Its should be pretty common knowledge, but you should always keep the coolant level full. Engine coolant helps keep the temperature of the engine in normal range. Low coolant level cause the engine overheating, which is vital for the engine. Also true is that it keeps the engine from freezing.
How to check the engine coolant fluid level:
The coolant level should be between “LOW” and “FULL” marks in the coolant expansion tank as in the picture. If it’s lower, you should top it up. If there is no coolant in the expansion tank at all, you should add the coolant into the radiator also. But remember, NEVER open the radiator or the expansion tank cap when engine is hot! It can burn you and cause serious damage.
When engine temperature is close to normal, which is usually at least 10 minutes after the engine is off , simply add coolant into the expansion to “FULL” mark. and into the radiator if needed.
Remember, you should also flush the system every 60-90K miles. This ensure that no build up or contamination gets in there. This should be done more frequently if you are driving off road, in high temps, or high mileage. All of these parts and more Toyota parts can be found at BuyAutoParts.com. I don’t have a recommendation on any brand, but stick with the major names.
