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. Spot welding instead of seam welding is applied to the welding of shell parts of air filter, which cannot guarantee the tightness and forms short circuit.
　　This article is organized by dongguan oneness filtration technology co., LTD