Introduction
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.
Tools
- 
                  
                  - 
            Unscrew the 6 T50 screws by hand or using a wrench and a socket. 
- 
            Lift and put aside the engine hood. 
 
- 
            
- 
                  
                  - 
            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. 
 
- 
            
- 
                  
                  - 
            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. 
 
- 
            
Congratulations ! You replaced you spark plugs/ignition coils !
2 comments
Coucou Antonio, recois-tu mes mails ?
Fra San -
Coucou, je reçois bien tes mails à l'adresse suivante:
[email protected]