What are the causes of oil leakage in Great Wall engines?
3 Answers
Great Wall engine oil leakage causes are: 1. Improper engine assembly, insufficient surface cleaning, damaged or displaced sealing gaskets; 2. Sealing components not installed according to specified procedures, improper installation; 3. Excessive lubrication oil or incorrect oil type added; 4. Product quality issues; 5. Prolonged engine usage; 6. Excessive pressure difference between inside and outside the engine; 7. Bent or deformed component mating surfaces or damage caused by external forces. Great Wall Motors is a Chinese SUV manufacturing brand. Taking the Great Wall Haval M4 as an example, its body dimensions are 3961mm in length, 1728mm in width, and 1617mm in height, with a wheelbase of 2383mm. In terms of external configurations, the Great Wall Haval M4 comes standard with front and rear fog lights and frameless wipers as its highlights, which also reflects the consistent characteristics of Great Wall Motors in vehicle configuration.
I've encountered engine oil leaks from Great Wall Motors vehicles several times, mainly due to aging seals. Components like oil pan gaskets or valve cover gaskets tend to harden and deform after a few years of use, and leaks often start from these areas. If bolts aren't tightened properly, driving vibrations can loosen them, causing oil to seep out. Worn oil seals are another common factor, especially crankshaft seals which are more prone to failure under high temperatures. Sometimes, using substandard replacement parts during repairs or misaligned gasket installations can also lead to oil leaks. Don't underestimate these small drips - accumulated leaks not only increase oil consumption but also pollute the environment and may even cause fires. My usual practice is to immediately check oil levels when spotting oil stains on the ground and promptly visit repair shops to replace seals. Delaying repairs can cause greater engine damage, making subsequent repairs more expensive and complicated.
As a frequent driver, I believe that oil leaks in Great Wall engines often stem from daily usage. For example, after long-distance driving, the engine overheats, causing the sealing materials to expand and contract, becoming brittle. Or, inadequate maintenance, such as not changing the oil for a long time, leads to increased impurities that erode the gaskets. The quality of the oil seals is also crucial; if the supplier uses substandard rubber, problems can arise within 10,000 to 20,000 kilometers. Loose screws should not be overlooked either, as failing to check them properly during maintenance can easily result in leaks. When leaks occur, timely action is essential. I once tried tightening the screws myself, but it didn’t help much—seeking a professional shop is the right approach. For prevention, I change the oil every 5,000 kilometers and inspect the condition of the seals, which significantly reduces the risk of leaks and extends the engine’s lifespan, saving both hassle and money.
