I need help! I'm having overheating issues, the engine is not overheating, I can see that with a temperature gun, but, the gauge clearly thinks the engine is overheating. I've had this issue on and off for over a year. I've had the cooling system completely flushed and checked over, I've had two (separate) well known Land Rover mechanics look over the cooling system but I still can't find the problem. I've been told it may be an earth fault but also told that if it was an earth fault then the gauge would rise instantly, my gauge rises slowly and steadily. There are three temperature sensors in the attached photos, the one on the far right (of three) was in the vehicle when I bought it, worked grand for over a year then started to give the overheating issue. The middle sensor I bought by mistake, I think it is for the petrol engine? The sensor on the left should be correct, fits the engine but shows it as overheating. Two questions, anyone have any idea what the problem might be and anyone know the part number for the temperature sensor on the right (of the three) as I can't find it anywhere! I'd like to get a new one of that type as it appeared to work. The engine is a 19J 2.5 turbo-diesel in a 1988 Land Rover 90. Thanks for your time!
