Is It Serious to Have Oil in the Coolant?
2 Answers
Having oil in the coolant is not a significant issue. It is quite normal to find floating oil or oil droplets in the coolant. However, if there is a large amount of oil, it is necessary to check whether the engine cylinder gasket is damaged. It could also indicate a problem with the oil cooler or filter. Main Components of Coolant: The main components of coolant are: 50% pure water, 40% methanol, and 10% other substances. Coolant Replacement Method: Drain the old coolant, then flush the fluid channels with clean water. Add clean water to the coolant reservoir, then continue filling the reservoir with water to allow it to continuously flow through the engine cooling system. Start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water draining from the reservoir may appear slightly pinkish. Continue adding clean water until the drained water runs clear. Note: Do not forget to remove the heater hose and drain the water from the heater core. After draining for about an hour, add the new coolant through the radiator hose to allow it to flow quickly into the radiator. Then, add another container of coolant to the reservoir until it is nearly full. Run the engine for about 10 minutes; during this time, the coolant level may drop slightly as air is purged from the system. Top up the coolant to the maximum mark "MAXT" on the reservoir.
Having oil in the antifreeze is no small matter and needs immediate attention. I once had this issue with my own car—the engine temperature skyrocketed, and it almost broke down. The cause was a damaged component inside the radiator that allowed engine oil or transmission fluid to mix in. Oil and water should never mix, as it can clog cooling passages, leading to engine overheating or even cylinder head gasket damage. If not fixed promptly, the car might stall on the road, and repair costs could skyrocket. I recommend checking if the antifreeze appears cloudy or has oil stains. If detected, take it to a professional shop immediately for system flushing and leak identification. Remember, never overlook minor anomalies while driving—safety comes first.
