Engine Oil Leakage Cure And Pit Avoidance

Engine oil leakage is a common problem for car owners, which not only causes oil loss and increases maintenance costs, but can also lead to fatal malfunctions such as engine overheating and cylinder pulling in severe cases. Many car owners tend to fall into the misconception of "more repairs, more leaks" during maintenance. To cure the oil leakage, it is necessary to first identify the root cause, avoid pitfalls, and then solve them targetedly.

1、 Identify the root cause first: common oil leakage locations and causes

Engine oil leakage is not a single fault, and the core causes are concentrated in three types of areas. One is the aging of sealing components, such as valve cover gaskets, crankshaft oil seals, oil pan gaskets, etc., which are easily hardened and cracked by high temperature and vibration for a long time. This is the main reason for oil leakage in old cars; The second issue is loose bolts, as vibrations during engine operation can cause the fixing bolts of parts such as the oil pan and oil filter base to loosen, resulting in gaps and leaks; The third is component damage, such as the oil pan being bumped and deformed, the cylinder body having sand holes, and the oil radiator being damaged. These types of faults are often related to external forces or manufacturing defects. Accurately locating the oil leakage point is a prerequisite for cure, which can be confirmed by observing the oil leakage traces and using fluorescent agents for detection.

2、 Key to avoiding pitfalls: Do not step on these three mines during maintenance

Many oil leakage problems become more serious as they are repaired, and the root cause lies in improper operation during maintenance. Firstly, it is necessary to avoid the pitfall of "only replacing seals without checking related components". Some repair shops, in order to save time, simply replace leaking gaskets, but ignore the problems of crankshaft blowby and uneven bolt stress that cause premature seal failure, resulting in another oil leak in the short term; Secondly, avoid the trap of "excessive use of sealant". Excessive application of sealant can block the oil passage and may cause secondary damage to the engine due to the detachment of glue. Standardized operation should ensure that the sealing surface is clean and dry, and apply according to the prescribed amount; Finally, avoid the misconception of using inferior accessories from the secondary factory. The material and dimensional accuracy of the secondary factory seals and oil seals do not meet the standards, and their service life is much lower than that of the original factory parts, which may seem cost-effective but actually require frequent repairs.

3、 Radical solution: Follow the three-step operation of "check replace verify"

To cure engine oil leakage, the process of "comprehensive investigation standard replacement acceptance confirmation" needs to be followed. The first step is to conduct a comprehensive investigation. In addition to confirming the location of the oil leak, it is also necessary to check whether the crankcase ventilation system and oil pressure are normal, and eliminate indirect causes; The second step is to standardize the replacement process, prioritizing the use of original or branded accessories. Bolts should be tightened to the specified torque, and the sealing surface should be cleaned before installation. If necessary, damaged components (such as deformed oil pans) should be replaced; The third step of acceptance confirmation is to add the specified model of engine oil after maintenance, start the engine and idle for 10-15 minutes, observe whether there are new leakage marks in the oil leakage area, and check whether the oil level is normal. In addition, regularly checking the oil level during daily maintenance and avoiding long-term high-temperature operation of the engine can effectively extend the life of seals and reduce oil leakage hazards.