Diagnosis And Testing: Aeration
NOTE:
Combustion gases leaking into the coolant may cause some or all of the concerns listed, as well as other vehicle concerns.
If 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.
- Water pump seal may run dry, increasing the risk of premature seal failure.