Engine oil coming out of the exhaust? Pay attention, the problem calls for caution and caution?

Engine oil coming out of the exhaust? Pay attention, the problem calls for caution and caution?
 The smoke rising and exiting from the exhaust of the car can be easily noticed, but the exit of drops of oil in a remarkable manner and in large quantities from the end of the exhaust pipe may not draw your attention, because it is difficult to notice it except through careful and follow-up.

The oil coming out of the exhaust pipe is a warning sign of a defect in your car, and the car must be checked by a professional technician.

The only way the oil can find its way out of the exhaust pipe is to enter the exhaust stream and from there to the end of the exhaust pipe.

When the oil reaches the end of the exhaust stream in the car, the color of the oil may look like a black liquid falling from the exhaust, but nevertheless, this case should not be confused with the scene of condensation or light water droplets mixed with black soot falling from the exhaust pipe.

Common reasons for oil coming out of the exhaust:

Oil can enter a car's exhaust system in several different ways:

1- Blockage of the valve (PCV):

The forced ventilation valve of the crankshaft box, which is responsible for returning a certain amount of combustion gases and fuel vapors and recycling them for the purpose of benefiting from the residues of fuel vapors accumulated inside the engine oil sump, and this method is considered as a venting and ventilation process for the accumulated vapors inside the oil sump.

A clogged valve will lead to pressure build-up inside the oil sump and make the process of controlling the non-leakage of engine oil into the engine cylinders very difficult, and the accumulated pressure can cause oil to appear in the air intake manifold, throttle body, or air intake tubes.

2- Damage to the engine head gasket:

It is very likely that engine oil will leak when damage and breakage occurs in the gasket, specifically between the engine cylinder and the engine oil flow port, and thus oil will leak into the engine cylinder, and part of this oil will burn, and the rest will come out with combustion residues from the exhaust pipe and exit in the form of black oil droplets Or you may notice a spot of oil and black soot behind the car

3- Suvan damage to the valve guide:

One of the functions of the valve guide is to prevent engine oil from passing behind the engine valve stem, but like any component of the engine, the valve guide is subject to wear and tear over time. This leads to oil leakage into the engine cylinders, often resulting in bluish-gray smoke. As a by-product, and in some severe cases, oil residues can be seen coming out of the exhaust.

4- Damage to the rubber rings around the valve stem head:

The function of these rings is to prevent oil from leaking through them into the engine cylinders. You may notice an important sign of this defect when starting the engine, as you notice gray smoke coming out of the exhaust, and after a short period of time, this smoke will gradually stop.

5- Suvan damage to the engine piston:

This includes the occurrence of a hole at the top of the piston, which leads to the exudation and displacement of the engine oil into the engine cylinders, and the presence of the hole leads to the leakage of vapors and oil through it to the engine cylinder, where part of this oil will be burned while the rest of the oil is expelled in the direction of the exhaust manifold through Open exhaust valves and from there to the exhaust pipe.

6 - A crack and crack in the engine cylinder block:

The cracks inside the cylinder heads and the engine block often lead to the loss of engine oil and its leakage into the engine cylinders and from there to the exhaust manifold through the exhaust valves.

7- Damage and breakage of the piston rings:

Usually, piston rings play a major role in maintaining pressure inside the engine and preventing oil from leaking into the engine cylinders. coming out of the exhaust.