Audi A8L D4 3.0 TDI CBTA Head Rocker Valve Cover Right O/S 059103470AS

Audi A8L D4 3.0 TDI CBTA Head Rocker Valve Cover Right O/S is an original component from the Cylinder Heads group, designed for diesel engines in the luxury Audi sedan. The cover is responsible for tightly sealing the right side of the cylinder head, stabilizing the timing system operation, and ensuring proper engine oil flow. This used OEM component is a sensible choice for professional repairs or engine servicing when precise fitment and maintaining factory parameters are essential.

Specifications and technical data

• SKU: 059103470AS
• Mark: Audi
• Condition: Used
• OEM Part Number: 059103470AS
• Substitutable numbers: 059103470AS, 059 103 470 AS
• Location on the vehicle: Right
• Fuel type: Diesel
• Category: Cylinder Heads

Purpose and function in the engine system

The right-side valve cover in the Audi A8L D4 3.0 TDI CBTA operates directly in the cylinder head area, where it is responsible for:

• maintaining the tightness of the chamber above the valves and timing components,
• controlled discharge of oil vapors and gases from inside the cylinder head,
• protecting mechanisms against external contaminants,
• stable mounting of accessories designed for this side of the unit.

By maintaining the original geometry and mounting points, the cover works with factory seals and other cylinder head components, which facilitates trouble-free installation and the maintenance of proper diesel engine operating parameters.

Compatibility and fitment for the 3.0 TDI unit

The element was designed specifically for the 3.0 TDI CBTA unit in the Audi A8L D4 model, taking into account the characteristics of diesel engine operation: higher pressures, temperatures, and specific oil circulation. The appropriate shaping of the channels and internal surfaces of the cover supports:

• proper oil circulation within the cylinder head,
• maintaining stable lubrication conditions for timing components,
• reduction of leaks and seepage at critical connection points.

Precise fitment to the right side of the engine facilitates installation in the existing system without the need for modifications, which is particularly important for repairs in premium vehicles.

Characteristics of the used component

The cover comes from dismantling and is offered as a used part, which allows for reduced service costs while maintaining the manufacturer's original specifications. In practice, this means:

• retention of factory mounting points and seal shapes,
• compatibility with the stock cylinder head and engine accessories,
• possibility of use in professional repairs without interfering with the unit's construction.

Before installation, a standard service procedure is recommended: checking the contact surfaces, selecting a new gasket, and applying the appropriate tightening torques in accordance with the manufacturer's technical documentation.

Application in diesel engines and mounting area

The cover is designed for a compression-ignition engine, which is why its construction takes into account the specifics of diesel units – higher mechanical and thermal loads and more intensive operation of the lubrication system. The positioning on the right side of the vehicle determines:

• the layout of mounts relative to the cylinder head and body,
• routing of lines and potential accessories in the engine bay,
• service access during replacement or removal.

Proper identification of the mounting side is crucial for a correct repair – using the dedicated cover for the right side eliminates problems with fitment and tightness.

Support with selection and related parts

When selecting this valve cover, it is worth paying attention to the compatibility with the engine code and cylinder head configuration in your specific Audi A8L D4. In the event of an extensive repair of the cylinder head or the entire timing system, a good solution is to simultaneously replace the seals, mounting bolts, and other components working within this engine zone.

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 cylinder head housings, chamber covers, or additional housing elements, check the available parts in the Audi Cylinder Heads category.

For a broader perspective on the cost-effectiveness of using components from dismantling in advanced vehicle systems, you can use the advice contained in the article Stock vs. sports suspension – design differences and is it worth buying used suspension parts?, which discusses the practical aspects of choosing used parts in the context of durability and safety.