Remove/install ignition coils

AR15.12-D-2003C

Remove/install ignition coils

15.11.2019

Engine

111.979 in model 901.0, 902.0, 903.0, 904.0

Engine

111.984 in model 901.6, 902.6, 903.6, 904.6

1

Cylinder head cover trim panel

2

Screw

3

Ignition coil

4

Screw

5

Connector

 

Remove/install

1

Switch off ignition

2

Remove air intake hose

Engine 111.979

AR09.10-D-8030C

Engine 111.984

AR09.10-D-8030F

3

Remove trim panel for cylinder head cover (1)

AR01.20-D-5014-02C

 Bolt, trim panel of cylinder head cover to cylinder head cover

*BA01.20-N-1002-01A

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

4

Remove screw/bolts (4)

Topical note

Notes on avoiding damage to ignition system

AH15.10-P-0002-01D

 Ignition coil to cylinder head cover

*BA15.10-N-1001-01A

5

Remove connector (arrows) from the primary side (terminal 1/15) and secondary side (ignition line) from the ignition coils (3). Then remove the ignition coils (3) from the spark plugs (arrow).

 Installation:
When attaching the ignition coils (3), ensure the ignition lines are laid correctly. Firing order 1342.
Each ignition coil supplies two spark plugs with high voltage. Cylinder 1+4 and cylinder 2+3 always ignite simultaneously.

6

Install in the reverse order

 Crankcase ventilation, cylinder head cover

Number

Designation

Engine 111.948/978/979/984

BA01.20-N-1002-01A

Bolt, trim panel of cylinder head cover to cylinder head cover

Nm

9

 Ignition system

Number

Designation

Engine 111.979/984

BA15.10-N-1001-01A

Ignition coil to cylinder head cover

Nm

9