A 90-degree valve cover breather is a crucial component in many engine designs, providing a vital path for crankcase ventilation. Its angled design offers significant advantages in terms of routing and space optimization, making it a popular choice for custom builds and situations where straight breathers are impractical. This comprehensive guide will delve into the specifics of these breathers, addressing common questions and concerns.
What is a 90 Degree Valve Cover Breather?
A 90-degree valve cover breather, also sometimes referred to as an angled PCV valve or a right-angle breather, is a specialized fitting that connects to your engine's valve cover. Unlike straight breathers, it features a 90-degree bend, allowing for more flexible routing of the crankcase ventilation system. This bend is essential when space is limited or when you need to reroute the breather hose to avoid obstructions or for aesthetic reasons. The breather itself allows for the safe venting of gases and pressure built up within the engine's crankcase, preventing damage and ensuring optimal engine performance. These breathers typically incorporate a filter to prevent contaminants from re-entering the engine.
Why Use a 90 Degree Valve Cover Breather?
The primary advantage of a 90-degree breather is its versatility in routing. In many engine bays, particularly in modified or custom applications, straight breathers simply won't work due to space constraints or the positioning of other components. The 90-degree angle allows you to neatly tuck the breather hose away, creating a cleaner and more organized engine bay. This is particularly important in applications where aesthetics are prioritized.
Beyond space-saving benefits, the 90-degree design can also improve airflow by allowing for a more direct and less restrictive path for crankcase gases. A poorly routed breather can hinder proper ventilation, impacting engine performance and potentially leading to damage.
What are the Different Types of 90 Degree Valve Cover Breathers?
90-degree valve cover breathers come in a variety of materials, sizes, and styles. Common materials include aluminum, plastic, and even billet aluminum for high-performance applications. Sizes vary to accommodate different valve cover threads and hose sizes. Some breathers incorporate integrated filters, while others require a separate filter to be added. The choice of breather will depend on your specific engine and application requirements.
How Do I Choose the Right 90 Degree Valve Cover Breather?
Selecting the correct 90-degree breather involves considering several key factors:
- Thread Size: Ensure the breather's thread size matches your valve cover's thread. This is crucial for a proper and secure fit.
- Hose Size: Choose a breather with a hose barb size compatible with your existing crankcase ventilation system. Improper sizing can lead to leaks or restrict airflow.
- Filter Type: Decide whether you want an integrated filter or a separate filter. Integrated filters offer convenience, while separate filters provide more flexibility in filter selection.
- Material: Aluminum breathers are generally more durable and heat-resistant than plastic, but they also tend to be more expensive.
How Do I Install a 90 Degree Valve Cover Breather?
Installation is typically straightforward, but it’s important to follow these steps:
- Prepare the Valve Cover: Clean the valve cover threads thoroughly to ensure a secure seal.
- Install the Breather: Carefully screw the breather onto the valve cover, ensuring it's tight but not over-tightened.
- Connect the Hose: Securely attach the breather hose to the breather's barb, ensuring a leak-free connection.
- Route the Hose: Route the hose to your preferred location, avoiding sharp bends or obstructions.
- Secure the Hose: Use hose clamps to secure the hose to prevent leaks and displacement.
What are the Potential Problems with a 90 Degree Valve Cover Breather?
While generally reliable, potential problems include:
- Leaks: Improper installation or damaged seals can lead to leaks.
- Restricted Airflow: Incorrect hose routing or a clogged filter can restrict airflow.
- Material Failure: Poor-quality materials can fail over time, leading to leaks or breakage.
By carefully selecting and installing a high-quality 90-degree valve cover breather, you can ensure the proper ventilation of your engine's crankcase, contributing to improved performance and longevity. Remember to always consult your vehicle's service manual for specific recommendations and procedures.
