11217627030 BMW Bearingshell

These little guys are essentially the interface between your crankshaft and the connecting rods. They're these precision – made, usually shell – shaped pieces of metal, and they create a smooth, low – friction surface for those parts to spin on. They don’t have moving parts themselves, they provide the smooth movement. They're usually made of a combination of materials, often with a softer layer on the surface to actually absorb some of the load and wear. Basically, they allow the crankshaft and connecting rods to spin freely and efficiently within the engine block. The crankshaft turns, the connecting rods move up and down, and those shells ensure everything does that without grinding or seizing. They’re a critical part of the bottom end of your engine, handling a lot of stress and force from combustion. You’ll find them in the main bearings supporting the crankshaft and rod bearings connecting the rods to the crankshaft. If these bearings go bad, it’s a big deal. Think of them as acting like a shield protecting the crankshaft and the block itself from direct metal – on – metal contact. If that shield fails, you'll quickly wear out very expensive components. You’ll notice if one is failing because you’ll likely get a knocking sound from the engine, especially under load. It’s usually a sign of low oil pressure, or just wear and tear over time. Ignoring it will lead to serious engine damage, and potentially a complete engine failure. You can find replacements for most makes and models over at Fixparts Online, and it’s always best to replace them in sets to ensure balanced performance. Year-round reliability: Bearing Shell (MPN 11217627030) includes a 12-month warranty!

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