1993 Toyota Celica engine reheating

Thank you for your time, the car has the electro fan working all the time since the valve is damaged, within the city it works very well, but when you start any slope or climb Tinde to increase the temperature, the radiator is cleaned, the elctro fan was verified and the water pump all good, I thank you can help me with your comments.

Hi Julius I had a similar problem a while ago with an Ldo and disarmed steed the radiator Clean it, change the lid joint, take the lid to two rectifiers to see if it was with any fissure bought a used since the car is old and there is no new replacement, take another rectifier and finally this person discovered a fissure that did not detect the hydraulic test.

Verify the thermostat, and the pump checks if the palettes are good and do not give you enough flow to cool the engine