03C109675B Audi VALVE SEAL

These little guys are basically seals that go up on the valve stem – that’s the part that opens and closes the valve letting air and fuel into the engine. Their job is to keep oil from leaking down the valve stem and into the combustion chamber where it gets burned. They keep the oil where it needs to be – lubricating things inside the engine – and out of where it doesn’t. They’re a small part, but they’re inside the engine, working with the valves to manage how everything runs. They’re a critical piece of the valve train. Without good seals, oil gets past the valves and you’ll start seeing blue smoke coming from your exhaust, especially on deceleration. It's a part that doesn’t get talked about a lot, but it’s constantly working. When oil gets into the combustion chamber, it messes with the air – fuel mixture, lowers your gas mileage, and can eventually foul your spark plugs. It also creates carbon buildup which just makes things run poorly. Think of them as acting like a shield, preventing oil from escaping. You’ll notice if they’re going bad because you’ll see that blue smoke, and possibly even a drop in engine performance. If you're doing a valve job anyway, replacing these is always a good idea, prevents future headaches. You can find them pretty easily at places like Fixparts Online, along with a lot of helpful info on the repair process itself. It's one of those maintenance things that saves you bigger problems down the road. Why settle for less? Valve Seal (MPN 03C109675B) comes with a 12-month warranty!

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