2. Loosen or remove the bleed screws located on the thermostat housing cover and, where applicable, on the heater hose, near the bulkhead of the engine room (see pictures).
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3. Slowly pour fluid into the expansion tank while watching the bleed screw holes (see photo). As soon as liquid begins to flow out of them, which does not contain air bubbles, reinstall and tighten the screws.
4. Add liquid to the expansion tank so that its level rises to the filler neck. There will still be air in the system, which must be removed as follows.
5. Start the engine and let it run at fast idle for a few minutes. Turn off the engine.
6. Add fluid to the expansion tank up to the maximum level mark. Some models are marked on the side of the tank, and some have a special measuring plate or tube that is visible through the filler hole and which indicates both the minimum and maximum fluid levels (see photo).
7. Replace the reservoir cap.
8. Start the engine, let it warm up to normal operating temperature (a sign is the inclusion of a fan, which, after working for a while, turns off).
9. Turn off the engine and let it cool down for at least 1 hour.
10. Check the coolant level again (see paragraph 6) and top up if necessary.