Park on a level surface and let the engine cool completely
Gather the correct coolant, a drain pan, funnel, gloves, and basic tools
Check the owner’s manual for the correct coolant type and mixture
Open the hood and locate the radiator cap or coolant reservoir cap
Place a drain pan under the radiator drain plug or lower hose
Open the drain plug or remove the lower hose to drain the old coolant
Drain the coolant from the overflow or expansion tank if needed
Close the drain plug or reconnect the lower hose
Fill the system with the correct coolant mixture
Fill the coolant reservoir to the proper mark
Start the engine with the heater set to hot
Let the engine run until it reaches operating temperature
Add coolant as the level drops while air is purging from the system
Check for leaks around hoses, drain plug, and cap
Shut off the engine and let it cool
Recheck the coolant level and top off if needed
Dispose of old coolant properly at a recycling or hazardous waste facility