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2. Main bearing - Wikipedia

   en.wikipedia.org/wiki/Main_bearing

   A main bearing (center) of a Napier Deltic diesel locomotive engine (with its crankshaft removed) A main bearing is a bearing in a piston engine which holds the crankshaft in place and allows it to rotate within the engine block. The number of main bearings per engine varies between engines, often in accordance with the forces produced by the ...

3. Engine block - Wikipedia

   en.wikipedia.org/wiki/Engine_block

   In an internal combustion engine, the engine block is the structure that contains the cylinders and other components. The engine block in an early automotive engine consisted of just the cylinder block, to which a separate crankcase was attached. Modern engine blocks typically have the crankcase integrated with the cylinder block as a single ...

4. Tunnel crankcase - Wikipedia

   en.wikipedia.org/wiki/Tunnel_crankcase

   A tunnel crankcase, tunnel crankshaft or disc-webbed crankshaft [1] is a design feature of a piston engine where the main bearings that support the crankshaft within the crankcase form the largest diameter of any part of the crankshaft and are larger than the crank webs. This requires a crankcase with a large tunnel instead of cross web ...

5. Crankshaft - Wikipedia

   en.wikipedia.org/wiki/Crankshaft

   Crankshaft, pistons and connecting rods for a typical internal combustion engine Marine engine crankshafts from 1942. The crankshaft is located within the engine block and held in place via main bearings which allow the crankshaft to rotate within the block. [3] The up-down motion of each piston is transferred to the crankshaft via connecting ...

6. Chevrolet big-block engine - Wikipedia

   en.wikipedia.org/wiki/Chevrolet_big-block_engine

   The engine block had 4.84-inch (123 mm) bore centers, two-bolt main bearing caps, a "side oiling" lubrication system (the main oil gallery located low on the driver's side of the crankcase), with full-flow oil filter, and interchangeable cylinder heads. Heads used on the high performance 409 and 427 engines had larger ports and valves than ...

7. Straight-six engine - Wikipedia

   en.wikipedia.org/wiki/Straight-six_engine

   Crankshaft with four main bearings. Crankshafts for straight-six engines usually have either four main bearings (i.e., a bearing in between each pair of crankpins and one at each end) or seven main bearings (i.e., a bearing between every crankpin): Large displacement and diesel engines typically use seven bearings to minimize crankshaft flex.