Spark Plug: Service and Repair

03 - Service Procedures

Spark Plugs, Replacing

• Replacing spark plugs, 2.5L gasoline fuel injection engines

Special tools, testers and auxiliary items required

• Spark plug wrench (3122 B)





• Puller (T40039)





• Removal/installation tool (T10029)





• Torque wrench (V.A.G 1331)





• Spark Plug Connector Pliers (V.A.G 1922)





• Puller (T10112)





• Puller (T10094 A)





• Seal puller (T10118)








Spark Plugs, 2.5L, Replacing





Removing

• To pull off spark plugs, place ignition coil puller (T40039) on uppermost thick rib - arrow - of ignition coils with power output stages.

• If lower ribs are used, these can be damaged

- Remove engine cover.

Spark plugs are located under ignition coils with power output stages.





- Pull out all ignition coils with power output stages - 1 - upward using ignition coil puller (T40039).

• Lines or connectors of ignition coils may remain connected when pulling out ignition coils with power output stages.

• Note installation position of ignition coils with power output stages!

- Set ignition coils with power output stages (with lines connected) carefully to the side.

CAUTION!
Make sure wires are not kinked or damaged.





- Remove spark plugs with spark plug removal tool ( 3122 B).

Installing

- Install new spark plugs using the spark plug removal tool (3122 B) and tighten to 20 Nm.

- Guide ignition coils with power output stages into cylinder head and align ignition coils to designated recesses of cylinder head cover.

- Press ignition coils with power output stages on to spark plugs up to stop, they must engage audibly.

• Make sure that wiring of ignition coils with power output stages is routed properly.

- Install engine cover.