Remove/install cylinder head cover

AR01.20-P-5014BV

Remove/install cylinder head cover

24.6.10

 

Remove/install

1.1

Remove engine trim panel with integrated air filter (1)

 Unclip covering on front side of engine. Remove air filter by pulling vertically up and off the cylinder head covers.

1.2

Remove air filter

Model 170.466,

Model 203.065/265,

Model 211.076/276,

Model 215.374, 220.074/174,

Model 230.474

AR09.10-P-1150SVK

2.1

Unscrew guide tube for the automatic transmission oil dipstick

Except model 170

Model 203, 209.375,

Model 208,

Model 211.061/065/070,

Model 230.475

3

Detach right ignition coils (4), left ignition coils (5) on right cylinder head cover (2) and left cylinder head cover (3)

Except engines 112.911/914/915/917/954,

Engine 113.969

AR15.12-P-2003A



*BA01.20-P-1002-01E

4

Disconnect spark plug connectors

 Installation: Observe marking for spark plug connectors on the cylinder head covers and ignition coils.

 Double open-ended wrench

*110589010100

5

Pull off vent hoses on right connector (6) and on left connector (7) of the right cylinder head cover (2) and left cylinder head cover (3)

6

Pull off engine vent hose on left connector (8) of left cylinder head cover (3)

 Danger!

Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel and risk of injury to eyes and skin caused by contact with fuel

No fire, sparks, open flames or smoking.
Only pour fuels into suitable and appropriately marked containers.

Wear protective clothing when handling fuel.

AS47.00-Z-0001-01A

7.1

Disconnect fuel line at fuel rail

 Only on vehicles with rigid fuel line and:

Model 211.061/065/070/076/276,

Model 215.374,

Model 220.074,

Model 230.474/475

Release fuel pressure through service valve!

 Engine 112

*BA07.52-P-1001-01A

 Engine 113

*BA07.52-P-1001-01A

 Pressure hose

*119589046300

8

Remove right cylinder head cover (2) and left cylinder head cover (3)

 Installation: Check cylinder head covers for leaks, see: 

Ensure cylinder head cover gasket is correctly installed

AR01.20-P-5014-01B



*BA01.20-P-1001-01E

9

Install in the reverse order

 Danger!

Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running

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

AS00.00-Z-0005-01A

10

Check for leaks with engine running

Number

Designation

Engine 112

Engine 113

BA01.20-P-1001-01E

Cylinder head cover bolt

Stage 1

Nm

9

9

Stage 2

°

-

-

BA01.20-P-1002-01E

Bolt, ignition coils to cylinder head cover

Nm

8

8

Number

Designation

Engine
112 except
112.945/951/
960/961

Engine
112.945

Engine 112.960/
961 AMG

BA07.52-P-1001-01A

Fuel feed line to fuel distributor

Nm

38

38

35

Number

Designation

Engine
113.940/941/
942/943/944/
945/946/948/
960/961/962/
963/964/965/
966/967/968/
969/971/980/
981/982/984/
986/988

Engine 113.987

Engine 113.990/
991

Engine
113.992/
993/995

BA07.52-P-1001-01A

Fuel feed line to fuel distributor

Nm

38

38

38

38