Table of Contents
Installing HKS or Tomei camshafts in your Subaru WRX can significantly enhance performance. This step-by-step guide will walk you through the installation process, ensuring you achieve optimal results while keeping costs around $800.
Tools and Materials Needed
- HKS or Tomei camshafts
- Socket set
- Torque wrench
- Camshaft timing tool
- Engine oil
- Gasket sealant
- Shop manual for your WRX
- Safety glasses and gloves
Preparation Steps
Before starting the installation, ensure you have a clean workspace. Gather all necessary tools and materials. It’s advisable to read through the shop manual for your specific WRX model for detailed instructions and safety precautions.
1. Disconnect the Battery
Begin by disconnecting the negative terminal of the battery to avoid any electrical issues during the installation process.
2. Remove Engine Covers
Remove any plastic engine covers to gain access to the camshaft area. This may require a socket set to remove bolts.
3. Drain Engine Oil
Drain the engine oil to prevent spills during the installation. Use an oil pan to collect the old oil.
Removing the Old Camshafts
With the engine prepared, you can now focus on removing the old camshafts. Follow these steps carefully.
1. Remove Timing Belt or Chain
Using the camshaft timing tool, align the timing marks and remove the timing belt or chain. Be cautious to maintain the alignment for reinstallation.
2. Unbolt the Camshaft Caps
Unbolt the camshaft caps using the torque wrench. Keep track of the order of the caps and bolts for reassembly.
3. Remove the Old Camshafts
Carefully lift out the old camshafts from the cylinder head. Inspect the camshaft journals for any signs of wear.
Installing HKS or Tomei Camshafts
Now that the old camshafts are removed, you can proceed with installing the new HKS or Tomei camshafts.
1. Lubricate New Camshafts
Apply a thin layer of engine oil to the journals of the new camshafts to ensure proper lubrication upon startup.
2. Install New Camshafts
Carefully place the new camshafts into the cylinder head, ensuring they are seated properly in the journals.
3. Reinstall Camshaft Caps
Reinstall the camshaft caps in the same order they were removed. Use the torque wrench to tighten them to the manufacturer’s specifications.
4. Reinstall Timing Belt or Chain
Reinstall the timing belt or chain, ensuring that all timing marks are aligned correctly. This step is crucial for engine performance.
Final Steps
With the new camshafts installed, you can now complete the installation process.
1. Refill Engine Oil
Refill the engine with new oil, ensuring it meets the specifications required for your WRX.
2. Reconnect the Battery
Reconnect the negative terminal of the battery. Double-check all connections and ensure everything is secure.
3. Start the Engine
Start the engine and listen for any unusual noises. Allow it to idle for a few minutes while checking for leaks.
Conclusion
Installing HKS or Tomei camshafts in your Subaru WRX is a rewarding project that can enhance your vehicle’s performance. By following this step-by-step guide, you can complete the installation successfully and enjoy the benefits of improved engine efficiency.