The high-pressure cooling system has a reservoir filled with year-round antifreeze coolant. The reservoir is filled at the factory.
Check the antifreeze protection and coolant level at least once a year, at the beginning of the winter season and before traveling to a colder climate.
Hyundai Elantra AD (2016-2020) Service Manual: Special Service Tools
Special Service Tools
Tool (Number and name)IllustrationUse09880-4F000Hog ring clip installerHog ring clip installation
...
Hyundai Elantra AD (2016-2020) Owners Manual: Protecting your vehicle’s finish
Washing
To help protect your vehicle’s finish from rust and deterioration, wash it thoroughly
and frequently at least once a month with lukewarm or cold water.
If you use your vehicle for off-road driving, you should wash it after each off-road
trip. Pay special attention to the removal of a ...