For the sake of your internal car parts, keep an eye on the coolant. Whether you own a Toyota, Chevy, or Audi – you will have to do regular maintenance. You would be surprise how uncommon the ability to change the coolant is. Here goes:
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.
Changing engine Coolant:
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.
Adding engine coolant:
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.

October 22nd, 2009 at 6:24 pm
Good advice. At 75K you should also change the O2 sensors. Will save the engine and increase performance.
January 2nd, 2010 at 3:14 pm
My rover 25 was forever popping head gaskets all because we never filled up the engine coolant now i drive a modified vw golf and i would never go back !