06B117021 Audi OIL COOLER

Basically, an oil cooler does exactly what the name suggests – it cools your engine oil. Engine oil picks up a lot of heat as it circulates, lubricating all those moving parts. The cooler takes that hot oil and runs it through a radiator – like setup, bringing the temperature down before it goes back into the engine. It’s a heat exchanger, really. It takes the heat from the oil and dissipates it into the air. It’s part of the lubrication system, naturally. You’ll usually find them in vehicles that work pretty hard – things like turbocharged engines, diesel trucks, or anything doing a lot of towing or performance driving. Those engines generate a lot more heat, and the standard oil cooler, or even just the oil pan acting as a heat sink, sometimes isn’t enough. It sits in the cooling system, often right behind the radiator, to get good airflow. Hot oil breaks down faster. Think of it like this – if you overheat something, it doesn’t last as long, right? Well, same thing with your oil. When oil gets too hot, it loses its viscosity, meaning it doesn't lubricate as well. This causes increased wear and tear on all your engine parts. The oil cooler acts like a shield, protecting your oil – and therefore your engine – from excessive heat. You’ll notice if one is failing usually because your oil temperature gauge will start reading higher than normal, or you might get a warning light. Fixparts Online carries a pretty good range of these, if you’re looking to replace one. Ignoring a failing oil cooler can lead to some seriously expensive engine repairs down the line, so it’s a good thing to address when you notice a problem. Audi stands behind its products: Oil Cooler (MPN 06B117021) has a 12-month warranty!

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