Genuine Toyota Yaris Radiator Cap

Toyota Yaris Radiator Cap Parts Questions & Answers

• Cap Sub-Assy, Radiator
  16401-31480
  Q: How do you drain and flush a cooling system and check Radiator Cap?

  A: To begin with, to drain the cooling system, you can remove the expansion tank and radiator cap, letting the coolant drain. If the coolant is clean, it can be reused. Also, remove the thermostat and flush the engine until you see clean water. When refilling, secure all hoses and clips. You can use an antifreeze mixture and fill the system. If overheating occurs, squeeze the coolant hoses to release air. Check the radiator top hose for heat and release trapped air. Replace the pressure cap if damaged.