What Causes Oil Burning in the VV7?
3 Answers
Below are the specific reasons for oil burning in the VV7 engine: 1. Valve Oil Seal: The valve is designed to prevent oil from leaking into the combustion chamber. However, over time, it can wear out or age, severely affecting the valve's sealing performance and leading to oil burning. 2. Excessive Piston Clearance: With prolonged use of the vehicle, carbon deposits from incomplete combustion can accumulate on the piston rings. If not cleaned regularly, this can enlarge the gap between the piston rings and the cylinder wall, allowing oil to enter the combustion chamber and cause oil burning. In severe cases, it may even lead to engine seizure. 3. Driving Habits: Frequent rapid acceleration and prolonged high-speed driving can damage the lubricating oil film, resulting in poor engine lubrication and wear on certain components, which may also contribute to oil burning. 4. Excessive Engine Oil Level: If the engine oil level is too high and exceeds the maximum mark, the excess oil can easily enter the combustion chamber (due to excessive internal pressure), forming sticky carbon deposits.
I've found several common reasons why the VV7 tends to burn engine oil. First, it could be piston ring failure where compromised sealing allows oil to seep into the combustion chamber and burn. Alternatively, aged valve stem seals may leak oil into the cylinders during acceleration. The turbocharger is another critical component - damaged seals here can let oil infiltrate the exhaust system. Oil burning manifests as blue exhaust smoke, surging fuel consumption, and sluggish performance. Left unchecked, it may clog the catalytic converter, leading to costlier repairs. My advice: regularly check dipstick oil levels, don't wait until depletion. Use premium full-synthetic oil during maintenance to mitigate issues. For peace of mind, visit a 4S shop for compression tests before minor issues escalate into major overhauls.
As someone who has been following cars for a long time, I believe the VV7's oil burning issue is mostly caused by engine component wear. Worn or unsealed piston rings allow oil to enter the combustion chamber and burn; damaged valve stem seals can also leak oil inside. For turbocharged cars, if the turbo bearing seals fail, oil mixes into the exhaust and burns. This can cause blue smoke, unexplained increased oil consumption, or unstable idling. In severe cases, it leads to engine overheating and carbon buildup, damaging the car and wasting fuel. I usually advise owners to change the oil regularly, use the manufacturer-recommended grade, and avoid unnecessary engine modifications. If these symptoms appear, get a professional diagnosis immediately and replace parts as needed to prevent bigger issues.
