How to Solve the Oil Burning Issue in Haval H9?
3 Answers
Here are the methods to address engine oil burning in vehicles: 1. Regularly change engine oil and oil filter: If signs of oil burning are noticed in the vehicle, frequently check the oil dipstick and replace the engine oil and oil filter as per the product manual's requirements. 2. Repair shop inspection: Once abnormal oil consumption is detected, it is necessary to take the vehicle to a repair shop for inspection. 3. Engine repair additive: Alternatively, use an engine repair additive to fill in the worn areas on the cylinder walls and cover the tiny pits on the piston rings. This can improve the sealing between the cylinder and piston rings, preventing oil burning. 4. Use fuel additives in combination: Fuel additives can also be used. Although carbon buildup in the engine is inevitable, it can be mitigated with some cleaning-type fuel additives.
My Haval H9 also experienced oil burning issues before, sharing my troubleshooting experience. First is to inspect engine internal wear, especially piston rings and valve stem seals - using a borescope to check cylinder walls for scoring marks is crucial. If oil consumption exceeds 0.5L per 1,000km, engine overhaul is likely needed. Recommend performing compression test first - if below 7bar, it basically confirms the need for major engine repair with piston ring replacement. Also pay attention to the crankcase ventilation valve (PCV), as clogging can cause oil vapor to enter intake manifold and burn. Sometimes replacing with an upgraded PCV valve can avoid major repairs. Finally, develop proper warm-up habits - aggressive throttle during cold starts particularly damages oil seals.
My mechanic friend taught me a three-step process to deal with engine oil burning: First, check for leaks. After starting the engine, use a flashlight to inspect the bottom of the engine. The turbocharger connections and valve cover gasket are the most common spots for oil seepage. Next, inspect the PCV valve. Remove the turbo intake pipe and check if there's oil on the pipe walls. If there is, replacing the PCV valve can solve the issue. Lastly, address internal engine problems. If the exhaust emits blue smoke and it's worse when the engine is warm than cold, it's likely due to aging valve stem seals. Replacing individual seals is much cheaper than a full engine overhaul. He specifically warned against using the wrong engine oil, as incorrect viscosity can increase oil consumption. I later switched to a 5W-40 full synthetic oil, which helped control the oil consumption.
