Why is there engine oil in the turbocharged valve of the Daewoo 498?
2 Answers
Engine oil in the turbocharged valve of the Daewoo 498 is caused by oil leakage from the turbocharger. Turbocharger composition: The turbocharger is a key component of a turbocharged diesel engine, generally consisting of a turbine housing, center housing, compressor, etc. Exhaust pipe connection: The turbine housing is connected to the diesel engine's exhaust pipe, the compressor is connected to the diesel engine's intake pipe, and the center housing is connected to the diesel engine's lubrication system. Turbocharger inspection: The pressure values at both ports of the turbocharger must reach a relatively balanced value to ensure no oil leakage occurs during operation. Otherwise, pressure imbalance on either side of the turbocharger will cause the engine oil in the center housing to leak to the other side. Turbocharger connection: When the compressor and turbine ends of the turbocharger are connected to the center housing, the center housing inside the turbocharger will be filled with lubricating oil at normal pressure after the engine starts. Turbocharger sealing ring: The turbocharger is equipped with a sealing ring. When the pressure difference between the compressor and turbine ports is relatively zero, the lubricating oil in the center housing will be forced to flow back to the oil pan through the turbocharger's return oil line via the cylinder block, under the action of the sealing ring and the gravity of the lubricating oil.
I've been driving diesel vehicles for over a decade and have encountered situations where the turbocharged valves of the Deutz engine had engine oil leakage. The common cause is the aging or failure of the oil seal inside the turbocharger, allowing oil to seep into the intake pipes. Sometimes, after prolonged driving, the turbo spins aggressively, and parts wear out quickly under high temperatures. My car experienced this once, emitting blue smoke at idle, and upon inspection, the turbo seal was found cracked. It's crucial to repair it promptly; otherwise, excessive oil entering the combustion chamber can lead to heavy carbon buildup, resulting in reduced engine power and increased fuel consumption. I recommend first checking for severe oil stains at the turbo connections—replacing the seals usually does the trick, a minor fix costing around a hundred bucks. Additionally, using full synthetic oil for maintenance and not neglecting air filter replacements can help prevent such issues. Don't procrastinate if this happens; delaying can lead to more expensive engine overhauls.
