Remove/install ignition coils of left cylinder bank

AR15.12-P-2008MNO

Remove/install ignition coils of left cylinder bank

18.11.2019

Engine

176 in model 167

1

Electrical connector

2

Bolts

3

Electrical connector

4

Bolts

5

Screw

T4/2

Cylinders 5+6 ignition coil

T4/3

Cylinders 7+8 ignition coil

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

 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

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Notes on avoiding damage to ignition system

AH15.10-P-0002-01V

 

Remove/install

1

Remove left air filter housing.

AR09.10-P-1151MNO

2

Release and disconnect electrical connector (1) of cylinder 5+6 ignition coil (T4/2).

3

Remove screws (2).

 Bolt, ignition coil to cylinder head cover

*BA15.10-P-1001-04D

4

Pull cylinder 5+6 ignition coil (T4/2) upwards and remove.

 Cylinder 5+6 ignition coil (T4/2) and spark plug connectors form a unit and can only be removed together.

5

Release and disconnect electrical connector (3) of cylinder 7+8 ignition coil (T4/3).

6

Remove screw (5).

 Bolt, upper heat shield to bracket/side heat shield

*BA09.40-P-1006-01ZA

7

Remove screws/bolts (4).

 Bolt, ignition coil to cylinder head cover

*BA15.10-P-1001-04D

8

Pull cylinder 7+8 ignition coil (T4/3) upwards and remove.

 Cylinder 7+8 ignition coil (T4/3) and spark plug connectors form a unit and can only be removed together.

9

Check cylinder 5+6 ignition coil (T4/2) and cylinder 7+8 ignition coil (T4/3) for damage.

If they will be reused.

If damage is present,



Replace cylinder 5+6 ignition coil (T4/2) and/or cylinder 7+8 ignition coil (T4/3) with spark plug connectors.

10

Discharge approx. Apply about 1  g of spark plug connector grease to the spark plug connector.


Apply spark plug connector grease to reduce pull-off and attachment forces
Otherwise the spark plug connectors will be damaged upon renewed removal.

Spark plug connector grease

*BR00.45-Z-1102-06A

11

Install in the reverse order.



Check

 Warning

Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust.

Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.

AS49.00-Z-0001-01A

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

12

Conduct engine test run while checking for proper operation of the engine.

 Turbocharger

Number

Designation

Engine 176

BA09.40-P-1006-01ZA

Bolt, upper heat shield to bracket/side heat shield

Nm

9

 Ignition coil

Number

Designation

Engine 176

BA15.10-P-1001-04D

Bolt, ignition coil to cylinder head cover

Nm

9

Repair materials

Number

Designation

Order number

BR00.45-Z-1102-06A

Spark plug connector grease

A 002 989 80 51