1. Use the filter paper with low DU price to make the filter element. Due to the large aperture of the filter paper, poor uniformity DAO and low filtration efficiency, the harmful impurities to the engine cannot be effectively filtered, resulting in early wear of the engine.

2. Use low quality adhesive, and the amount is very small, neither oil resistant, and can not be firmly bonded, resulting in a short circuit at the bonding point of the filter element;Or the filter element joints using staples connection, unable to seal and short circuit, so that a large number of harmful impurities into the engine, reduce the engine life.

3. As an ordinary rubber instead of oil resistant rubber parts, in the process of using or filter internal short circuit formed by the internal seal seal failure cause engine early wear and cutting life or expansion deformation of external the seals, causing oil filter outside sealing ring out, a short time, a large number of drainage, make the engine burn watts, holding shaft, suffered severe damage.

4. The air filter shell parts should be welded by spot welding instead of seam welding, which cannot guarantee the tightness and results in short circuit.

5. The material of the center pipe of the oil filter is thin instead of thick, which is not strong enough. In the process of use, the center pipe is dented, and the filter element is damaged and blocks the oil circuit, resulting in insufficient lubrication of the engine;Or the reliability of the bite is poor, during the use of the bite opened, resulting in a large number of oil leakage in a short time, resulting in burning tile, shaft.

6. The end cover, center tube, shell and other metal parts of the filter element are not treated with rust, resulting in metal corrosion and impurities, making the filter into a source of pollution.More very person, replace adhesive with cement, its harmfulness is bigger.

Poor quality air filter is generally no filter function will shorten the life of the engine.The other thing is that it can affect people's physical safety, but these are hard to see, but some of the more serious hazards are not what you would expect.The other bad thing is that you can't filter all the air and it can cause congestion and then you end up mixing the engine with the air and you end up underpowered or you don't start it.No matter which kind of situation has hidden danger to the driving safety, so choosing a good air filter is very necessary for the healthy driving of the car.

Therefore, the cost of the inferior filter is very large, it is suggested that users must be careful when replacing the filter.Had better choose original factory fittings, in order to avoid unnecessary economic loss.