Old engine coolant can break down and become less effective at protecting your engine. You should check the coolant level in your car regularly and change the coolant once every two years. Toyota recommends a 50/50 blend of distilled water and antifreeze for proper engine cooling. You can replace the coolant in your Toyota Corolla easily at home, saving the hassle of a service centre appointment.
- Skill level:
- Moderately Easy
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Things you need
- Large drain pan
- Wrench set
- Distilled water
Make sure that your Corolla's engine is cool. The radiator is subject to high pressure when the engine is at operating temperature. If the engine hasn't run in several hours, raise the bonnet of the car and turn the radiator cap to remove it.
Set a drain pan under the radiator drain plug on the lower left side of the car, on the engine side of the radiator. The pan needs to be big enough to hold up to 3 gallons of coolant. Loosen and remove the drain plug with a wrench.
Wait while the coolant drains out of the radiator. When the coolant stops dripping, install and tighten the radiator drain plug. Add clean water to the radiator. Remove the radiator drain plug again to drain the water, flushing any debris or contaminants from the radiator.
Replace and tighten the radiator drain plug. Fill the radiator with the 50/50 coolant and water blend.
Start the engine, leaving the radiator cap off. Let the engine reach normal operating temperature and add coolant to the radiator as the level drops. Shut the engine off when the level seems consistent.
Wait for the engine to cool fully, then top off the coolant level if needed. Replace the radiator cap and close the bonnet.
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