BMW E90 E92 E93 M3 S65 Inlet Exhaust Outlet Camshaft Cyl 5-8 Set 7838188 7841167

BMW E90 E92 E93 M3 S65 Camshafts Cyl 5-8 Set is a specialized set of camshaft components designed for the S65 gasoline engine in the E90, E92, and E93 M3 models. The set includes camshafts responsible for precise valve control in cylinders 5-8, which is crucial for the stable high-revving operation of the V8 unit. By maintaining the factory cam geometry and proper operating characteristics, this set allows for the preservation of correct cylinder filling parameters and engine running smoothness.

Specifications and technical data

• SKU: 7838188-7841167
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7838188
• Substitutable numbers: 7838188, 11317838188, 7841167, 11317841167
• Fuel type: Petrol
• Category: Camshafts

Purpose and Compatibility

The presented camshaft set is designed for the S65 engine found in BMW M3 E90, E92, and E93 generations. It is responsible for actuating cylinders 5-8, one of the banks of the V8 engine, which directly impacts the smooth operation of the entire valvetrain. The design, based on manufacturer solutions, ensures proper fitment with original bearings, followers, and timing sprockets, without the need for modifications to other components.

Components from this group are particularly important for major overhauls, repairs following lubrication system failures, or when replacing worn camshafts, especially when symptoms such as rough idling, power loss, or incorrect valve timing occur.

Technical Characteristics and Role in the Engine

The Camshafts category includes components responsible for the mechanical control of intake and exhaust valves. In the S65 engine, running on gasoline, the precision of the cam profile is of particular importance due to the high RPMs and sporty characteristics of the unit. The use of appropriately selected camshafts in cylinders 5-8 allows for:

• maintaining proper valve timing synchronization between both V8 cylinder banks,
• preserving the factory power and torque delivery characteristics,
• minimizing the risk of excessive load on lifters and valve guides,
• reducing mechanical noise resulting from incorrect cam profile or wear.

For M3 S65 owners who expect stable high-RPM operation, a properly selected camshaft set is one of the key elements ensuring repeatable performance and predictable engine behavior.

Condition, Origin, and Benefits of Use

The offered set comes from the BMW line and is a used aftermarket part, allowing for economical repair without compromising the original design. For many users, this is a sensible compromise between cost and maintaining factory specifications, especially for specialized engines where the availability of new components can be limited.

Using original camshafts in the S65 engine brings tangible benefits:

• maintaining compatibility with factory engine control unit maps,
• no need for additional ECU tuning after replacing with stock profile components,
• easier diagnosis of potential faults due to known valvetrain operating characteristics.

Application in Service and Engine Overhauls

The camshaft set for cylinders 5-8 is particularly useful in situations involving localized damage to one cylinder head or uneven wear of the cams. This allows for replacing components on one side of the engine without affecting the entire system, reducing repair time and costs. In workshop practice, this solution is often chosen for:

• overhauls after seizure of parts of the valvetrain,
• repairs after valve-piston collisions in one of the cylinder heads,
• engine upgrades after prolonged track use.

For M3 owners looking to restore the performance of the S65 engine while maintaining its stock characteristics, this set provides a practical basis for further service work.

BMW Valvetrain Expansion

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional camshafts, components interacting with cams, or valve control components, check the available parts in the BMW Camshafts category.

If you want to better plan your car's service scope and are considering using aftermarket components, it is worth familiarizing yourself with the practical tips described in the article Replacing Body Panels with Used Parts – Can Salvaged Body Parts Look Like New?, which helps in making informed choices about used car parts.