Remove/install cylinder head cover

AR01.20-P-5014B

Remove/install cylinder head cover

24.6.10

 

Remove/install



 External torx set

*001589760900

 Torx bit set

*000589011000

1

Remove engine trim panel

2

Remove air filter housing (1).

3

Remove resonance body (2)

4

Remove the resonance tube (3) with hot film mass air flow sensor



At this time pull out the hot film mass air flow sensor plug.

 Removal:

Pay attention to the mounting projection of the resonance tube (3)!

All except model 163 with engine 113.942/981

AR07.07-P-1454A

Model 163 with engine 113.942/981

AR07.07-P-1454MV

5

Unbolt dipstick guide tube of
automatic transmission

6

Unbolt ignition coils (6, 7) at cylinder head covers

AR15.12-P-2003A



*BA01.20-P-1002-01E

7

Disconnect spark plug connectors



Pay attention to markings for spark plug connectors on cylinder head covers and ignition coils



*110589010100

8

Detach the vacuum hoses at connections (8, 9) of the cylinder head covers

9

Detach crankcase ventilation hose at cylinder head cover fitting (10)

 Only on left side.

 Danger!

Risk of explosion caused by ignition of flammable products, risk of poisoning caused by inhaling fuel vapors or swallowing fuel as well as risk of injury to skin and eyes exposed to fuel.

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

Wear protective clothing when handling fuel.

AS47.00-Z-0001-01A

10

Disconnect fuel line at fuel rail



Only in case of vehicles with a non-flexible fuel line.

Release fuel pressure through service valve!

 Pressure hose

*119589046300



*BA07.52-P-1001-01A



*BA07.52-P-1001-01A

11

Remove cylinder head covers (4, 5)



*BA01.20-P-1001-01E

 Installation:

Ensure cylinder head cover gasket is correctly installed.

AR01.20-P-5014-01B

12

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

13

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
112.951/
976

Engine 112.960/
961 AMG

BA07.52-P-1001-01A

Fuel feed line to fuel distributor

Nm

38

38

24

35

Number

Designation

Engine 113.987

Engine 113.990/
991

Engine
113.992/
993/995

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

BA07.52-P-1001-01A

Fuel feed line to fuel distributor

Nm

38

38

38

38