A car is a complex mechanism consisting of thousands of interacting components, and its durability directly depends on the purity of working fluids and air. Many drivers perceive replacing consumables as a boring chore or a waste of money, not realizing that it is these elements that protect the health of the engine and the comfort of passengers. If the filtration system fails, the service life of expensive units may be reduced significantly, and repairs will become inevitable.
In this article we will look in detail at what kind of filters are there in a car?, how they work and why ignoring their condition can lead to critical breakdowns. You will learn about the nuances of the operation of oil, air, fuel and cabin cleaning systems, and also receive practical recommendations for their maintenance. Understanding these processes will help you not only save on repairs, but also ensure the safe operation of your vehicle.
Modern cars require high-quality maintenance, and knowing how your car works is the first step to proper operation. We will look at each type of filtration separately so that you have a complete picture of what is happening under the hood and inside the cabin of your car.
⚠️ Attention: Using cheap analog filters from unknown brands often leads to rapid failure of fuel equipment and a decrease in engine life.
Oil filter: the heart of the lubrication system
The oil filter is one of the most important elements in the engine lubrication system, ensuring that the engine oil is cleaned from wear products, carbon deposits and metal shavings. In progress internal combustion engine generates a huge number of microscopic particles, which, when caught in rubbing pairs, act as an abrasive. Without effective cleaning, the oil quickly loses its properties, and parts begin to deteriorate at a catastrophic rate.
Structurally, modern elements are a steel body, inside of which there is a filter element made of special paper or synthetic material. The most important part of the design is the bypass valve, which opens during a cold start or when the main element is dirty, allowing oil to bypass the filtration. This is necessary to engine is not left without lubrication, even if the filter is completely clogged.
When choosing a new element, you need to pay attention to throughput and paper quality. Cheap models often have insufficient filtration area, which leads to a rapid increase in pressure and opening of the bypass valve during normal operation. As a result, dirty oil circulates through the system, accelerating wear. crankshaft and camshaft.
Replacement intervals directly depend on operating conditions and the quality of the oil used. In urban conditions, typical for the “start-stop” mode, the service life of the oil and filter is reduced by 30-40% of that declared by the manufacturer. Therefore, many experts recommend changing the oil filter at every oil change without trying to skimp on this critical component.
When replacing the oil filter, always lubricate the rubber gasket with new oil - this will ensure a seal and easy removal in the future.
Air Filter: The Breath of Your Engine
The air filter protects the engine cylinders from dust, sand and other particulate matter from the atmosphere. The combustion of one liter of gasoline requires about 15 liters of air, and if this air is not cleaned, abrasive particles will quickly lead to scuffing in the cylinders and piston rings. Intake system The car is designed to deliver maximum volume of air with minimum resistance, but cleanliness comes first.
There are several types of air filters, the most common being paper filters that trap particles up to 5 microns in size. There are also oil and zero resistance (zero) ones, which require special maintenance and impregnation. Paper elements are disposable, and trying to blow them through with a compressor only destroys the paper structure, opening the way for dust to enter the engine.
A dirty air filter creates additional intake resistance, which leads to a richer air-fuel mixture. The engine begins to “choke”, fuel consumption increases, power decreases and the toxicity of exhaust gases increases. A visual inspection of the element at each maintenance will help determine the need to replace it ahead of schedule, especially if you often drive on dirt roads.
Metal mesh| Filter type | Material | Resource (km) | Service |
|---|---|---|---|
| Staff | Special paper | 10 000 - 15 000 | Replacement |
| Zero resistance | Cotton gauze | 50 000 - 100 000 | Washing and impregnation |
| Oil (old type) | Long lasting | Washing with kerosene |
The myth of the zeros
Is it worth installing a zero-resistance filter?: Zero-resistance filters do reduce intake resistance, but their filtering capacity is often lower than standard ones. For civilian cars, the increase in power is unnoticeable, and the risk of dust getting into the engine increases.
Fuel filter: protection against impurities
The fuel filter is designed to clean gasoline or diesel fuel from mechanical impurities, water and tarry deposits before supplying it to the injectors. Modern injection systems, especially Common Rail on diesel engines, they have precision pairs with gaps of several microns. The entry of even the smallest grain of sand or a drop of water can cause water hammer or jamming of the plunger pair, which leads to expensive repairs.
On cars, fuel filters can be located in different places: in the tank (in the fuel pump module), under the bottom of the car or in the engine compartment. Coarse gasoline filters are often mesh filters and last a long time, while fine filters require regular replacement. Diesel filters are additionally equipped with separators to remove water and often have sensors for the presence of water in the fuel.
The quality of fuel at different gas stations can vary greatly, so the condition of the fuel filter is an indicator of what you refueled with. A clogged element leads to a drop in pressure in the fuel rail, which manifests itself in traction failures, engine tripping at high speeds and difficult starting. For diesel cars, it is critical to change the filter before the onset of cold weather to avoid waxing.
