@xulfiqar bhai please see post # 19.
and one more query, i have bought and installed the thermostat valve of 4A engine in 2C (as u guided me that they r same). now i want to pour in coolant, i went to Toyota Eastern and they showed me two kinds of coolant, one was 4L premixed for Rs. 2,500 and another was 1L for Rs.2,100 which was to be mixed later on. now which one is for me and how much liters should i buy ?? i have also collected 8,9L AC water for mixing purpose.