Spark Plug: Service and Repair

WM 287020 Removing and installing spark plugs

Tools





Technical values





Preliminary work

CAUTION

Hot components

- Risk of burns

-> Let hot components cool down.
-> Wear personal protective gear.

1. Remove rear wheels.
-> 44051900 Removing and installing wheel - section on "Removing" 44051900 Removing and installing wheel.
2. Remove upper part of heat shield.
-> 261219 Removing and installing heat shield - section on "Removing".
3. Remove ignition coils.
-> 282020 Removing and installing ignition coils - section on "Removing" Service and Repair.

Removing spark plugs

NOTICE

Broken spark plug electrodes

- Bits of electrodes can fall into the combustion chamber

-> Only check electrode gap of spark plugs, but do not bend them.
-> Spark plugs with an incorrect electrode gap must be replaced.

Component overview:





Spark plugs





NOTICE

Incorrect tool

- Risk of damage to components

-> Use prescribed tool.

1. Unscrew spark plugs -3- using spark-plug socket wrench Nr.14 and extension Nr.15.

Installing spark plugs

1. Fit spark plugs.

NOTICE

Incorrect tool

- Risk of damage to components

-> Use prescribed tool.

Tools: Use spark-plug socket wrench Nr.14 and extension Nr.15.
1.1. Fit spark plugs and tighten to the prescribed tightening torque.
1.2. New spark plug:
=> Tightening torque: 32 Nm (24 ftlb.)+/-2 Nm (+/-1.5 ftlb.)
1.3. Reinstalled spark plug:
=> Tightening torque: 25 Nm (19 ftlb.)+3 Nm (+2 ftlb.)

Subsequent work

1. Install ignition coils.
-> 282020 Removing and installing ignition coils - section on "Installing" Service and Repair.
2. Install upper part of heat shield.
-> 261219 Removing and installing heat shield - section on "Installing".
2.1. Fit and tighten two external Torx screws (E10, M6 x 12).
=> Tightening torque: 10 Nm (7.5 ftlb.)
3. Fit rear wheels.
-> 44051900 Removing and installing wheel - section on "Installing" 44051900 Removing and installing wheel.