The Toyota Highlander Oil Cooler aids in maintaining the proper viscosity and protective characteristics of the engine lubricant of the Toyota Highlander. The Oil Cooler located in the cooling system allows engine oil to flow through passages that are surrounded by engine coolant, which transfers heat to the liquid. The coolant then releases that heat through the radiator. The Oil Cooler utilizes coolant flow to increase the lubricant's temperature after the engine starts. It also helps to limit maximum temperatures that are reached when towing or climbing a steep grade. When the Oil Cooler side gets clogged or corroded, the efficiency of the Oil Cooler decreases or it develops leaks that can cause oil and coolant contamination. According to Toyota, it is advised that you maintain the cooling system to inspect the cooler performance frequently. When the Oil Cooler works properly, it will support consistent operating temperatures. This will assist in the lubrication of the Highlander. Overall, a functioning cooler will ensure reliability. Constantly controlling temperature is particularly important during prolonged Highlander load conditions.
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