Tighten it with the oil grid wrench. It is not safe to tighten it by hand, because there is pressure when the oil is running, it is easy to leak the oil, and the cylinder will be pulled seriously. The oil filter, also known as the oil grid, is used to remove impurities such as dust, metal particles, carbon deposits and soot particles in the oil to protect the engine.

Introduction of oil filter:
1. During the working process of the engine, metal wear debris, dust, carbon deposits oxidized at high temperature, colloidal sediment, water, etc., are continuously mixed into the lubricating oil. The function of the oil filter is to filter out these mechanical impurities and gums, keep the lubricating oil clean and prolong its service life.
2. The general lubrication system is equipped with several filters with different filtration capacities, such as filter collectors, coarse filters and fine filters, which are respectively connected in parallel or in series in the main oil passage and in series with the main oil passage, which are called full-flow filters. When the engine is working, all the lubricating oil is filtered by the filter, and the parallel filter is called a split filter;
3. The coarse filter is connected in series in the main oil passage, which is full flow, and the fine filter is connected in parallel in the main oil passage, which is split flow. Modern car engines generally only have a collector filter and a full flow oil filter. The coarse filter filters out impurities with a particle size of 0.05mm or more in the oil, and the fine filter is used to filter out fine impurities with a particle size of 0.001mm or more.
4. Oil filter, also known as oil grid. Used to remove impurities such as dust, metal particles, carbon deposits and soot particles in engine oil to protect the engine;
5. The oil filter is divided into full flow and split flow. 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;
6. The shunt filter is connected in parallel with the main oil passage, and only filters part of the lubricating oil sent by the oil pump;