Attention: If the liquid is drained during the repair process, then it must be collected in a container for reuse, as it contains antifreeze and anti-corrosion additives. If the coolant pump, radiator or cylinder head is replaced, the coolant must always be changed. Use coolant approved by TOYOTA.
Coolant drain
Unscrew the filler cap.
Attention: Cover it with a rag to protect against possible liquid spills. Remove the cover only when the temperature of the radiator has been reduced to at least human body temperature, otherwise there is a risk of scalding with hot liquid.
Place a container under the engine to collect fluid.
Drain the coolant through the radiator and cylinder block drain cocks. On fig. G-1815 shows the drain cocks of the diesel. On a gasoline engine, the cylinder block drain valve is located near the oil filter.
Drain the coolant completely.
Close drain valves.
Filling the system with coolant
Pour coolant through the radiator filler port until it protrudes from the port.
Pour coolant into the expansion tank up to the mark "MAXI". Close the tank with a lid.
Start the engine and let it run for 10 minutes. idle at high RPM. Keep an eye on the fluid level. Add liquid if necessary.
After the engine has cooled down, check the coolant level in the expansion tank. If necessary, add fluid up to the mark "MAXI".
Check the cooling system for leaks, in particular the hose connections, drain plugs and pump.