Audi TT 8N 1.8T Engine Crankshaft 06A105021

Audi TT 8N 1.8T Engine Crankshaft is a component from the Crankshafts category, designed for use in Audi power units powered by Diesel fuel. The used OEM crankshaft ensures factory geometry, proper rigidity, and the maintenance of engine operating parameters in accordance with the manufacturer's specifications.

Specifications and technical data

• SKU: 06A105021
• Mark: Audi
• Condition: Used
• OEM Part Number: 06A105021
• Substitutable numbers: 06A105021, 06A 105 021, 050105189B, 050 105 189 B
• Fuel type: Diesel
• Category: Crankshafts

Technical characteristics of the crankshaft

The presented crankshaft has been designed by the manufacturer for precise cooperation with the engine block, the crank-piston system, and the lubrication system. The construction ensures adequate fatigue strength, operational stability at high RPMs, and proper transmission of torque to the subsequent elements of the drivetrain.

The original design guarantees the maintenance of key dimensional tolerances for the main and connecting rod journals, which directly impacts proper oil pressure, engine refinement, and the reduction of torsional vibrations. As a result, the shaft provides a solid foundation for the overhaul or rebuilding of the power unit.

Application in a Diesel engine

The crankshaft is adapted for operation in an engine powered by Diesel fuel, where mechanical loads and combustion pressures are higher than in gasoline units. Appropriately selected material and the geometry of the arms and journals allow for safe operation across a wide range of loads, both during calm driving and dynamic use.

Thanks to the factory design, the shaft works with the stock lubrication and oil cooling system, which facilitates the maintenance of stable engine operating conditions and reduces the risk of seizure with proper service maintenance.

Benefits of using an original crankshaft

Using an original crankshaft in an Audi allows for the preservation of the power unit's factory operating parameters without the need for modifications to the block, bearings, or lubrication system. This solution is particularly beneficial during overhauls, where compatibility with other components and predictable engine behavior after assembly are essential.

The used OEM component is a good choice in situations where the existing shaft has been damaged, shows excessive journal wear, or deformation after seizure. This allows for an economical engine rebuild while maintaining a high level of reliability, provided that proper assembly, selection of bearings, and appropriate operating clearance are ensured.

Preparation for assembly and service recommendations

Before assembly, a standard workshop procedure is recommended: thorough cleaning of oil channels, inspection of radial runout, measurement of journal diameters, and selection of the correct bearings in accordance with the manufacturer's service documentation. Proper tightening of the main and connecting rod caps using the correct torque and tightening angles is crucial for the trouble-free operation of the crank system.

Replacing the crankshaft is a good time to verify the condition of the connecting rods, pistons, rings, and the oil pump so that the engine runs stably and smoothly across the full RPM range after assembly.

Related components and additional information

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as other shafts, crank-piston system elements, or components cooperating with the lower engine assembly, check the available parts in the Audi Crankshafts category.

For drivers interested in a broader approach to drivetrain maintenance and diagnostics of components cooperating with the engine, a practical guide regarding accessories may be useful – more information can be found in the article When is it worth replacing an alternator with a used one: a practical guide for drivers.