Have a 1997 2.0 petrol galaxy. Got this from a freind as they were replacing due to this one having faults It had its radiator replaced as was told old one was faulty. Been trying to fix this for a while now but dont know what else to do. Main thing is dont think the water is goin round the system correctly as last weekend we drained the coolant (taking bottom hose off rad tp empty) and then went to refil dint take much more then 3 litres until the expansion tank was full, so turned engine on and done fast idle for couple minutes but all the is happening is water is pumping out of the expansion tank every couple of seconds even when normal idle, and there feels like no water is getting through what so ever to bottom hose on rad as its so easy to squeeze and its staying cool. same with the top hose. so left it there, and its been ran a few times to work (bout 5 mins away). so i checked the levels and expansion tank was empty so i filled up again (took bout 1 half litre) and started and fast idled again and same thing happened water pumpin out, so i put lid on exp tank and let it idle for a while and still no hot top or bottom hose so i turned it off and was just looking at engine and the pipes for coolant all starting lumpin araoun nd making sounds. so i started engine again and let it idle and top hose was hot but bottom hose was cool this was after bout 6-7 mins on idle. dont know what else to go out checked the thermostat in hot water thats working fine, but the temp sensor in car is on and off, most time not working but then and now will come on for couple mins, just to say we put hose in top of rad and flsuhes it and water came out clear. Would really appreciate help as car can only go around town atm and long roads and it starts overheatin. Thanks for any help