Coolant Loss With No Visible Leak
What you may notice: The coolant level keeps dropping, sometimes with a sweet smell, a temperature warning or white exhaust.
Possible causes
- Small external leak that only shows when hot
- Water pump, hose or radiator seepage
- Pressure cap or reservoir fault
- Internal leak such as a head gasket concern
Pressure testing and combustion-gas testing separate an external leak from an internal one before any engine work is discussed. How we confirm a head gasket problem.





