How To Install A Blow Off Valve On Evo 9 or Evo 8 | DIY Quick And Easy!

Introduction

This tutorial will guide you through the process of installing a blow-off valve (BOV) on an Evo 8 or Evo 9. Upgrading to a Greddy FV Blow-Off Valve can improve your vehicle's performance, especially if you're planning to increase horsepower in the future. Follow these steps for a quick and easy installation.

Step 1: Gather Necessary Tools and Equipment

Before starting the installation, ensure you have the following tools and equipment:

• Greddy FV Blow-Off Valve
• Socket set
• Wrench set
• Screwdriver (flathead and Phillips)
• Hose clamps
• Vacuum hose (if needed for your specific installation)
• Safety glasses and gloves for protection

Step 2: Prepare the Vehicle

1. Turn Off the Engine: Ensure your vehicle is parked on a flat surface and the engine is off.
2. Disconnect the Battery: To prevent any electrical issues, disconnect the negative terminal from the battery.

Step 3: Remove the Stock Blow-Off Valve

1. Locate the Stock BOV: The stock blow-off valve is typically mounted on the throttle body.
2. Unclip the Vacuum Hose: If your stock BOV has a vacuum line, carefully unclip it.
3. Unscrew the Stock BOV: Use the appropriate socket or wrench to remove the bolts securing the stock BOV. Keep the bolts for the new installation.
4. Take Out the BOV: Remove the stock blow-off valve from the mounting location.

Step 4: Install the Greddy FV Blow-Off Valve

1. Position the New BOV: Place the Greddy FV Blow-Off Valve into the same position where the stock unit was located.
2. Secure the BOV: Use the saved bolts to secure the new BOV in place. Tighten them evenly to ensure a good seal.
3. Reconnect the Vacuum Hose: If your new BOV requires a vacuum line, attach it securely.

Step 5: Reconnect the Battery and Test

1. Reconnect the Battery: Place the negative terminal back on the battery and tighten it securely.
2. Start the Engine: Turn on your vehicle and let it idle for a few minutes.
3. Check for Leaks: Listen for any hissing sounds that may indicate a vacuum leak. If everything sounds good, you're ready to go.

Conclusion

You've successfully installed a Greddy FV Blow-Off Valve on your Evo 8 or Evo 9. This upgrade can enhance your vehicle's performance, especially if you plan on increasing horsepower. Remember to check the valve periodically for proper function and any signs of wear. Enjoy your enhanced driving experience! If you have any questions or need further assistance, feel free to ask in the comments.