How to Flush the Cooling System in Your Subaru: A Complete Guide

Are you a Subaru owner who is experiencing engine overheating or poor performance? If so, it might be time to flush your cooling system. Flushing your engine’s cooling system is an essential maintenance task that helps prevent engine overheating and prolongs your car’s lifespan.

In this guide, we’ll cover everything you need to know about how to flush the cooling system in your Subaru. From the importance of flushing to the necessary equipment, to step-by-step instructions, we’ve got you covered.

Key Takeaways

  • Flushing the cooling system in your Subaru is essential to prevent engine overheating and prolong your car’s lifespan.
  • You should flush your cooling system every 30,000 miles or every three years.
  • Ensure that your Subaru’s engine is cool before you start flushing the cooling system.
  • You’ll need the following equipment to flush your cooling system: coolant, container, funnel, and a hose.
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Why is Flushing Your Subaru’s Cooling System Important?

Your Subaru’s engine produces a lot of heat, especially during high-performance driving. The engine’s cooling system plays a vital role in regulating the engine’s temperature, ensuring that it doesn’t overheat. Over time, the coolant in your engine’s cooling system can become contaminated, resulting in poor engine performance and overheating.

Flushing your Subaru’s cooling system is an essential maintenance task that helps prevent engine overheating and prolongs your car’s lifespan. Flushing your engine’s cooling system removes old, contaminated coolant, dirt, and other debris that may have accumulated in the system. It also helps prevent corrosion, which can damage your engine’s cooling system and lead to expensive repairs.

When Should You Flush Your Subaru’s Cooling System?

The recommended interval for flushing your Subaru’s cooling system is every 30,000 miles or every three years, whichever comes first. However, if you’re experiencing engine overheating, poor engine performance, or you notice that your coolant is discolored or contaminated, you should flush your cooling system right away.

Equipment You’ll Need

Before you start flushing your Subaru’s cooling system, you’ll need the following equipment:

  • Coolant
  • Container
  • Funnel
  • Hose

How to Flush Your Subaru’s Cooling System

Now that you have all the necessary equipment let’s dive into the step-by-step process of flushing your Subaru’s cooling system.

Step 1: Ensure Your Engine is Cool

Before you begin flushing your Subaru’s cooling system, make sure that the engine is cool. It’s essential to avoid burns or other injuries that could result from working on a hot engine. Waiting at least an hour after driving your car is ideal.

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Step 2: Locate the Radiator Drain Plug

Locate the radiator drain plug underneath the car. You may need to remove the engine cover to access it. Once you’ve found it, place your container underneath the drain plug to catch the old coolant.

Step 3: Drain the Old Coolant

Unscrew the radiator drain plug and let the old coolant drain into the container. Once the coolant has drained, close the radiator drain plug.

Step 4: Refill the Cooling System

Fill the cooling system with water and add a radiator flush solution according to the manufacturer’s instructions. Run the engine for about 10 to 15 minutes, allowing the solution to circulate through the system.

Step 5: Drain the Radiator Again

Once you’ve run the engine for 10 to 15 minutes, turn off the engine and let it cool down. Drain the radiator again, catching the contaminated water in the container.

Step 6: Refill with Coolant

After draining the radiator, refill the cooling system with the recommended coolant according to the manufacturer’s instructions. Use a funnel to prevent spilling.

Step 7: Check the Radiator

Start the engine and let it run for a few minutes while checking the radiator for leaks. If you notice any leaks, turn off the engine and fix them.

Step 8: Dispose of the Old Coolant Safely

Dispose of the old coolant safely by taking it to a recycling center or a local authorized collection facility.

Congratulations! You have successfully flushed your Subaru’s cooling system.

Tips for Flushing Your Subaru’s Cooling System

  • Wear protective clothing and gloves to avoid burns or other injuries.
  • Use distilled water instead of tap water to prevent mineral build-up in your cooling system.
  • Always check your Subaru’s owner’s manual for specific instructions and recommendations before flushing your cooling system.
  • Make sure that the coolant you use is compatible with your Subaru’s make and model.
  • Always dispose of the old coolant safely.
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Frequently Asked Questions

Q: How long does it take to flush the cooling system in a Subaru?

A: Flushing your Subaru’s cooling system can take anywhere from 30 minutes to an hour, depending on your experience and the condition of your cooling system.

Q: Can I flush my Subaru’s cooling system myself, or do I need to take it to a mechanic?

A: You can flush your Subaru’s cooling system yourself as long as you follow the right steps and have the necessary equipment. However, if you’re not confident in your abilities, it’s best to take your car to a mechanic.

Q: Can I use any type of coolant in my Subaru’s cooling system?

A: No, you should only use a coolant that is compatible with your Subaru’s make and model. Check your owner’s manual for specific recommendations.

Q: How often should I check my Subaru’s coolant level?

A: You should check your Subaru’s coolant level every few weeks to ensure that it’s at the correct level. If you notice that it’s low, fill it to the recommended level.

Conclusion

Flushing your Subaru’s cooling system is an essential maintenance task that helps prevent engine overheating and prolongs your car’s lifespan. By following the steps outlined in this guide, you can confidently flush your Subaru’s cooling system and avoid costly repairs. Remember to check your owner’s manual for specific instructions and recommendations and dispose of the old coolant safely.

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Joseph Weaver

With a background in engineering and a passion for cars, Joseph brings a unique perspective to our blog. He's particularly interested in the technology and innovation behind Subaru's advanced safety features, and his articles on this topic are always insightful and informative. When he's not writing, he enjoys playing video games and spending time with his family.

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