So our nissan wingroad has been overheating quite often recently, as long as we keep moving it seems to be fine..
I investigated and found that water was not flowing through the radiator (hot pipe on top cold pipe on bottom and no hot air comes out on full hot inside) so straight away figured the thermostat so changed that.. That made no difference so I figured water pump so me and a mate changed that, while it was drained of coolant we blew water through the radiator and engine block to ensure nothing was blocked. Sure enough it was still doing it, so I removed the thermostat and it appeared to work fine (of course assumed dud new thermostat). We drove it into town last night and sure enough it started overheating (still no thermostat fitted), when my wife went to pick it up today it went fine (normal temp hot air comes out) but then she took a trip to the supermarket a bit later on again again it overheated no hot air etc.. So it is doing my head in, if you keep moving then it doesn't get over 3/4 on the temp gauge but it can't be good for it to going up and down in temp. The temperature also seems to swing very fast like it will drop from 3/4 to under a half in a matter of seconds which seems a bit fast to me?
So this is really doing my head in there isn't much to the system and it shouldn't be that hard to figure it out?