What are the situations of engine oil leakage?
2 Answers
Since valve cover gaskets and oil seals are usually made of rubber products, they are prone to lose the plasticity and elasticity of the rubber material when working under alternating temperatures for a long time. Over time, they will harden or even break, and poor sealing will naturally lead to oil leakage. Other reasons: Another reason that can cause valve cover oil leakage is that the crankcase forced ventilation valve is blocked, causing the crankcase pressure to rise and releasing pressure from the valve cover gasket or other weak points, resulting in oil leakage. Specific reasons: Specific reasons still need to be checked and repaired in detail by contacting a 4S store.
After driving for so many years, I've seen quite a few cases of engine oil leaks, and there are several main reasons to share. First is the issue of aging oil seals, like the rear crankshaft seal or camshaft seal, which can crack and leak after prolonged use. Second is gasket failure, such as the valve cover gasket or oil pan gasket, which can deform and lose sealing effectiveness under high temperatures. Next, loose oil plugs or worn sealing rings can cause oil to seep out. Additionally, improperly installed or poorly sealed oil filters often lead to leaks. Lastly, cracks in the engine block, usually caused by collisions or corrosion, result in more severe leaks. I recommend regularly checking oil levels; if you notice oil stains on the ground or a burning smell, don’t delay—take it to a professional shop immediately. Otherwise, low oil levels can accelerate engine wear, leading to more expensive repairs and even component damage. During routine maintenance, pay extra attention to the condition of seals and use high-quality oil to prevent premature aging.
