Replace spark plugs
WARNING:
Hot surfaces.
Risk of burning!
Risk of burning!
- Perform all work only on components that have cooled down.
Preliminary work
- Refer to REMOVING THE RIGHT COVER IN THE ENGINE COMPARTMENT .
- Refer to REMOVING THE COVER IN THE LEFT ENGINE COMPARTMENT .
- Refer to REMOVING TRAILING LINK AT TENSION STRUT TOWER .
- Refer to REMOVING THE SOUND INSULATION ON THE BULKHEAD UPPER PART AT THE CENTER .
- Refer to REMOVING THE ACOUSTIC COVER .
- Refer to REMOVING CORROSION PROTECTION COVER .
- Refer to REMOVE IGNITION COILS .
Removing all spark plugs
WARNING:
Hot surfaces.
Risk of burning!
Risk of burning!
- Perform all work only on components that have cooled down.
CAUTION:
Swirling dirt particles caused by compressed air.
Injury hazard!
Injury hazard!
- Collect dirt particles, e.g. when blowing out, use cloth to do so.
- Wear safety goggles.
NOTE:
TECHNICAL INFORMATION
Clean spark plug slot with compressed air.
The spark plug shaft must be cleaned using compressed air after having removed the ignition coils and before removing the spark plugs. After having removed the spark plugs, once again check the sealing surface for contamination and (if necessary) clean using a moist cloth or clean using compressed air.
Deposits that are not removed according to instructions may enter the combustion chamber and lead to uncontrolled combustion. Remaining deposits on the spark plug sealing surfaces may lead to leaks and the spark plugs may come loose during engine operation.
Spark plug threads must not be greased or oiled. Insufficiently tightened spark plugs may cause leaks and the sparks plugs may come loose during engine operation.
Clean spark plug slot with compressed air.
The spark plug shaft must be cleaned using compressed air after having removed the ignition coils and before removing the spark plugs. After having removed the spark plugs, once again check the sealing surface for contamination and (if necessary) clean using a moist cloth or clean using compressed air.
Deposits that are not removed according to instructions may enter the combustion chamber and lead to uncontrolled combustion. Remaining deposits on the spark plug sealing surfaces may lead to leaks and the spark plugs may come loose during engine operation.
Spark plug threads must not be greased or oiled. Insufficiently tightened spark plugs may cause leaks and the sparks plugs may come loose during engine operation.
NOTE:
TECHNICAL INFORMATION
Exclusively swiveling extensions may be used for the reversible ratchet. Rigid mounting tool and variable plug connections with rigid option may not be used; there is a risk that the insulator breaks.
Exclusively swiveling extensions may be used for the reversible ratchet. Rigid mounting tool and variable plug connections with rigid option may not be used; there is a risk that the insulator breaks.
- Unscrew the spark plugs with the special tool 0 495 560 (12 1 220) and an extension.
Installing all spark plugs
NOTE:
TECHNICAL INFORMATION
Exclusively swiveling extensions may be used for the reversible ratchet. Rigid mounting tool and variable plug connections with rigid option may not be used; there is a risk that the insulator breaks.
Exclusively swiveling extensions may be used for the reversible ratchet. Rigid mounting tool and variable plug connections with rigid option may not be used; there is a risk that the insulator breaks.
- Insert spark plug (1) into special tool 0 496 065 (12 1 230).
NOTE:
TECHNICAL INFORMATION
Do not drop spark plug into spark plug shaft! This can lead to a reduction of the electrode gap and can thus impair smooth running of the engine, especially in idle position.
Do not drop spark plug into spark plug shaft! This can lead to a reduction of the electrode gap and can thus impair smooth running of the engine, especially in idle position.
- First screw spark plug into engine using special tool 0 496 065 (12 1 230) until it is hand-tight.
- Tighten spark plugs with torque wrench, special tool 0 495 560 (12 1 220) and extension with joint.
TIGHTENING TORQUE SPECIFICATIONS
| Spark plugs | ||
|---|---|---|
| M12x1.25 | Tightening torque | 23 Nm |
Follow-up work
- Refer to INSTALLING THE IGNITION COILS .
- Refer to INSTALLING CORROSION PROTECTION COVER .
- Refer to INSTALLING SOUND INSULATION AT THE CENTER OF THE BULKHEAD UPPER PART .
- Refer to REMOVING/INSTALLING TRAILING LINK AT TENSION STRUT TOWER
- Refer to INSTALLING THE COVER IN THE ENGINE COMPARTMENT ON THE LEFT .
- Refer to INSTALLING THE COVER IN THE ENGINE COMPARTMENT ON THE RIGHT .
- Refer to INSTALLING ACOUSTIC COVER .