where from grinding could be from any where creaking is it when you get in and out of the car if so its the shocks just ware and tear not worth fixing untill they fail
If you are talking about the reservoir for the radiator, the radiator pulls coolant in from the tank when it is low.If you are adding coolant - water every week and there are no external leaks, the engine is burning the coolant out the exhaust pipe.Usually a leaking head gasket - intake gasket or cracked head.
Check for error codes first and correct them. The ECU might be making a rich mix because it is getting wrong info from sensors. Fix and clear any errors and see what happens.
If the warning light is staying on, there is a problem with the system and it is disabled.You need to have someone scan the body computer to look for trouble codes.
