1
Accessing the engine hood
- Open the trunk.
- Remove the trunk carpets.
Sparks plugs and/or ignition coils replacement
Applicable to H4D and H4Bt engines (M281 E10 and M281 E09)
It is advisable to do this operation on a cold engine.
Recommendations :
Replace every: 60,000km/4 years (Iridium) or 20,000km (Copper/Nickel).
Electrode gap: 0.8mm (varies depending on the spark plug model considered)
H4Bt: Iridium spark plugs mandatory.
H4D: you may favor Iridium spark plugs if using E85.
See Wiki for more info.
Инструменты (1)
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Пошаговая инструкция
1
Extracting ignition coils
- Disconnect and put aside the oil vapors duct.
- Disconnect the ignition coils' connector.
- Unscrew each 8mm bolts of the 3 ignition coils.
- Gently extract the ignition coils.
2
Acessing the engine compartment
- Unscrew the 6 screws by hand or with a T50 socket.
- Lift and set aside the engine hood.
2
Extracting the spark plugs
- Unscrew and extract the spark plugs using a 14mm spark plug socket.
- Clean off and/or dust off the debris in the zone to avoid contamination in the cylinders.
- The Nickel/Copper spark plug shown aside is around 25.000km aged, using 100% E85.
3
Installating the new spark plugs
- Torque the new spark plug using a 14mm spark plug socket at 24 N.m.
- Verify and ajust the spark plug gap to the considered model's spec if necessary.
- The RTA (French Revue Technique Automobile) and spark plug manufacturers advise not to grease the spark plug's thread.
- Do not modify an used spark plug's gap.
4
Reinstalling the ignition coils
- Put back the ignition coils on the spark plugs.
- Torque each of the 3 ignition coils' 8mm bolts at 10 N.m.
- Reconnect the ignition coil's connectors.
Завершение
Congratulations ! You replaced you spark plugs/ignition coils !
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