How do you put Engine coolant 2002 Toyota Highlander?

Answer 1

After draining the cooling system completely - replace the contents with a 50/50 mixture of coolant and water. Add the mixture through the radiator filler until full and replace the cap. Start the vehicle and idle it for 5-10 minutes. Carefully remove the cap and top off the radiator. Then add coolant mixture to the radiator overlfow bottle and continue to idle the engine for 10 minutes. If needed, top off the radiator overflow bottle up to the 'HOT' mark and you're done.