Car: Honda Civic FD4
Problem: Engine overheating at long distance journeys and loss of coolant (about 500ml per 30 minutes drive).
Observations:
Foam creating in the radiator cap (currently running with only water due to coolant loss).
Overflow tank getting full all the time after a drive. There are some foam in the overflow tank too.
Occasional white smoke during the morning, cold starts.
A leak in the radiator core.
The mechanic said it takes a longer than usual time for the thermostat valve to be opened.
Both fans work without A/C but takes time to turn on.
No other visible external locations for coolant leakage.
Things Done:
Replaced the radiator.
Question:
What could be the reason? If it's a blown head gasket (or something else), what is the correct procedure to diagnose/fix it?
