So this is what I did, I did not go to mechanic I was not sure. So on second day of Eid , 02 August. I drove from Lahore to Gujranwala via Sialkot Motorway. The car was driven around 135-140 km/h and AC+ Fan on Full Speed, outside temperature was around 35. After 45 minutes I noticed the heat needle was moving up, once it crossed the halfway mark, I parked the car and opened bonnet, there was no leakage in pipes, I could not find any noise, drops around T. When I saw the overflow bottle of Radiator I noticed the water was coming out from overflow pipe(thats all I can found) then I drove around 100-110 and it was fine. Finally on my way back(in night) I checked the water. The radiator level was alright but the water level in Bottle was low.
So what could be the problem