Do not change coolant before 1,00,000 km.
My boss introduced me a team, which has left Toyota 3S. They have set up in Islamabad. I have not visited them yet, but my boss praises them. Contact number is 0300-5534422, names of two persons (Mustafa, Amjad) Not sure who`s number is this.
I have planned to visit them at 80,000 mileage, for such service.