04E109675 Audi valve guid

These little guys are basically bushings – think of them like sleeves – inside your cylinder head. Their job is to keep your valve stems properly aligned as the valves move up and down. They guide the valve, making sure it goes straight and seals properly. They control the valve’s movement and prevent it from wobbling or drifting. They’re a critical part of the valvetrain – that whole system that controls how air and fuel get into the engine and exhaust gets out. Everything hinges on those valves opening and closing at exactly the right time, and the valve guides are what make that precise movement happen. They’re located inside the cylinder head, one for each valve. If these wear out or get damaged, you’ll notice it. You’ll likely have valve seal issues which can lead to oil burning – you’ll see blue smoke coming from your exhaust. You'll also lose compression, meaning less power and potentially a rough idle. If they get really bad, the valves can actually make contact with the pistons, which is a major problem. They act like a shield, protecting the valve stem and the cylinder head from wear. Replacing them is part of a good valve job, and you can often find them at places like Fixparts Online, but it’s generally a job best left to a mechanic since it requires removing the cylinder head. Invest in longevity: Valve Guide (MPN 04E109675) comes with a 12-month warranty!

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