How to Replace Spark Plugs on Opel Astra G (T98, F08, F48)
A step-by-step guide from AUTODOC for replacing spark plugs on compatible Opel models.
Video Tutorial Available
A video tutorial is available for this replacement procedure. ▶️ VIDEO TUTORIAL
? Important!
This replacement procedure is applicable to the following vehicles:
- OPEL AGILA (A) (H00) 1.2 16V (F68)
- OPEL ASTRA G Estate (T98) 1.2 16V (F35)
- OPEL ASTRA G Hatchback (T98) 1.2 16V (F08, F48)
- OPEL ASTRA G Saloon (T98) 1.2 16V (F69)
- OPEL CORSA C (X01) 1.2 (F08, F68)
- OPEL CORSA C Box (X01) 1.2 16V (F08, W5L)
Please note that the exact steps may vary slightly depending on the specific car design.
Required Tools
- High-temperature anti-seize lubricant
- Electronic spray
- Torx bit T30
- Spark plug socket #16
- Ratchet wrench
- Torque wrench
- Flat screwdriver
- Crow bar
- Fender cover
Image description: A flat lay image displays various tools required for the task, including a high-temperature anti-seize lubricant, electronic spray, a Torx T30 bit, a spark plug socket (size #16), a ratchet wrench, a torque wrench, a flat screwdriver, a crowbar, and a fender cover.
AUTODOC recommends:
- The replacement procedure is the same for all spark plugs.
- All work should be done with the engine stopped.
Replacement Procedure
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Step 1: Open the Hood
Open the hood of the vehicle. Use a fender protection cover to prevent damaging the paintwork and plastic parts of the car.
Image description: An image shows the front of a blue Opel car with its hood open, revealing the engine bay. The instruction is to open the hood and use a fender protection cover.
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Step 2: Remove the Engine Cover
Remove the engine cover.
Image description: A close-up view of an engine bay where hands wearing gloves are shown removing a black engine cover.
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Step 3: Detach Ignition Coil Connector
Detach the connector from the ignition coil. Use a flat screwdriver.
Image description: A close-up view of an engine component (ignition coil) where a hand is shown detaching a connector using a flat screwdriver.
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Step 4: Unscrew Ignition Coil Bracket
Unscrew the ignition coil bracket. Use Torx T30. Use a ratchet wrench.
Image description: A close-up view of an engine component where a hand is using a ratchet wrench with a Torx T30 bit to unscrew a bracket.
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Step 5: Pry Up Ignition Coil
Pry up the ignition coil. Use a crowbar.
Image description: A close-up view of an ignition coil being pried upwards from its seating using a crowbar.
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Step 6: Remove Ignition Coil
Take out the ignition coil from the spark plug well.
Image description: A close-up view of an engine bay where a hand is shown carefully lifting an ignition coil out of a spark plug well.
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Step 7: Clean Spark Plug Wells
Clean dirt, dust, and debris from inside the spark plug wells.
Image description: A view inside an engine bay showing spark plug wells, with hands cleaning out dirt and debris.
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Step 8: Unscrew Spark Plugs
Unscrew the spark plugs. Use the spark plug socket #16. Use a ratchet wrench.
Image description: A close-up view of an engine component where a hand is using a ratchet wrench with a spark plug socket (#16) to unscrew a spark plug.
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Step 9: Remove Spark Plugs
Take out the spark plugs.
Image description: A close-up view of a removed spark plug, held by a hand.
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Step 10: Apply Anti-Seize Lubricant
Apply a thin layer of a special high-temperature anti-seize lubricant to the threads of the new spark plugs.
Image description: A close-up view of two new spark plugs, with a hand applying a thin layer of anti-seize lubricant to the threads of one.
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Step 11: Install New Spark Plugs
Install the new spark plugs into their mounting seats.
Image description: A view inside an engine bay where hands are shown installing new spark plugs into their respective mounting seats.
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Step 12: Tighten New Spark Plugs
Screw new spark plugs and tighten them. Use the spark plug socket #16. Use a torque wrench. Tighten to 24 Nm torque.
Image description: A close-up view of an engine bay where a hand is using a torque wrench with a spark plug socket (#16) to tighten a new spark plug.
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Step 13: Install Ignition Coil
Install the ignition coil into the spark plug well. Make sure you hear a click indicating that it is locked in place.
Image description: A close-up view of an engine bay where a hand is shown inserting an ignition coil back into its spark plug well, with an audible click indicated.
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Step 14: Tighten Ignition Coil Fastening
Tighten the ignition coil fastening. Use Torx T30. Use a torque wrench. Tighten to 15 Nm torque.
Image description: A close-up view of an engine component where a hand is using a torque wrench with a Torx T30 bit to tighten the ignition coil fastening.
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Step 15: Treat Ignition Coil Connector
Treat the ignition coil connector with electronic spray. The spray will protect the electrical contacts from corrosion, oxidation, and will reduce the contact resistance.
AUTODOC recommends: After applying the spray, wait a few minutes.
Image description: A close-up view of an ignition coil connector where a hand is spraying electronic contact cleaner onto the terminals.
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Step 16: Plug In Ignition Coil Connector
Plug in the ignition coil connector.
Image description: A close-up view of an ignition coil connector being plugged back into its ignition coil.
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Step 17: Install Engine Cover
Install the engine cover and secure it. Make sure you hear a click indicating that it is locked in place.
Image description: A view inside an engine bay where hands are shown placing a black engine cover back onto the engine, ensuring it clicks into place.
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Step 18: Run Engine and Shut Off
Run the engine for a few minutes. This is necessary to ensure that the component operates properly. Shut off the engine.
Image description: An image of a car's dashboard showing various warning lights illuminated and the odometer reading. The instruction is to run the engine and then shut it off.
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Step 19: Remove Fender Protection Cover
Remove the fender protection cover.
Image description: An image of the car's engine bay with the hood open, showing a fender protection cover being removed.
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Step 20: Close the Hood
Close the hood.
Image description: An image of the car's hood being closed.
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Disclaimer
This document contains general recommendations for repair or replacement work. AUTODOC shall not be liable for any loss, injury, or damage of property occurring due to incorrect use or misinterpretation of the provided information.
AUTODOC shall not be liable for any mistakes or uncertainties in this guide. The information is for informational purposes only and cannot replace professional advice.
AUTODOC shall not be liable for incorrect or hazardous usage of equipment, tools, and car parts. AUTODOC strongly recommends caution and adherence to safety rules. Usage of low-quality auto parts does not guarantee appropriate road safety.
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