The car is a complex mechanism where each system depends on the quality of the working environments circulating inside. Replacement of all liquids in the vehicle It is the foundation of maintenance, without which it is impossible to guarantee the durability of the nodes. Ignoring regulations or using poor-quality consumables can lead to expensive overhaul of the engine or transmission.
Many owners mistakenly rely solely on the onboard computer readings or dealer interval reminders, forgetting about the real operating conditions. In reality, motor-oil, antifreeze and brake fluid They are degraded faster than it is in the factory tables. Understanding the physicochemical processes of fluid aging will help you avoid sudden breakdowns on the track.
In this article, we will take a closer look at each system that needs attention and explain why savings on “expenditures” always go sideways. You will learn how often you need to update technical fluids and what to look for when choosing brands.
Motor Oil: The Heart of Your Engine
Motor oil performs not only a lubricating function, but also removes heat, cleans the parts from soot and protects against corrosion. Over time, the products of combustion of fuel and wear of metal accumulate in the oil, and the additives that provide its properties are destroyed. Viscosity oil changes, it becomes too liquid or, conversely, thick, which is critical for the work hydrocompensator and phase-turner.
There is a common misconception that synthetic oils can be changed once every 15-20 thousand kilometers. This is only true for ideal laboratory conditions or driving on empty tracks at a constant speed. In urban mode, characterized by frequent downtime in traffic jams and short trips, the oil resource is reduced by 30-40%.
⚠️ Warning: Never focus on the watch unless you keep an accurate record of the engine. It is easier to reduce the replacement interval to 7-8 thousand km for gasoline and 10-12 thousand for diesel engines.
When choosing an oil, it is critically important to comply with the manufacturer's tolerances specified in the service book. Using oil with an incorrect additive package can lead to the destruction of the catalyst or particulate filter DPF.
- 🛢️ A complete oil change with a pallet removal allows you to remove up to 90% of the old product and wash the system from the sludge.
- 🛢️ Partial replacement (express method) leaves up to 30% of old oil in the channels and hydraulic compensators, which reduces the resource of the new portion.
- 🛢️ Black oil after 1,000 km is often a sign of good detergent properties, not necessarily poor quality.
Don't forget that oil-filter It is also a consumable and must be changed in each procedure. Cheap filters can not withstand the pressure or pass dirt, negating the benefits of fresh oil.
Cooling liquid: protection against overheating
The cooling system is often left unattended until the engine boils. However, antifreeze (or tosol) loses its anti-corrosion and lubricating properties over time. The liquid base, ethylene glycol or propylene glycol, is stable, but the additive package protecting aluminum radiators and cast iron blocks is depleted.
Mixing antifreezes of different colors and types (silicate, carboxylate, lobrid) is strictly prohibited without a complete washing of the system. A chemical reaction between different additive packages can lead to the loss of a gel-like sediment that clogs the thin channels of the radiator and the stainless air. chiller engine.
Why can't you put water in antifreeze?
Adding water reduces the boiling and freezing point of the liquid. In addition, ordinary tap water contains salts that will cause corrosion and scale on the walls of the pipes and radiator, which will lead to local overheating of the engine.
Replacement of coolant is recommended every 3-5 years or every 60-90,000 kilometers, depending on the type of product used. Before pouring a new portion, it is desirable to wash the system with distilled water to remove the remnants of the old composition and rust.
| Type of liquid | Basis | Term of service | Features |
|---|---|---|---|
| Traditional (Tosol) | Inorganic salts | 1-2 years | Low efficiency, forms a film |
| G11 (Green) | Silicates | 2-3 years | Protects but reduces heat transfer |
| G12/G12+ (Red) | carboxylates | 5 years | It only works in corrosion areas. |
| G12++/G13 (Violet) | Lobrid (Si-OAT) | 5 years | Compatible with eco-standards, long-lasting |
Constant decrease in the level without visible leaks may indicate a gasket burnout GBCs And antifreeze hits the cylinders.
Brake fluid: a safety issue
The braking system is perhaps the most important link in the car, and compromises are not acceptable. Brake fluid It has high hygroscopicity, that is, it actively absorbs moisture from the air. Even through microscopic pores in rubber hoses and seals, moisture penetrates into the system.
