How to Install a Mishimoto Oil Cooler on the Fa20 for Better Reliability

The FA20 engine, found in various Subaru and Toyota models, is known for its performance and efficiency. However, to enhance its reliability, especially under strenuous conditions, installing an oil cooler can be a game changer. In this guide, we will walk you through the steps to install a Mishimoto oil cooler on the FA20 engine, ensuring better temperature management and increased engine longevity.

Why Install an Oil Cooler?

Oil coolers play a crucial role in maintaining optimal oil temperatures. Here are some benefits of installing an oil cooler:

  • Improved Engine Performance: Consistent oil temperatures lead to better lubrication and less wear on engine components.
  • Increased Reliability: Lower oil temperatures reduce the risk of oil breakdown, enhancing engine longevity.
  • Better Power Output: Maintaining optimal temperatures allows the engine to perform at its best, especially during high-stress situations.

Tools and Materials Needed

Before starting the installation, gather the following tools and materials:

  • Socket set
  • Wrench set
  • Torque wrench
  • Oil cooler kit (Mishimoto)
  • Oil filter wrench
  • New engine oil
  • Oil catch pan
  • Rags for cleanup

Step-by-Step Installation Process

Step 1: Prepare the Vehicle

Begin by ensuring that the vehicle is parked on a flat surface. Turn off the engine and allow it to cool down completely. Disconnect the negative battery terminal to prevent any electrical issues during the installation.

Step 2: Drain the Engine Oil

Place the oil catch pan under the oil pan. Using the socket set, remove the oil drain plug and allow the old oil to drain completely. Once drained, replace the drain plug and tighten it securely.

Step 3: Remove the Stock Oil Filter

Using the oil filter wrench, remove the stock oil filter. Be prepared for some residual oil to spill, so keep the catch pan in place. Clean the area around the oil filter mount to ensure a proper seal with the new filter.

Step 4: Install the Mishimoto Oil Cooler

Follow the instructions provided with the Mishimoto oil cooler kit. Generally, you will need to mount the oil cooler in a suitable location, ensuring it has adequate airflow. Secure the cooler using the provided brackets and bolts.

Step 5: Connect the Oil Lines

Attach the oil lines from the oil cooler to the engine. Make sure to follow the correct routing to avoid any kinks. Use the appropriate fittings and ensure all connections are tight to prevent leaks.

Step 6: Install the New Oil Filter

Apply a small amount of new oil to the rubber gasket of the new oil filter. Install the new filter onto the oil filter mount and tighten it according to the manufacturer’s specifications.

Step 7: Fill with New Engine Oil

Remove the oil fill cap on top of the engine. Using a funnel, pour the new engine oil into the engine. Refer to the owner’s manual for the correct oil capacity. Replace the oil fill cap once done.

Step 8: Reconnect the Battery and Start the Engine

Reconnect the negative battery terminal. Start the engine and let it idle for a few minutes. Check for any leaks around the oil cooler and oil filter. If everything looks good, you have successfully installed the Mishimoto oil cooler!

Conclusion

Installing a Mishimoto oil cooler on your FA20 engine is a straightforward process that can significantly enhance its reliability and performance. By following the steps outlined in this guide, you can ensure that your engine runs cooler and more efficiently, extending its lifespan and improving your driving experience.

Step 3: Remove the Stock Oil Filter

Using the oil filter wrench, remove the stock oil filter. Be prepared for some residual oil to spill, so keep the catch pan in place. Clean the area around the oil filter mount to ensure a proper seal with the new filter.

Step 4: Install the Mishimoto Oil Cooler

Follow the instructions provided with the Mishimoto oil cooler kit. Generally, you will need to mount the oil cooler in a suitable location, ensuring it has adequate airflow. Secure the cooler using the provided brackets and bolts.

Step 5: Connect the Oil Lines

Attach the oil lines from the oil cooler to the engine. Make sure to follow the correct routing to avoid any kinks. Use the appropriate fittings and ensure all connections are tight to prevent leaks.

Step 6: Install the New Oil Filter

Apply a small amount of new oil to the rubber gasket of the new oil filter. Install the new filter onto the oil filter mount and tighten it according to the manufacturer’s specifications.

Step 7: Fill with New Engine Oil

Remove the oil fill cap on top of the engine. Using a funnel, pour the new engine oil into the engine. Refer to the owner’s manual for the correct oil capacity. Replace the oil fill cap once done.

Step 8: Reconnect the Battery and Start the Engine

Reconnect the negative battery terminal. Start the engine and let it idle for a few minutes. Check for any leaks around the oil cooler and oil filter. If everything looks good, you have successfully installed the Mishimoto oil cooler!

Conclusion

Installing a Mishimoto oil cooler on your FA20 engine is a straightforward process that can significantly enhance its reliability and performance. By following the steps outlined in this guide, you can ensure that your engine runs cooler and more efficiently, extending its lifespan and improving your driving experience.