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Few drivers would think to touch the oil dipstick while the engine is running. However, sometimes it is worth pulling it out even with the engine running, especially
For an inexperienced car owner, it is most likely not at all clear: how such an absolutely inert part of the engine as the oil dipstick can signal anything other than the lubrication level in the engine. Nevertheless, the fact is clear: the presence of serious “problems” can be diagnosed using the dipstick. To do this, you need to “check the oil” while the engine is running. Also note that the oil filler plug on the valve cover can serve as a similar indicator of engine condition – if you loosen it again while the engine is running.
How? Let’s talk! Let’s say the power unit is working, the hood is open and we try to pull the oil dipstick out of the well (or unscrew the oil filler cap). With a normally functioning engine, this can only be done with little effort. The fact is that the crankcase ventilation system creates a slight vacuum in (sorry for the repetition!) the engine crankcase and under the valve cover.
This is done so that the gases that break through (in minimum volumes is normal) from the combustion chambers do not accumulate in the cavities of the engine, but are sent directly to the intake manifold. To get back into the cylinders and finally fly into the exhaust pipe. A special valve is responsible for creating this “suction”.
The most important part is a diaphragm that controls the vacuum level in the crankcase. Over time, it can malfunction and even open the valve, causing uncontrolled lubricant to be sucked from the engine into the combustion chambers. Blue smoke will suddenly begin to flow from the exhaust pipe, oil will appear in the air filter, the engine will begin to “eat” it, as if the cylinder-piston group has completely come to an end.
But! If, despite all this, while the engine is running, it is very difficult to pull out the oil dipstick, as if someone were holding it at the other end, the owner of the car can breathe a sigh of relief: the “overhaul” of the engine will be canceled, only a cheap crankcase ventilation valve needs to be repaired or replaced.
It is much worse if, on the other hand, the oil dipstick tries to crawl out of its well on its own. Yes, maybe it’s all in the same valve: it got clogged and the gases started flowing into freedom wherever they could. And the increased pressure in the crankcase pushes the dipstick out.
But much more often such symptoms indicate that the engine piston rings are already seriously worn. So much so that a huge amount of exhaust gases penetrate through the crankcase, and the recirculation valve simply cannot cope with their quantity. That means an inevitable engine overhaul.
For an inexperienced car owner, it is most likely not at all clear: how such an absolutely inert part of the engine as the oil dipstick can signal anything other than the lubrication level in the engine. Nevertheless, the fact is clear: the presence of serious “problems” can be diagnosed using the dipstick. To do this, you need to “check the oil” while the engine is running. Also note that the oil filler plug on the valve cover can serve as a similar indicator of engine condition – if you loosen it again while the engine is running.
How? Let’s talk! Let’s say the power unit is working, the hood is open and we try to pull the oil dipstick out of the well (or unscrew the oil filler cap). With a normally functioning engine, this can only be done with little effort. The fact is that the crankcase ventilation system creates a slight vacuum in (sorry for the repetition!) the engine crankcase and under the valve cover.
This is done so that the gases that break through (in minimum volumes is normal) from the combustion chambers do not accumulate in the cavities of the engine, but are sent directly to the intake manifold. To get back into the cylinders and finally fly into the exhaust pipe. A special valve is responsible for creating this “suction”.
The most important part is a diaphragm that controls the vacuum level in the crankcase. Over time, it can malfunction and even open the valve, causing uncontrolled lubricant to be sucked from the engine into the combustion chambers. Blue smoke will suddenly begin to flow from the exhaust pipe, oil will appear in the air filter, the engine will begin to “eat” it, as if the cylinder-piston group has completely come to an end.
But! If, despite all this, while the engine is running, it is very difficult to pull out the oil dipstick, as if someone were holding it at the other end, the owner of the car can breathe a sigh of relief: the “overhaul” of the engine will be canceled, only a cheap crankcase ventilation valve needs to be repaired or replaced.
It is much worse if, on the other hand, the oil dipstick tries to crawl out of its well on its own. Yes, maybe it’s all in the same valve: it got clogged and the gases started flowing into freedom wherever they could. And the increased pressure in the crankcase pushes the dipstick out.
But much more often such symptoms indicate that the engine piston rings are already seriously worn. So much so that a huge amount of exhaust gases penetrate through the crankcase, and the recirculation valve simply cannot cope with their quantity. That means an inevitable engine overhaul.
Source: Avto Vzglyad
Donald Salinas is an experienced automobile journalist and writer for Div Bracket. He brings his readers the latest news and developments from the world of automobiles, offering a unique and knowledgeable perspective on the latest trends and innovations in the automotive industry.
