Hi! To make a long story short: I have a Nissan 200SX S13 drift/track car, with an 1UZ-FE VVTi swap. Custom harness from PEM in England(stock ECU), double 12" electric fans and a 58mm aluminium radiator. Filled the radiator with red coolant, and let the car idle for about 10 minutes, and the temperatures kept rising. Oil temp stayed at around 80*c, but the water temp kept rising, to about 110*c before we turned it off. Have tried replacing the thermostat, and the water pump doesn’t make any bad noises. Have also tried to take off the return hose from the radiator and have filled coolant straight into the engine so it’s full, but it still doesn’t circulate. Any tips or help would be much appreciated!