Non-Trouble Code Procedures
COOLING SYSTEM AERATIONIf coolant level drops below a certain point, aeration will occur drawing air into the water pump resulting in the following:
^ High reading shown on the temperature gauge.
^ Loss of coolant flow through the heater core.
^ Corrosion in the cooling system.
^ Transmission oil will become hotter (automatic transmission equipped vehicles).
^ Water pump seal may run dry, increasing the risk of premature seal failure.
^ Combustion gas leaks into the coolant can also cause the above problems.
COOLING SYSTEM DEAERATION
As air is removed from the cooling system, it gathers in the coolant recovery container. This pressure is released into the atmosphere through the pressure valve located in the radiator pressure cap when pressure reaches 96 - 124 kPa (14 - 18 psi). This air is replaced with coolant from the coolant recovery container.
NOTE: Deaeration does not occur at engine idle, higher engine speeds are required. Normal driving will deaerate cooling system.
To effectively deaerate the system, multiple thermal cycles of the system may be required.