seals, sealing rings and important parts of the pin, cotter pin and other parts disassembly After that, it is necessary to replace the new product; for the engine cylinder head gasket, although no damage is found during the inspection, it is better to replace the new product, because the old product has poor elasticity, poor sealing, easy to ablate and damage, and it needs to be replaced after a long time, which is time-consuming and laborious. If you have new products, try to replace them as much as possible.

 

It should be noted that the auto parts manufacturing enterprises have become a global trend from the vehicle manufacturers and the formation of specialized parts groups. Internationally renowned auto and parts companies have established joint ventures or wholly-owned enterprises in China, and more than 1,000 technology joint ventures have been introduced. A number of domestic auto and parts companies with high technology content, good efficiency and large scale have gradually grown up. With the international automotive industry's implementation of the "global procurement" strategy for parts and the implementation of localization strategies by international multinational auto companies, there will be huge gaps in parts and components in the domestic market.