What Causes Oil Spray from the Engine Oil Filler Port?
3 Answers
The reasons for oil spray from the engine oil filler port are as follows: Failure of the crankcase ventilation valve: Firstly, oil spray from the engine exhaust pipe is likely due to the aging of the crankcase ventilation valve, or faults in the piston, cylinder liner, piston pin, and piston rings, which lose their original sealing effect, leading to the oil spray phenomenon. Severe wear between the valve stem and valve guide: Secondly, it could also be due to severe wear between the valve stem and valve guide, creating excessive clearance, resulting in oil leakage downwards. As for repairs, the damaged parts need to be identified and replaced accordingly.
The oil filler port of my car's engine keeps spitting out oil, which is really annoying. I think it might be because I accidentally overfilled it the last time I added oil myself. When the oil is too full and the engine heats up, it expands and spurts out directly, which is quite scary. Additionally, my car has been running for many years, and I suspect the piston rings are worn out, allowing gas to leak into the crankcase. When the pressure builds up, it pushes open the oil cap. If this isn't fixed promptly, the oil will splatter everywhere, making the engine dirty and even posing a fire hazard. That's why I immediately scheduled an inspection at the repair shop. By the way, regularly checking the oil dipstick can prevent most of these troubles—don't be careless like me. Remember this lesson; I think new drivers should be extra careful to avoid turning simple mistakes into major disasters. Now, I also keep an eye on overheating oil temperatures, as that can cause the oil to expand too. Addressing issues early saves money and hassle, especially since a major repair can cost thousands.
Engine oil spraying from the oil filler cap is quite common in my opinion. I suspect it's due to a faulty ventilation system in my car, such as a broken PCV valve causing high crankcase pressure, which leads to oil spraying when driving. If this gets clogged, oil gets forced out - really annoying. I also considered that the engine might be old with worn piston rings allowing blow-by gases to cause the splashing. I didn't pay attention before, and the sprayed oil corroded engine components, costing me unnecessary repair money. I recommend having a professional mechanic test crankcase pressure with a pressure gauge - it's cheap and quick. Develop regular inspection habits, like checking oil level monthly and keeping it below the maximum mark to prevent such oil spraying incidents. Expanding on this, oil spraying isn't just messy - it indicates internal engine problems. Delaying repairs could damage the entire system and reduce vehicle lifespan. I must remind everyone not to underestimate this issue.
