Use low-priced filter paper to make the filter element. Because of its large pore size, poor uniformity, and low filtration efficiency, it cannot effectively filter out harmful impurities to the engine, causing early engine wear.
Use low-quality adhesive, and the amount is very small, which is neither oil-resistant nor firmly bonded, resulting in a short circuit at the filter element bonding; or the filter element seam is connected with staples, which cannot be sealed and short-circuited, causing a large amount of harmful impurities to enter the engine. Reduce engine life.
Replace oil-resistant rubber parts with ordinary rubber parts. During use or due to the failure of the internal seals, the internal short circuit of the filter may result in early engine wear and service life, or expansion and deformation of the external seals, causing the outer sealing ring of the oil filter to squeeze. In a short period of time, a large amount of oil was drained, causing the engine to burn bushes, hold the axle and suffer serious damage.
Spot welding is used to replace seam welding at the welding of air filter housing components, which cannot guarantee the tightness and forms a short circuit.
The material of the center tube of the oil filter is thinner instead of thicker, and the strength is not enough. During use, the center tube is collapsed and the filter element is damaged to block the oil circuit, resulting in insufficient lubrication of the engine; or the reliability of the bite is poor, and the bite is opened during use. As a result, the engine oil leaks in a large amount in a short time, causing bush burning and axle holding.
Metal parts such as filter element end caps, center pipes, and outer shells are not treated for rust prevention, which causes metal corrosion to produce impurities and makes the filter a source of pollution. What's more, replacing adhesive with cement is more harmful.
