My toyota surf 2.4d 1992 model

[Kaydee]

I bought a surf 2.4 diesel of 1992 model, the engine was not turnig after she lost its engine oil. It was love at first site, the body and her interior looks gorgeous. I got the engine sorted but she was no longer exceeding 90km/h on road, she lost power and consuming more diesel. I replaced a new diesel pump, serviced the injectors and she regained her power and the fuel consumption became 1litre/ 11km. She started overheating in few weeks time, I got the radiator serviced but nothing changed, I took out the thermostart but she is still overheating what might be the causes of this? I don't want to lose her so soon I bought her in january 2012.