Note: If the coolant is drained during repairs, the coolant drained into the container can be reused. If the coolant pump, radiator or cylinder head is replaced during repairs, the coolant must be replaced with new one.
Drain
Unscrew the expansion tank cap.
Caution: Remove the cap only when the radiator has cooled down and is warm to the touch, otherwise there is a risk of scalding from hot liquid. For safety reasons, cover the neck of the tank with a thick rag.
Place a clean container under the radiator to drain the coolant.
Open the heating system valve completely. To do this, set the temperature control knob to the red zone of the scale.
Remove the radiator drain plug and drain the coolant (V6 engine shown).
Place a clean container under the crankcase to collect the coolant.
OHC and V6 engines: unscrew the drain plug of the crankcase and drain the coolant (A: OHC engine; B: V6 engine).
Drain the coolant completely.
Flush the cooling system with clean water until the water flows out without any turbidity.
Tighten the radiator drain plug.
OHC and V6 engines: install the crankcase drain plug and tighten it to 25 Nm.
Filling
Pour coolant into the expansion tank until air bubbles stop escaping.
Fill the expansion tank with coolant up to the MAX mark.
Start the engine and let it run at high crankshaft speed for about 10 minutes. The engine should warm up to operating temperature. When warming up the engine, monitor the coolant level in the expansion tank and top up if necessary.
Close the expansion tank cap.
Turn off the engine. After the engine has cooled down, check the coolant level in the expansion tank and top up to the MAX mark if necessary.
Check the cooling system for leaks, especially at the hose connections, as well as at the drain plugs and coolant pump.