⚠️ Attention: On diesel cars, when replacing the fuel filter, it is necessary to remove air from the system (pump), otherwise the engine will not start.
Cabin filter: health of driver and passengers
The cabin filter, or air conditioning system filter, cleans the air entering the car interior from pollen, dust, soot and unpleasant odors. For people suffering from allergies or asthma, having a quality filter is not just an option, but a necessity. Modern cars use carbon filters that can adsorb harmful gases, such as nitrogen oxides and ozone, generated in city traffic.
This element is usually located behind the glove compartment or under the windshield in the air intake area. Over time, the filter becomes clogged with dust and becomes damp, becoming an ideal breeding ground for bacteria and mold. It is the old, wet filter that often becomes the source of an unpleasant musty odor when turned on. air conditioner or stoves.
Replacing the cabin filter is one of the simplest procedures that you can do yourself in 10-15 minutes. However, many owners forget about it for years, wondering why the car is stuffy and smells damp. Regular replacement, especially before the summer season, will provide fresh air and reduce glass fogging, since a clean filter allows better air flow.
☑️ Signs of replacing the cabin filter
Transmission and other system filters
In addition to the basic engine and cabin filters, there are other important cleaning elements in your car that are often overlooked. Automatic transmissions (automatic transmissions) are equipped with filters that protect the valve body and clutches from wear products. Although many manufacturers claim that the automatic transmission is filled with oil for its entire service life, the filter in the box tends to become clogged, which leads to kicks when switching and overheating of the unit.
Exhaust gas cleaning systems also use filter elements, such as a diesel particulate filter (DPF) on diesel engines and a gasoline equivalent (GPF). They trap particulate soot particles, preventing their release into the atmosphere. These elements require periodic regeneration (burning out accumulated soot), and their condition directly affects the environmental friendliness and traction characteristics of the motor.
Also worth mentioning are power steering filters, which are found on some models, and filters in crankcase gas recirculation systems. An integrated approach to maintenance involves checking all systems, not just those listed in the minimum maintenance list. Ignoring the condition of the automatic transmission filter can lead to repairs, the cost of which is comparable to the price of a used car.
The service life of transmission and exhaust system filters often exceeds the service interval, but their condition must be monitored during routine diagnostics.
Practical advice on selection and replacement
When choosing filters for your car, it is important to be guided not only by price, but also by the reputation of the manufacturer. The market is filled with counterfeit products, which may be indistinguishable from the original on the outside, but contain low-grade material inside. Original filters or high-quality analogues from well-known brands (such as Mann, Mahle, Bosch, Filtron) guarantee the declared characteristics and reliability.
The replacement process also has its own nuances. For example, when installing an oil filter, it is important not to overtighten it, using only hand force and not a wrench. For an air filter, it is important to have a tight fit in the housing so that untreated air does not enter the engine bypassing the filter element. Compliance with replacement technology is the key to ensuring that new parts will last their full service life.
Keep records of replacements made, recording mileage and date. This will help you remember about the next service and keep track of the car's condition. If you operate your car in difficult conditions (dust, traffic jams, short trips), reduce the replacement intervals for all filters by 20-30%.
⚠️ Attention: Purchasing filters in markets or in dubious online stores without certificates carries a high risk of purchasing a fake, which can damage the engine.
Frequently asked questions (FAQ)
How often should the oil filter be changed?
It is recommended to change the oil filter every time you change the engine oil. Trying to save money and replace the filter after one oil change does not make sense, since the cost of the filter is not commensurate with the risks to the engine. On average, the interval is 10-15 thousand kilometers, but in urban conditions it is better to reduce it to 7-8 thousand.
Can the air filter be washed and reused?
Conventional paper air filters cannot be washed - water destroys the paper structure and adhesive joints. There are reusable zero-resistance filters that are washed with a special solution and soaked in oil, but they require regular maintenance and are not always suitable for everyday civilian use.
Why does the cabin smell damp after replacing the cabin filter?
The damp smell may persist if there is mold or condensation in the air ducts that accumulated while the old filter was in place. The cause may also be a poor-quality new filter or moisture ingress during installation. It is recommended to treat the air conditioning system with an antibacterial spray and dry the interior.
Does a dirty fuel filter affect fuel consumption?
Yes, it does. A clogged fuel filter disrupts the pressure in the system, and the electronic engine control unit may not correctly form the fuel-air mixture. This leads to incomplete combustion of fuel, loss of power and, as a result, increased consumption. The engine runs less efficiently as it tries to compensate for the lack of fuel.
Do I need to change the filter in the automatic transmission?
Yes, the automatic transmission filter needs to be changed, especially if you plan to change the oil. In many modern automatic transmissions, the filter is built into the housing and is considered maintenance-free, but on most cars it is removable and requires replacement along with the oil to extend the life of the box.