Astra L4-1.8L (2009)
Thermostat: Service and Repair
Engine Coolant Thermostat Replacement
Removal Procedure
Warning: Refer to Battery Disconnect Warning (See: Starting and Charging/Battery/Service Precautions).
1. Open the hood.
2. Disconnect the battery.
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Remove the negative connection from the ground terminal.
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Loosen the nut.
3. Raise the vehicle by its full height.
4. Place a drain pan underneath.
5. Drain the coolant.
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Place a drain pan underneath.
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Install the suitable hose to the drain connection (2).
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Open the coolant drain screw (1).
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Drain the coolant.
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Close the coolant drain screw.
