You have a failed gasket, seal, or hose.
That means the engine is running HOT. Need to check the coolant level and check for coolant leaks.
If by water you mean engine coolant, yes. Loss of coolant, antifreeze, is a major cause of overheating.
It means low coolant. Top it up with water; and if it still leaks then maybe theres a hole in the container
Where? Be more specific? Try to put a bit more detail in your question top of the engine could mean anything.
You have a coolant leak.You have a coolant leak.
The water pump is worn out. Time for replacement.
Anything that can be burned to run a diesel engine.
The coolant level is low.The coolant level is low.
white smoke from diesel exhaust generally means you have engine coolant leaking internally in enginevery rarely , white smoke can indicate a problem with the turbo
The low coolant message on your 2004 Saturn Ion indicates that the engine coolant level is below the minimum required threshold. This could be due to a leak, evaporation, or insufficient coolant added during maintenance. It's essential to address this warning promptly, as low coolant levels can lead to engine overheating and potential damage. Check the coolant reservoir and refill it if necessary, and investigate any possible leaks.
If, by "thermostat" you mean the radiator flow valve that controls engine coolant temperature, yes. All liquid cooled engines need such a thermostat.
There's a leak somewhere in your coolant system. Check the radiator and the hoses.