Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2012A3 (8PA) L4-2.0L TURBO (CCTA)REPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINECOMPRESSION CHECKTESTING AND INSPECTION
2012 Audi A3 (8PA) L4-2.0L Turbo (CCTA)
Compression Check: Testing and Inspection
2012 Audi A3 (8PA) L4-2.0L Turbo (CCTA)SECTION Testing and Inspection
Compression Pressure, Checking
Special tools, testers and auxiliary items required
• Spark Plug Removal Tool (3122 B)
• Ignition Coil Puller (T40039)
• Compression Tester (V.A.G 1763)
• Adapter (V.A.G 1763/6)
Test Sequence
• Engine oil temperature min. 30 °C (86 °F)
• Battery voltage at least 12.7 V
- Remove the engine cover - arrows -.
- Disconnect the electrical connectors - arrows - on ignition coils.
- Remove the ignition coils with the (T40039).
- Remove the spark plugs using a (3122 B).
- Check compression using (V.A.G 1763) and (V.A.G 1763/6).
• Using the tester, refer to the operating instructions.
- Operate starter until tester shows no further pressure increase.
Compression Pressure
- Install spark plugs.
- Install the ignition coils with output stages.
• By separating the connections, Diagnostic Trouble Code (DTCs) are stored to memory. After the test, check the DTC memory and erase, if necessary.
- Check the Engine Control Module (ECM) DTC memory.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.