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On a 3.6L commodore:

With coolant temperature UNDER 40 degrees centigrade:

1. Jack up the vehicle and place on stands, so that the car is LEVEL.

2. Open bonnet (or the "hood" for Americans) and remove cooling system fill cap.

3. Right hand side of radiator - remove small hose that runs to overflow bottle.

4. Place 20L bucket under front-drivers side of car. Locate drain valve.

5. Use 16mm socket (by HAND - NO driver) and undo nut - it will fall down and coolant will drain

6. Once all 10L of coolant is out - replace cock and HAND tighten. DO NOT OVERTIGHTEN!

7. Add Nulon RED coolant mixed to 50:50 until system is full.

8. Do not cap filling cap. Start engine (press the left silver rotating knob on left of steering wheel when you switch the ignition on. That will bring up service mode.

9. Allow the car to heat the coolant until at least 91c is achieved. Keep filling coolant until the system is full.

10. All of the bubbles should have stopped by now - the filler is the highest point in the system.

11. Job done. Take it for a spin - check every few days for correct levels.

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Wiki User

11y ago
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Bruce Eales

Lvl 1
10mo ago
Was looking for way to get all the coolant out. Drain cock is easy as but only gets 5 l or so out.

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Q: How do you change coolant on ve commodore?
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