Many owners like to do their own car maintenance replacement parts, but the owner of their own in the purchase of parts to learn to distinguish between true and false advantages and disadvantages, today to talk about how to distinguish the oil filter.

Oil filter, also known as oil grid. It is used to remove impurities such as dust, metal particles, carbon precipitates and soot particles in the oil to protect the engine. Oil filter has full flow and shunt type. The full-flow filter is connected in series between the oil pump and the main oil passage, so it can filter all the lubricating oil entering the main oil passage. The shunt cleaner is in parallel with the main oil passage, and only part of the lubricating oil sent by the filter oil pump is filtered.

Full-flow oil filters should be tested according to ISO4548 standard.

Filter paper requirements

The oil filter has higher requirements for filter paper than the air filter, and the temperature varies from 0 to 300 degrees. Under the drastic temperature change, the oil concentration also changes accordingly, which will affect the filter flow of the oil. The filter paper of the high-quality oil filter can filter impurities under severe temperature changes to ensure sufficient flow.

The filter paper material of the fake oil filter is poor, the filter paper itself is soaked in the oil for a long time, the filter paper itself is poor in the environment of high temperature and high pressure, and the filter paper itself also produces a large number of paper scraps, which leads to the oil circuit blockage of the engine lubrication system or causes abnormal wear of parts, and the engine is not oil when it is serious, leading to serious damage or scrap of the engine. The sealing parts of the fake oil filter gasket, due to poor rubber toughness, high temperature is easy to aging and cracking, so the oil is easy to jump out of the combination surface of the filter and the cylinder, resulting in oil leakage, poor engine heat dissipation and other failures, and will explode the cylinder in serious cases.

Poor quality oil filter distinguish

1. The font printing on the surface of the filter is fuzzy or not clear enough, the paint surface of the font printing is inferior, and the thinner one is inferior.

2, there is no bypass valve, if there is no filter once clogged, the engine will not be able to get enough oil lubrication.

3, the filter paper material is different, it is difficult to achieve the predetermined filter effect. The use of low-price filter paper to make filter elements, because of its filter paper aperture is large, poor uniformity, low filtration efficiency, can not effectively filter out harmful impurities to the engine, resulting in early engine wear.

4, gasket sealing material is poor, high temperature and high pressure may cause oil leakage, and even lead to fire. Gasket sealing material is good, rubber rules.

5, thread processing precision, no obvious turning marks above the thread.

6, the end cover of the filter core, the center pipe, the shell and other metal parts, do not carry out anti-rust treatment, resulting in metal rust impurities, so that the filter becomes a source of pollution.

7, metal oil mesh rough workmanship, it is difficult to ensure the amount of oil.