The pressurized coolant surge tank ensures that the radiator hoses and the radiator coolant passages are kept full at all normal operating temperatures. Coolant is added to the system only at the surge tank, and only when the system is cool.
The clear plastic surge tank is connected to the cooling system at the following three points:
| • | The tee connection on the coolant intake pipe |
| • | The throttle body heater outlet |
| • | The radiator air bleed |
The pressurized coolant circulates through the surge tank from the throttle body heater outlet to the coolant intake pipe inlet tee connection. The radiator air bleed connection allows air to purge from the radiator. The surge tank is at the highest point of the cooling system. This allows any air or vapor that exceeds the cap rating to exit the system. When the coolant is cold, the level should be at the KALT/COLD mark (the seam in the reservoir). An integral low coolant level switch is bonded on the bottom of the surge tank and cannot be removed.
