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How to change engine thermostat on VAUXHALL Astra Mk III (F) Estate (T92) – 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 Mk III (F) Estate (T92) 1.6 Si, VAUXHALL Astra Mk III (F) Estate (T92) 1.4 i, VAUXHALL Astra Mk III (F) Estate (T92) 1.6 i, VAUXHALL Astra Mk III (F) Estate (T92) 1.6 i, VAUXHALL Astra Mk III (F) Estate (T92) 1.4 i … View more
The steps may slightly vary depending on the car design.
VAUXHALL Astra Mk III (F) Estate (T92) 1.6 Si, VAUXHALL Astra Mk III (F) Estate (T92) 1.4 i, VAUXHALL Astra Mk III (F) Estate (T92) 1.6 i, VAUXHALL Astra Mk III (F) Estate (T92) 1.6 i, VAUXHALL Astra Mk III (F) Estate (T92) 1.4 i … 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 Mk III (F) Estate (T92) 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 Mk III (F) Estate. 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 Mk III (F) Estate – 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 Mk III (F) Estate. 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 Mk III (F) Estate. 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 Mk III (F) Estate. 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 Mk III (F) Estate. 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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