What is the construction and purpose of crankshafts?

Crankshafts are mechanical components mounted in the lower part of the engine, supported by main bearings in the block. They consist of main journals, crank journals, counterweights, and surfaces interacting with the flywheel and pulley. Their purpose is to convert piston motion into rotational motion and transfer loads generated during mixture combustion.

What are crankshafts used for?

Crankshafts are used to transfer energy from the piston-connecting rod assembly to further elements of the drivetrain. In addition to generating rotational motion, they work with the timing system, belt accessories, and the flywheel. Without a properly selected shaft, the engine does not maintain proper operating culture, lubrication, and mechanical synchronization.

What is the construction and function of crankshaft bearings?

Crankshaft bearings are thin-walled sliding elements mounted between the shaft journals and the seats in the block or connecting rod. Their function is to maintain an oil layer, reduce friction, and stabilize the operation of the rotating shaft. The selection of bearings depends on the journal diameter, any potential grinding, and the engine version, so they should be verified together with the shaft.

How to properly select a crankshaft for a specific engine?

The most important thing is to compare the engine code, OEM number, and interchangeable numbers. It is also worth checking the fuel type, part condition, gearbox version, and compatibility with the flywheel or dual-mass flywheel. For units after an overhaul, the journal dimension and whether the shaft works with standard or oversized bearings also matter.

What symptoms may indicate a problem with the crankshaft or its interaction?

Typical symptoms include metallic knocking from the lower part of the engine, excessive vibration, oil pressure drop, and uneven unit operation under load. In practice, the cause may be the shaft itself, worn bearings, improper lubrication, or a problem with the position sensor signal wheel. Therefore, it is worth basing the diagnosis on measurements and part compatibility, not just on a single symptom.

How to take care of crankshafts after installation?

The basis is regular oil and filter changes, monitoring lubrication pressure, and using the correct mounting elements. After installation, you should verify alignment, operating clearance, and interaction with seals, the pulley, and the flywheel. It is also good practice to check the condition of the oil pump and oil channels before starting the engine.

Crankshafts

At Global Parts, we offer a wide selection of original used car parts, including crankshafts for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Each crankshaft we offer undergoes quality control to ensure you receive a top-quality product.

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VW Volkswagen Polo V 6R Engine Crankshaft 1.2 TSI CJZC 204EAM

€123.95

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Porsche Cayenne 9PA Crankshaft Position Sensor Control Unit 7L5905381

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Mercedes W177 W247 Petrol M282 Engine Cover Head Rocker Panel A2820100201

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Ford Transit Custom Mondeo Mk5 Vibration Damper Crankshaft Pulley GK2Q-6B319-BB

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Mini R55 R56 LCI R60 R61 N47N Vibration Damper Crankshaft Pulley 8511320

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Mercedes W205 OM654 Diesel Engine Crankshaft Crank Shaft Gear A6540302100

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Audi A4 S4 B9 3.0 TFSI Engine Crankshaft Petrol Shaft 06M105019AG

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Mercedes W203 W204 W212 M272 Petrol Engine Crankcase Knock Sensor A0041539028

€23.95

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Mercedes W176 W205 W212 W253 Engine Balance Shaft Housing OM651 A6510301372

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Jaguar XF250 Crankshaft Position Sensor 3.0 Diesel 9X2Q-6C315-AB

€23.95

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Land Rover Discovery 4 L319 Crankshaft Pulley Wheel 3.0 SDV6 LR067312

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€37.95

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Audi S5 8T Crankcase Breather Valve Oil Separator 079103464F

€47.95

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Mercedes CL203 W163 W203 M112.940 Crankshaft A1120302601

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Audi A3 S3 8Y TT TTS 8S 2.0 TFSI Crankshaft Chain Sprocket 06K105209Q

€94.95

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BMW E84 E89 F10 F11 F20 F25 F30 Vibration Damper Crankshaft Pulley 7597422

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Audi A6 C7 A7 4G Engine Crankshaft Crank Shaft 2.8 TSI Petrol CHVA 06E105101AE

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Mercedes CL203 M112 Camshaft Gear Pulley A1120500204

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Mercedes W177 A 180 Petrol Engine OM282 Crankshaft A2820310001

€284.95

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BMW E46 Engine Crankshaft N42B18 Petrol 316i 316ti 0142286

€142.95

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Audi A4 S4 B8 Crankcase Breather Hose Engine Pipe Line Oil Separator 06E103547F

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MINI BMW F20 F30 F45 F56 F55 Balance Shaft Gear Wheel B38 Manual 8602965

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BMW F10 F20 F21 F30 F31 N20 Crank Shaft Position Sensor 7595860

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BMW F40 F44 X1 F48 Crankshaft Pulley Vibration Damper B47 Diesel Engine 8588866

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Mercedes W204 W211 M156 Intermediate Sprocket Gear Wheel A1560501505

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Audi TT 8J Crankcase Breather Hose Engine Pipe Line Oil Separator 06H103495AC

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