[pln]

yes the repair manual tells you exactly what to do (the book). The internet manual should be simular. I had about the same experiance as you the when i fixed my bhg and it worked fine. Plus ... toyota mechanics will torque the headbolts with standard torque wich we all now is too little. Check the head for straightness, both under and above and diagonaly with a steel ruler. If the engine sometime have been too hot the head can twist, better start with another one if so.