Table of Contents
The Garrett G25-550 turbocharger is a popular upgrade for the BMW 335i, providing enhanced performance and efficiency. In this step-by-step tutorial, we will guide you through the installation process, ensuring you have all the information needed for a successful upgrade.
Tools and Materials Needed
- Garrett G25-550 Turbocharger
- Socket set
- Torque wrench
- Wrenches
- Screwdrivers
- Silicone gasket maker
- New gaskets
- Oil and coolant
- Shop towels
- Safety glasses
Preparation
Before beginning the installation, ensure that your workspace is clean and organized. Gather all tools and materials listed above. Make sure to wear safety glasses to protect your eyes during the process.
Step 1: Disconnect the Battery
Start by disconnecting the negative terminal of the battery. This will prevent any electrical issues during the installation process.
Step 2: Remove the Engine Cover
Using your socket set, remove the bolts securing the engine cover. Carefully lift the cover off and set it aside.
Step 3: Remove the Intake and Exhaust Components
Next, remove the intake pipe and any associated components. Disconnect the mass airflow sensor and any vacuum lines attached to the intake.
Once the intake is out of the way, proceed to remove the exhaust components. This includes the downpipe and any heat shields. Be cautious of any remaining exhaust gases.
Step 4: Remove the Old Turbocharger
With the intake and exhaust components removed, locate the old turbocharger. Disconnect the oil and coolant lines carefully. Use a wrench to remove the bolts securing the turbocharger to the manifold.
Step 5: Install the Garrett G25-550 Turbocharger
Before installing the new turbocharger, ensure that all mating surfaces are clean. Apply silicone gasket maker to the turbo mounting surface if recommended.
Position the Garrett G25-550 turbocharger onto the manifold. Secure it with the bolts, tightening them to the manufacturer’s specifications using a torque wrench.
Step 6: Reconnect Oil and Coolant Lines
Reconnect the oil and coolant lines to the new turbocharger. Ensure all connections are tight and free of leaks.
Step 7: Reinstall Exhaust and Intake Components
Reinstall the downpipe and any heat shields removed earlier. Make sure to use new gaskets where necessary to avoid exhaust leaks.
Next, reconnect the intake pipe and any associated components. Ensure that all connections are secure and that the mass airflow sensor is properly connected.
Step 8: Reattach the Engine Cover
Once everything is reconnected, place the engine cover back on and secure it with the bolts removed earlier.
Step 9: Reconnect the Battery
Reconnect the negative terminal of the battery. Ensure that all connections are tight and secure.
Step 10: Start the Engine and Check for Leaks
Start the engine and let it idle for a few minutes. Check for any oil or coolant leaks around the turbocharger and associated lines. If everything is secure, you are ready to take your BMW 335i for a test drive!
Conclusion
The installation of the Garrett G25-550 turbocharger on your BMW 335i can significantly enhance performance. By following this step-by-step guide, you can ensure a successful installation. Always remember to monitor your vehicle’s performance and check for any issues after the installation.