early in the morning, start the engine lift the bonnet &
remove radiator cap
let engine run & warm up
wait and see any coolant flow happening in the radiator wait for cooling fan to engage on automatic
if coolant is moving in any direction and fan is also cutting off , everything is fine culprit may be radiator cap.
IF coolant is not flowing in any direction but boiling out and fan also turns on / off
the Thermostat valve is sticky, open the system and replace oem thermostat , drain WATER and top up with coolant
post the observations at convenience, if you are in Lahore visit Obama car care 0321 4106898 in tipu block garden town
in Karachi visit Jamil Autos Khudadad Colony 0300 223 7538