Oil Separation & Breather System

When your CPV O-ring fails it causes a slow oil leak on the passenger side of the engine, making an oily mess that frequently resembles a rear main seal leak. Replacing the CPV with an upgraded o-ring ensures a long-term solution to this common problem. 

The factory o-ring over time fails from heat cycling and oil exposure due to the Buna rubber used in OEM o-rings, while the included Viton Fluoroelastomer is resistant to a much higher temperature to ensure prolonged life without leaking. 

Rein Crank Case Vent Hose is a high-quality replacement part designed to enhance the performance and longevity of your vehicle’s engine. Manufactured by Rein Automotive, this vent hose is built to withstand high pressures and temperatures, ensuring reliable crankcase ventilation. Engineered for a precise fit, it helps prevent harmful oil vapors from entering the intake manifold, improving overall engine efficiency. Available at Turner Motorsport, this vent hose is an ideal choice for drivers looking to maintain their vehicle’s performance and emissions standards.

• Designed for optimal crankcase ventilation, improving engine performance
• Reduces oil vapor contamination in the intake system, protecting engine components
• Made with durable materials to resist wear from heat and pressure
• Ensures precise fit and easy installation as a direct OEM replacement
• Helps reduce harmful emissions, supporting cleaner engine operation

Turner Motorsport offers the Rein Crank Case Vent Hose as a dependable solution to keep your engine running smoothly while meeting emissions regulations.

On M52/S52-equipped BMWs, the factory crankcase ventilation (CCV) system is a notorious weak link. Between brittle plastic corrugated hoses that crumble from heat soak and an internal cyclone diaphragm prone to tearing, a failing CCV leads to massive oil consumption, vacuum leaks, and that dreaded "howling" whistle.

This kit addresses these issues with all new components and hardware. Both oil separator hoses, the cyclone separator itself, the mounting grommet, and the retaining bolts are included. Servicing this system is guaranteed to restore performance lost as a result of worn CCV components.

Kit includes:

Cyclone Separator/Crankcase Pressure Regulator Valve High Performance Silicone Breather Hose Return Hose Mounting Grommet Hex Bolt (3)

The Rein Crank Case Breather Pipe is a high-quality replacement part designed specifically for BMW models, ensuring proper engine ventilation and maintaining optimal performance. This crucial component prevents pressure build-up in the crankcase, reducing the risk of oil leaks and protecting vital engine parts. Manufactured to meet or exceed OEM standards, the Rein Crank Case Breather Pipe guarantees a perfect fit and long-lasting durability. Available through Turner Motorsport, this pipe is the ideal solution for BMW owners looking to restore or upgrade their engine’s ventilation system.

• Designed for BMW models to ensure perfect fit and compatibility
• Prevents crankcase pressure build-up, reducing the risk of oil leaks
• Protects engine components from damage due to excess pressure
• Made from high-quality, durable materials for long-lasting performance
• Direct-fit replacement for easy and hassle-free installation
• Meets or exceeds OEM specifications for reliable engine performance

Upgrade your BMW’s engine ventilation system with the Rein Crank Case Breather Pipe, ensuring smooth performance and protecting against costly repairs.

The plastic hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the plastic components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, mounting grommet, and hardware.

Fits the following BMWs:
2000-2003 E39 BMW 530i

The engine crankcase breather hose is a vital part of the Positive Crankcase Ventilation (PCV) system, responsible for directing pressurized air from the engine crankcase to the air/oil separator, also known as the PCV valve. This separator removes oil vapors from the air, allowing the oil to return to the engine while feeding the filtered air back into the intake system to support efficient combustion.

As a byproduct of the combustion process, positive crankcase pressure naturally builds up in the engine. The breather hose operates under constant exposure to heat, pressure, and an air/oil vapor mixture, making it prone to wear and failure over time. Ensuring the breather hose is in proper working condition is crucial for maintaining engine performance, adhering to emissions standards, and preserving the functionality of the PCV system. Promptly replace this component at the first signs of damage or degradation to avoid further complications.

Due to weak rubber construction and exposure to heat, this vacuum hose may be brittle and/or broken.

Replace it with this high-quality piece from Bremmen Parts to ensure proper turbocharger functionality.

The rubber hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, mounting grommet, and hardware.

Fits the following BMWs:
1998-2003 E39 BMW M5