Can we recap on what is happening, or not happening? The temp gauge goes to half way, and no higher? Have you let the car run for long enough for thermostat to open (to get flow through the radiator). If it gets too hot (temp gauge) and the rad bottom hose is still cold, did you put the thermostat in the right way up (with the airlock toggle at the top), and right way round (if it’s the wrong way round, it won’t open)? If it’s not overheating, and ambient temperature is not letting it get too hot, the fans won’t come on, so maybe there is nothing wrong. Do you get heat in the cabin? Sent from my iPhone using Tapatalk Pro