Hyundai Elantra MD/UD: Cooling system - Explanation of scheduled maintenance items - Maintenance - Hyundai Elantra MD 2010-2015 Owners manualHyundai Elantra MD/UD: Cooling system

Check cooling system components, such as radiator, coolant reservoir, hoses and connections for leakage and damage. Replace any damaged parts.

Spark plugs
Make sure to install new spark plugs of the correct heat range. ...

Coolant
The coolant should be changed at the intervals specified in the maintenance schedule. ...