1. Making filter using filter paper with low price, due to their poor uniformity of large aperture, filter paper, filter efficiency is low, cannot effectively filter out the impurities will be harmful to the engine, resulting in early wear of the engine.
2. Use low-quality adhesive, and very little is neither oil nor strong bonding, filter element adhesive caused short circuit; Or filter joints using nails connected, unable to seal and short circuit, a large number of harmful impurities into the engine, reducing engine life.
3. In normal rubber instead of oil-resistant rubber, using internal seals or seal failure in the process of forming filter internal short circuit cause engine wear, long life of early abatement or by external seal swelling deformation, caused outside the oil filter gasket extrusion, within a short time a large number of drainage, the engine fire tiles, axle, suffered serious damage.
4. Air filter casing parts welding spot welding instead of seam welding, cannot guarantee the sealing, forming short circuit.
5. Oil filter pipe materials in thin thickness, strength is not enough, in the Center tube deflated during use, breakage plug oil filter, resulting in insufficient lubrication of the engine; Or bite-poor reliability, seam opened during use, causing the leakage of oil a lot in a short time, thereby causing Bush burning, and axle.
6. Filter end cover, Center pipe, casing and other metal parts, no rust, corrosion of metal impurities, to filter becomes a pollution source. What is more, replaced by cement adhesives, damaging more.
Therefore, inferior filters cost is great, would suggest that the user must replace the filter with caution. Best selection of genuine parts, so as to avoid unnecessary economic losses.