How to Change Antifreeze on a Toyota Highlanderby Jeffrey Caldwell
The antifreeze inside your Toyota Highlander keeps the water in your engine’s cooling system from freezing in cold temperatures. Water freezing inside the cooling system could severely damage the radiator and heater core, as well as the cooling hoses. Antifreeze also plays a vital role in inhibiting rust inside your Toyota Highlander’s cooling system. Over time, the ability of antifreeze to fight rust degrades. It is important that you change your antifreeze regularly.
Draining the Antifreeze
Press down on the radiator cap and turn it counterclockwise, then pull it off the radiator.
Locate the petcock valve on the lower right corner of the radiator. Place a waste oil collection pan underneath it.
Open the petcock valve by turning it counterclockwise with a needle nose pliers.
Allow the radiator to drain completely, then close it using a needle nose pliers.
Refilling the Cooling System
Fill an empty gallon-sized plastic container half full with fresh antifreeze.
Fill the rest of the container with water.
Pour the 50/50 mix of antifreeze and water into the radiator cap neck until the level of coolant in the radiator reaches 1 inch below the radiator cap neck.
Run the engine with the radiator cap off. This will bleed air from the cooling system.
Add enough of the 50/50 mix of antifreeze and water until the level of coolant in the radiator comes to within 1 inch of the radiator cap filler neck.
Place the radiator cap onto the neck. Press down and turn it clockwise.
- "Chilton Asian Service Manual 2008 Edition Vol. II"; Chilton; 2009
- "Haynes Toyota Highlander and Lexus RX-330 1999-2006 Repair Manual"; Ken Freund; 2007
- Most auto parts stores that accept waste motor oil will accept waste antifreeze as well.
Things You'll Need
- Needle nose pliers
- Waste oil collection pan
- Empty gallon-sized plastic container
- The scent of antifreeze is highly attractive to household pets. It is also highly toxic. Keep small children and pets away from antifreeze.
Jeffrey Caldwell has been a freelance writer for over five months and has published over 250 articles on websites like eHow and Trails.com. Caldwell writes articles on a wide range of topics including travel, camping and automotive mechanics. He has a Bachelor of Arts in English from Millersville University.