Originally Posted by Sunny
i changed the coolant and also the Thermostat, it still overheat at high speed like driving around 80 or 90 for like 10 to 15 min , i have to turn on the heater to get it to cool down , what seems to be the problem thanks
Sunny
Then maybe your radiator is fouled. You might have some luck with SuperFlush or something like that? If not, then maybe a new radiator.