What are the causes of oil burning in Renault 465 engine?
2 Answers
There are three main reasons for oil burning in Renault 465 engine. The following is a detailed introduction about these three reasons: 1. Using engine oil with poor quality or viscosity grade that does not meet the requirements: Low-quality engine oil will lead to increased wear. In addition, if the oil viscosity is too low or too high, it will cause poor engine lubrication, increase the wear of piston rings and cylinder walls, reduce sealing performance, and result in oil burning. 2. Excessive clearance between piston rings and cylinder walls: Improper installation of piston rings or poor sealing will allow oil on the cylinder walls to enter the combustion chamber, causing oil burning. In addition, poor sealing performance of the valve seal ring, damage to the crankcase forced ventilation valve (PCV), or blockage of the crankcase ventilation port, which increases the pressure in the crankcase, will cause oil to enter the cylinder along with the crankcase gas and participate in combustion. 3. Excessive oil filling leading to oil burning: When the oil filling exceeds the midline, due to the excessive oil pressure, the part of the engine lubrication process that relies on splash lubrication will excessively enter the combustion chamber and burn.
The Renault 465 engine burning oil is something I've encountered several times. It's probably due to severe piston ring wear—when the rings get stuck or break, oil can sneak into the combustion chamber and burn. Worn valve stem seals are another common culprit; the rubber seals become brittle over time, letting oil seep through. Issues with the crankcase ventilation system can also cause unstable pressure, blowing oil into the intake manifold. I've noticed many owners neglect maintenance, using low-quality oil or skipping oil changes, which accelerates wear. It's crucial to check the dipstick regularly. If oil consumption is fast, there's blue smoke from the exhaust, or fuel efficiency drops, head to a professional shop immediately. Delaying repairs can lead to fouled spark plugs or a damaged catalytic converter, costing a fortune to fix. Remember, good-quality oil and timely maintenance can slow these problems down—stay vigilant in daily use.
