BMW N20 320i Crankshaft | 3 Series 2.0L Petrol Engine Crank Spares

Description

Restore the smooth operational balance, high-torque durability, and precise mechanical timing of your twin-scroll turbocharged powerplant with this premium BMW N20 320i Crankshaft Core (Main Engine Crank Journal Assembly). Specifically forged and precision-ground for the highly popular N20B20 2.0-liter four-cylinder petrol engine platform (produced from 2011 through to 2017 across the F30/F31/F34 3 Series generations), this genuine factory-style crankshaft is the definitive replacement for engines suffering from severe bottom-end failure, spun main or big-end rod bearings, or deep oil-starvation scoring.

Please take note of the specific engineering architecture: the N20 engine crankshaft is a highly specialized, lightweight forged steel component designed with integrated counterweights to balance the natural secondary vibrations of a high-boost inline-four engine. Because the N20 engine utilizes a map-controlled oil pump and a complex dual-chain assembly (driving both the camshafts and the lower oil pump/balance shaft unit), any interruption in lubrication or timing chain guide wear can rapidly starve the crank journals of oil pressure. Sourcing this dedicated N20B20 core guarantees that your stroke profile, main journal diameters, and flywheel mounting bolt patterns line up with absolute micron-level factory accuracy.

Bottom-end engine damage is one of the most severe mechanical issues a vehicle can face. When an N20 engine experiences a spun bearing, the heat generated by the intense steel-on-steel friction quickly warps the crank snout, scores the smooth bearing surfaces, and can leave deep, un-machinable gouges on the rod journals. Attempting to weld or excessively grind a heavily damaged crankshaft beyond factory tolerances weakens the structural integrity of the steel, risking a catastrophic crank snap under high boost pressures.

Furthermore, running a scored or out-of-round crankshaft causes immediate loss of engine oil pressure, leading to chronic rod knock and terminal block failure. Swapping out your damaged crank core with this workshop-verified, standard-size factory component restores pristine hydrodynamic lubrication across your main bearings, ensures perfect connecting rod alignment, and eliminates destructive lower-engine vibrations.

Manufactured from high-strength forged steel alloy to withstand high combustion loads and thermal stresses, this crankshaft arrives thoroughly cleaned, micro-polished, and treated with a protective layer of rust-preventative storage oil. Trust TP German Auto Spares for fully verified, workshop-inspected BMW internal engine components, cylinder heads, pistons, camshafts, oil pumps, and timing spares that maintain the ultimate driving machine performance of your 3 Series.

Technical Calibration Note: This crankshaft is verified as a Standard/Standard (STD Size) core, meaning it has never been machined down or ground undersize. To complete a professional engine rebuild, your automotive machinist or assembly technician must install a fresh set of OEM-spec main bearings, big-end rod bearings, a new rear main crankshaft oil seal, and a brand-new timing chain/oil pump drive kit.

Key Features:

• Vehicle & Engine Compatibility: Tailor-fit exclusively for BMW 3 Series 320i models (F30 sedan, F31 touring, and F34 GT platforms) equipped with the 2.0L twin-scroll turbo N20 petrol engine from 2012 to 2017.

• Forged Steel Construction: Engineered to handle the high-torque output of turbocharged direct-injection configurations without flexing or experiencing structural fatigue.

• Standard Size Guarantee: Thoroughly micrometer-tested across all main and connecting rod journals to guarantee it sits 100% within factory-original standard dimensions.

• Flawless Keyways & Threads: Front snout keyways, timing gear drive interfaces, and rear flywheel mounting threads are inspected under magnification to ensure zero stretching or cross-threading.

• Magnetic Particle Inspected: Put through rigorous non-destructive workshop testing to ensure the steel matrix is completely free of internal stress fractures or hairline cracks.

• Condition: Excellent used/refurbished factory core; balanced, micro-polished, straightness-verified on a lathe, and ready for immediate engine reassembly.