Table of Contents
Installing Cosworth connecting rods on a Subaru EJ20 engine can enhance performance and reliability. This guide will take you through the step-by-step process of installation, ensuring you achieve optimal results.
Tools and Materials Needed
- Cosworth connecting rods
- Subaru EJ20 engine
- Torque wrench
- Socket set
- Engine stand
- Oil for lubrication
- Clean rags
- Safety goggles
- Gloves
Preparation
Before starting the installation, ensure that you have a clean workspace and all tools readily available. Safety gear, such as gloves and goggles, should be worn at all times.
1. Remove the Engine
Begin by removing the Subaru EJ20 engine from the vehicle. Disconnect all electrical connections, hoses, and mounts. Carefully lift the engine out and place it on an engine stand for better access.
2. Disassemble the Engine
Remove the engine components that obstruct access to the connecting rods, including the intake manifold, exhaust manifold, and oil pan. Take care to keep track of all bolts and components.
3. Remove the Old Connecting Rods
Using a socket set, carefully remove the bolts securing the old connecting rods. Gently tap the connecting rods to release them from the crankshaft. Make sure to keep the crankshaft and pistons in good condition during this process.
Installing Cosworth Connecting Rods
4. Prepare the New Connecting Rods
Take the Cosworth connecting rods and inspect them for any damage. Apply a thin layer of oil to the bearings and the connecting rod surfaces to ensure smooth installation.
5. Install the New Connecting Rods
Align the new connecting rods with the pistons and crankshaft. Gently slide the rods into place, ensuring they fit snugly against the crankshaft. Be careful not to damage any components during this process.
6. Secure the Connecting Rods
Using a torque wrench, tighten the bolts on the connecting rods to the manufacturer’s specifications. This step is crucial for ensuring the integrity of the installation. Follow the recommended torque sequence for even distribution of pressure.
Reassembling the Engine
7. Reinstall the Oil Pan
Once the connecting rods are secured, reinstall the oil pan. Make sure to use a new gasket to prevent leaks. Tighten the bolts to the specified torque settings.
8. Reattach Engine Components
Reattach all previously removed components, including the intake and exhaust manifolds. Ensure all connections are secure and that no parts are missing.
9. Reinstall the Engine
Carefully lower the engine back into the vehicle. Reconnect all electrical connections, hoses, and mounts. Double-check that everything is secure before proceeding.
Final Checks and Testing
10. Perform a Pre-Start Check
Before starting the engine, conduct a thorough check of all fluid levels, connections, and components. Ensure that there are no leaks and that everything is in place.
11. Start the Engine
Start the engine and listen for any unusual noises. Allow it to idle for a few minutes, checking for leaks or issues. Monitor the oil pressure and temperature to ensure everything is functioning correctly.
12. Test Drive
Once the engine has been running smoothly, take the vehicle for a test drive. Pay attention to performance and any potential issues that may arise. If everything feels right, the installation is complete!
Conclusion
Installing Cosworth connecting rods on a Subaru EJ20 engine is a rewarding project that can significantly improve performance. By following these steps carefully, you can ensure a successful installation and enjoy the benefits of enhanced power and reliability.