engine coolant
1	it is essential to constantly keep your vehicle's coolant level full. low coolant level could cause engine overheating, which is vital for the engine.
2		how to check the engine coolant fluid level: the coolant level should remain between "low" and "full" marks in the coolant overflow tank as in the picture. if it is 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!
3		when engine temperature is reduced (few minutes after the engine has been turned off) , simply add coolant into the expansion up to "full" mark. and into the radiator if necessary.