Best semi truck oil filter for diesel truck E251HD11 medium duty truck filters

Quick details

Model:Atego Series
Car Fitment:Mercedes Heavy Duty – Europe Heavy Duty
Year:1998-2004
OE NO.:E251HD11
Car Model:Truck
Size:247*119.4mm
Type:E251HD11 medium duty truck filters
Material:Filter Paper
Application:Auto Engine
Package:Custom Instruction
Sample Order:Acceptbale
Service:Professional Services
Color:yellow
Business Type:Manufacturer
Payment Terms:T/T

First, the role of the oil filter: filter impurities

Under normal circumstances, the various parts in the engine are lubricated by the oil to achieve normal work, but the metal debris, incoming dust, carbon deposits oxidized at high temperature and part of the water vapor generated during the operation of the parts will continue to mix in In the oil, a long time will reduce the normal service life of the oil, and in severe cases may affect the normal operation of the engine.
Therefore, at this time, the role of the oil filter is reflected. Simply put, the function of the oil filter is to filter most of the impurities in the oil, keep the oil clean and prolong its normal service life. In addition, the oil filter should also have the characteristics of strong filtering ability, small flow resistance and long service life.

Second, the oil filter composition: shell filter element

Simply put, the oil filter is mainly composed of two parts: filter paper and shell. Of course, there are also auxiliary components such as sealing rings, support springs, bypass valves, etc. These auxiliary components are not small. For example, the function of the bypass valve is that when the filter paper fails due to too many impurities, the oil will pass through the bypass. The valve flows into the engine for lubrication. However, only from the appearance we only see the oil filter as a whole, and the filter paper, bypass valve and other parts are invisible.

3. Maintenance cycle of oil filter: it is a vulnerable part

Under normal circumstances, dealers of various brands will classify oil filters as wearing parts. Taking FAW Toyota as an example, the warranty period of oil filters is 6 months after the delivery date or within 10,000 kilometers of driving. In terms of replacement, basically the oil and oil filter are replaced together. If it is not replaced for a long time, the function of the oil filter may be lost, which will eventually affect the engine operation.

Fourth, the disassembly and assembly of the oil filter:

When replacing the filter, first lift the vehicle through the lifter, and then unscrew the oil plug on the oil pan to drain the oil.
After the old oil in the car is completely drained, the filter wrench can be used to unscrew the old oil filter. When the oil in the car basically no longer seeps out, a new oil filter can be installed. When installing, the mechanic will apply a layer of oil on the new oil filter, in order to achieve a better sealing effect.

Five, the quality of oil filter identification method:

1. Appearance: fine and rough in appearance
The fake oil filter has rough printing on the surface of the housing, and the lettering is usually blurred. The factory logo font on the surface of the real oil filter is very clear, and the surface paint texture is very good. Careful friends can easily see the difference through comparison.
2. In terms of filter paper: the filter capacity
The fake oil filter has poor ability to filter impurities, which is mainly reflected in the filter paper. If the filter paper is too dense, it will affect the normal flow of oil; if the filter paper is too loose, a large number of unfiltered impurities will continue to flow randomly in the oil. Causes dry friction or excessive wear of engine internal parts.
3. Bypass valve: the auxiliary function
The function of the bypass valve is a device for emergency delivery of oil when the filter paper is blocked due to excessive impurities. However, the built-in bypass valve of most fake oil filters is not obvious, so when the filter paper fails, the oil cannot be delivered in time, which will cause dry friction of some parts in the engine.
4. Gaskets: sealing and oil seepage
Although the gasket looks a little inconspicuous, the sealing between components depends on it. The gasket material in the fake oil filter is relatively poor, and under the high temperature and high-strength operation of the engine, it is likely to cause its sealing failure, which will eventually lead to oil leakage.

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