Compression pressures, checking

Fig 1: Identifying Special Tools - Compression Pressures, Checking

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Special tools, testers and auxiliary items required 

• Hose clamps up to 25 mm dia. 3094
• Spark plug removal tool 3122 B
• Compression tester V.A.G 1763
• Puller T40039

Work procedure 

• Engine oil temperature min. 30 ° C.
• Battery voltage min. 12.5 V.

• Switch off ignition.

Fig 2: Removing On Engine Speed (RPM) Sensor G28 At Left Of Transmission

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• Disconnect electrical connector at Engine Speed (RPM) Sensor G28 - arrow  - at left of transmission by bending heat shield to side slightly.

Fig 3: Removing Cover In Engine Compartment (Left Side)

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• Remove cover - 1  - in engine compartment (left side).

Fig 4: Removing Coolant Hoses & Coolant Expansion Tank

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• Clamp off coolant hose - 2  - using hose clamp 3094 and disconnect from coolant expansion tank.
• Seal connection using a plug that fits.
• Remove coolant expansion tank - arrow  -.
• Disconnect electrical wire from engine coolant level (ECL) warning switch F66 at bottom on coolant reservoir and set aside coolant reservoir with coolant hose - 1  - connected.

Fig 5: Identifying Oil Dipstick, Bolts & Ignition Coils Electrical Harness Connectors

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• Remove oil dipstick - 1  - from guide tube.
• Remove bolts - 2  - and - 3  -.
• Disconnect electrical harness connectors at ignition coils.
• Press electrical wiring harness to side.

Fig 6: Removing Bolts & Air Ducts

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• Remove bolts - arrows  -.
• Remove air duct - 1  - and - 2  -.

Fig 7: Identifying Bolts & Ignition Coils Electrical Harness Connectors

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• Remove bolts - 1  - and - 2  -.
• Disconnect electrical harness connectors at ignition coils.
• Press electrical wiring harness to side.

Fig 8: Removing Ignition Coils Using Ignition Coil Puller T40039

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• Remove all ignition coils using Ignition Coil Puller T40039.
• Using spark plug removal tool 3122 B , remove spark plugs.
• Check compression using compression tester V.A.G 1763.

• Have a second technician press accelerator pedal completely and at the same time operate starter long enough until pressure increase no longer appears on tester.

Assembly is in reverse order of removal, note the following:

• Install spark plugs → 28 - IGNITION/GLOW PLUG SYSTEM .
• As a final step, check Engine Control Module (ECM) DTC memory and erase it, since malfunctions were stored by disconnecting electrical connectors

Torque specifications