I own a MK 1 Citi Golf Sport 1.6 Carb that has 523220 km. I recently flushed the cooling system and changed the coolant. After the flush the temperature showed above normal despite changing everything. I also replaced the thyristor and still the temperature gauge reads above normal 50%. The fan kicks in as normal and the car is not overheating.
I have had a dry and wet pressure test done, compression good. There is no mixing of water and oil. I have changed the water pump, checked fuses, checked the instrument cluster and electrics, and all circuitry is good.
I have done this so many times before and never had problems until now. What could cause this?