The presence of water in the brake fluid reduces its boiling point. With intense braking, for example, when descending from a mountain or a sharp maneuver, the liquid can boil. The resulting gas vapors are compressed, and the brake pedal falls into the floor, making stopping impossible.
- 💧 Replacement of brake fluid should be carried out strictly once every 2 years, regardless of mileage.
- 💧 Checking the water content can be carried out by special test strips or an electronic analyzer.
- 💧 You need to use a class liquid. DOT-4 or DOT-5.1 (not to be confused with silicone DOT-5) as specified in the manual.
When replacing brake fluid, be sure to use the pressure pumping device or ask for an assistant. Smoking often leaves air in the ABS/ESP calipers, which requires a complex scanner-smoking procedure.
The replacement procedure requires the consecutive pumping of all four circuits, starting with the wheel furthest from the main brake cylinder. A disruption of the technology will leave air bubbles in the system, and the brakes will work sluggishly and unpredictably.
⚠️ Attention: Brake fluid is aggressive to paint coatings and plastic. If you get on the body immediately wash it with plenty of water, otherwise the paint will soar.
Transmission oils: automatic transmission, manual transmission and gearboxes
Owners of cars with manual transmission (ICSW) is often considered to be filled for the entire life of the oil. That's a dangerous misconception. The wear products of gears and metal shavings gradually turn the lubricant into an abrasive porridge that kills the bearings of the shafts.
In automatic transmissions (DISTRIBUTION, variators CVT,robots DSG) the situation is even more serious. Here, the oil works as a working body of a hydrotransformer and is subjected to high thermal loads. Loss of fluid properties leads to kicks when switching, overheating and failure of frictions.
☑️ Checklist of oil change in automatic transmission
There are two methods of replacement: partial (slipped-zalyl) and hardware (complete displacement). Partial replacement only updates 40-50% of the volume, so it must be repeated every 15-20 thousand km to achieve the effect of a complete replacement. The hardware method changes 100% of the liquid, but requires caution on older boxes with high mileage, so as not to wash the dirt into the hydroblock.
For rear-wheel drive and all-wheel drive cars, it is equally important to change the oil in the car. gearbox and transfer-box. Heavy working conditions, impact loads and water (when forcing fords) quickly disable these nodes without proper lubrication.
Power steering and other systems
If you have a power steering system in your car (GURG), it also requires attention. Fluid ATF or PSF The liquid circulates under high pressure, heats up and ages. Signs of the need to replace are the hum of the pump when turning the steering wheel and darkening of the liquid in the tank.
It is also worth mentioning the liquid for the glass washer. Although it does not affect the mechanics, its quality is important for safety. Winter use of summer liquid or water will cause the system to freeze, the pipes to rupture and the pump motor to burn.
In modern air conditioning systems, compressor oil mixed with refrigerant also circulates. When repairing or in debt, a simple system may require refueling or oil replacement in the compressor, although this is rarely done routinely.
A comprehensive replacement of all fluids is the best investment in extending the life of the car, which pays off with the lack of expensive repairs of units.
Frequent questions about fluid replacement
Can you mix the antifreeze from different manufacturers if the color is the same?
No, color is not the standard. Different manufacturers can use different chemical bases for the same color. Mixing can cause a reaction and precipitation. It is better to add distilled water in an emergency than an unknown antifreeze.
Is it true that the automatic transmission oil does not need to change, if there are no problems?
It's a myth. By the time of the appearance of "problems" (kicks, jerks) in the box, irreversible processes of friction wear have already begun. Regular oil replacement is prevention, not treatment. Changes must be made according to the regulations or every 60,000. km.
How do you know if your brake fluid needs replacement without testing?
Visually, it should be transparent or light yellow. If the liquid in the tank has become dark brown or black, it should be changed immediately. Also a sign is a soft brake pedal after a long descent.
Should I wash the engine before changing the oil?
If you change the oil regularly and use a quality product, you do not need a flush. Washing oils or "five-minute" make sense only when switching from mineral water to synthetics or if the engine is visible obvious sludge and soda.