My cultus 2006 was reducing water in radiator. The fan was direct and there was no thermostat valve installed. However, reading many useful suggestions here I opted for changing radiator (placed new allwin dual channel) and put new hose pipes and thermostat valve. Now when I cold start engine and open the radiator cap I see water being thrown out of the radiator constantly. I keep pouring and it keeps taking water. This stops as soon as the car heats up and thermostat and fan start, I dont see bubbling up of water but just a smooth overflow from the top. I am unsure about whats going on. Is it normal or there is some issue about water being thrown out till the car heats up to the desired thermostat operation level.