Increased oil consumption in the engine
Often motorists are faced with the problem of increased oil consumption in the engine.
The reasons can be very different. To deal with this problem, we first determine what consumption is considered normal and why the engine needs oil in general.
When the engine is running, some of its parts experience significant friction, which leads to a significant increase in temperature. In such conditions, parts would fail very quickly. Due to thermal expansion, they would simply jam. For this, they came up with the idea of using an oil circuit, which reduces frictional resistance.
For optimal performance, the oil must be in such a state as to create the necessary layer between the parts, but not lose fluidity. This ability is measured by the viscosity coefficient. A lot depends on this indicator, including oil consumption.
During engine operation, part of the oil settles on the walls of the combustion chamber and burns along with the fuel. This process is called fading. This is fine. The only question is how much oil should be spent on waste? Everything is individual here and depends on the power and mode of operation of the car (the higher the speed, the more oil will burn).
Causes
The true cause of increased oil consumption is difficult to diagnose. Let's look at some of the most popular reasons:
Leakage of oil. It is necessary to replace all sealing parts - gaskets and seals. There are several characteristic places where this problem occurs most often:
- If you notice oil leaks on the engine housing - the reason is a loose fit of the valve cover, you need to replace the gasket.
- If foam is visible on the inner surface of the neck cover, the reason is the depressurization of the gasket between the cooling system and the working cylinders. Coolant entering the oil can cause serious damage.
- Oil outside the engine can also appear as a result of damage to the cylinder head gasket (main cylinder block). In modern engines, there are two of them, like the cylinder head.
- The inside of the crankcase with oil stains and a puddle under the engine indicate a problem with the camshaft and crankshaft oil seals.
- After removing the crankcase protection, oil stains can sometimes be found on the lift. Then it is worth replacing the pan gasket.
- Oil leaks from the bottom of the engine, near the gearbox, indicate a problem with the rear crankshaft oil seal. The gearbox needs to be removed and replaced.
- The cause of the leak may be the oil filter, or rather, its gasket. It's easier to replace the filter completely.
A black edge at the end of the exhaust pipe and blue exhaust smoke indicate the formation of excess carbon deposits in the engine cylinders.. The vodi.su portal draws your attention to the fact that you can only diagnose the exact cause by opening the block.
There are several secrets that will help to avoid premature opening of the engine:
- The viscosity of the oil is chosen incorrectly - this is the first reason for increased consumption. Both too high and too low viscosity leads to overspending. The solution is to follow the manufacturer's recommendations. Try using a higher viscosity oil or switch to a semi-synthetic from the same manufacturer.
- Temperature differences and incompatibility with some types of engine oil are the cause of wear on valve stem seals. By changing the engine compression, you can determine the degree of such wear, and then very indirectly. We have to act empirically, replacing this part.
- Worn piston rings can also cause increased fumes. The best way out is replacement. As a temporary measure, higher engine speeds may help. Keep the tachometer near the red zone 2-3 km.
Turbine failure can also cause increased consumption due to oil entering the engine cylinders through the fuel injection system.
Engine cylinder wear is the last factor. In this case, the flow increases gradually. Overhaul and further compliance with all operating recommendations will help. However, here the opinions of experts differ.
Many do not advise making capital, just replace the valves and monitor the flow rate, adding oil as needed. This measure is temporary, but a major overhaul is not a fact that will help. The best solution is to replace the engine or car.
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