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How to change engine thermostat on VAUXHALL ASTRA Hatchback – replacement guide
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Recommended replacement interval for the part category Thermostat : 50000 km
Important!
This replacement procedure can be used for:
VAUXHALL ASTRA Hatchback 1.3 S, VAUXHALL ASTRA Hatchback 1.2 S … View more
The steps may slightly vary depending on the car design.
VAUXHALL ASTRA Hatchback 1.3 S, VAUXHALL ASTRA Hatchback 1.2 S … View more
The steps may slightly vary depending on the car design.
This video shows the replacement procedure of a similar car part on another vehicle
All the parts you need to replace – Thermostat for ASTRA Hatchback and other VAUXHALL models
Alternative products

Wire brush
All-purpose cleaning spray
Torque wrench
Torx bit E10
Ratchet wrench
Clip removal tool
Clic-R collar pliers
Seal scraper
Funnel
Fluid container
Fender cover
Replacement: engine thermostat – VAUXHALL ASTRA CC. AUTODOC recommends:
- Check the condition of the coolant every time you replace the thermostat. Change the coolant if necessary.
- Please note: all work on the car – VAUXHALL ASTRA CC – should be done with the engine switched off.
- All work should be done with the engine stopped.
Carry out replacement in the following order:
- Step 1Open the bonnet.Step 2Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.Step 3
Unscrew the coolant reservoir cap. - Step 4Raise the car.Replacement: engine thermostat – VAUXHALL ASTRA CC. Professionals recommend:If you are using a jack, make sure it rests on a flat surface without any unevenness.Be sure to additionally secure the car with jack stands.Step 5
Clean the lower coolant pipe mounting seat. Use all-purpose cleaning spray. - Step 6
Prepare a container for fluids. - Step 7
Loosen the coolant hose clamp. Use clic-R collar pliers. - Step 8
Detach the coolant hose.Replacement: engine thermostat – VAUXHALL ASTRA CC. AUTODOC experts recommend:Caution! Coolant may leak out of the coolant lines and thermostat housing. - Step 9
Drain the coolant from the engine.Replacement: engine thermostat – VAUXHALL ASTRA CC. Tip:Wear gloves to prevent contact with hot liquid. - Step 10
Attach the coolant hose. - Step 11
Secure the coolant hose clamp. Use clic-R collar pliers. - Step 12Lower the car.Step 13
Remove the clip on the air filter intake hose. Use a clip removal tool. - Step 14
Disconnect the air intake pipe from the air filter housing. - Step 15
Clean the coolant hose connections. Use all-purpose cleaning spray. - Step 16
Loosen the clamps of the coolant hoses. Use clic-R collar pliers. - Step 17
Detach the coolant hose.Replacement: engine thermostat – VAUXHALL ASTRA CC. AUTODOC recommends:Caution! Coolant may leak out of the coolant lines and thermostat housing. - Step 18
Cover the radiator hose to prevent dirt or foreign objects from entering the system. - Step 19
Clean the thermostat housing. Use a wire brush. Use all-purpose cleaning spray. - Step 20
Unscrew the thermostat housing fasteners. Use Torx E10. Use a ratchet wrench. - Step 21
Remove the thermostat housing together with the thermostat. - Step 22
Cover the mounting seat of the thermostat housing with a microfibre cloth to prevent dirt and foreign objects from entering the system. - Step 23
Remove the rubber strip. - Step 24
Clean the mounting seats of the thermostat housing. Use all-purpose cleaning spray. Use a seal scraper. - Step 25
Install the new thermostat housing together with the thermostat.
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