BMW 1 3 5 Series E81 E90 F10 F20 F30 Hydraulic Cam Follower Compensating Element

BMW Series 1, 3, and 5 Hydraulic Valve Lifter (cam follower, compensating element) is a precision timing component responsible for stable transfer of motion from the camshaft to the valves. Thanks to BMW's factory design and preservation of original geometry, it ensures proper valve clearance compensation and smooth engine operation. This solution is intended for users seeking a proven OEM part for servicing the engine head in BMW E81, E90, F10, F20, F30 models.

Specifications and technical data

• SKU: 8679835
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8679835
• Substitutable numbers: 11338679835, 8679835, 11338614951, 8614951
• Category: Other Engine Parts

Purpose and Function in BMW Engines

The hydraulic valve lifter in BMW Series 1, 3, and 5 engines is responsible for automatic valve clearance adjustment, which reduces timing noise and supports smooth, predictable engine operation. This component works directly with the camshaft and valves, maintaining proper contact between the cam lobe and the valve stem under various load and temperature conditions.

Using an original BMW solution allows for maintaining:

• stable timing system operating parameters across the full RPM range,
• correct cylinder filling with the mixture,
• reduced risk of knocking and unwanted vibrations in the cylinder head,
• consistency with factory engine control unit maps.

Benefits of Using an Original BMW Part

Using an original BMW hydraulic valve lifter to replace a worn part restores the correct operation of the timing mechanism without altering the cylinder head's construction. The product is designed as an OEM part, which means:

• precise fit to the cylinder head seats and valve guides,
• preservation of factory dimensional tolerances,
• compatibility with the factory engine lubrication system,
• possibility of installation in place of the old lifter without modifications.

For the user, this means easier diagnostics and servicing and the ability to maintain the engine within the manufacturer's specified parameters, which is particularly important in modern BMW engines with precise valve control.

Condition, Origin, and Service Application

The offered part comes from the group of original BMW parts and is classified as used, making it an attractive solution for budget cylinder head repairs, partial overhauls, or individual lifter replacements. This type of component is often used for:

• eliminating knocking and rattling sounds in the upper engine area,
• timing system servicing after mileage requiring cylinder head inspection,
• local repairs after engine overheating,
• cylinder head refurbishment in workshop conditions.

Choosing an original hydraulic lifter allows for maintaining consistency with other timing system components, such as the camshaft, rocker arms, or valves, which is important for the durability of the entire assembly.

Integration with Other BMW Components and Technical Knowledge

For extensive engine work – especially on high-performance or heavily used vehicles – it is worth paying attention to the completeness of the timing system, the condition of the camshafts, guides, and valve springs. For comparison of design solutions used in other premium brands and a better understanding of differences in engine construction, an article describing Audi RS performance engines and their components may be helpful: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?.

Related Components and Further System Expansion

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other parts from the same group, such as rocker arms, camshafts, or valve control elements, check the available parts in the Other BMW category.

This allows you to select a cohesive set of components from a single group, which simplifies servicing, reduces the risk of incompatibility, and helps maintain engine operating parameters at the manufacturer's specified level.