Remove/install front cap on cylinder head

AR01.30-P-5700MT

Remove/install front cap on cylinder head

18.02.2020

Engine

270 in model 117, 156, 176, 242, 246.2

1

Front cover

1a

Bolts

1s

Bolts

2

Cylinder head

3

Cylinder head cover

Y49/1

Intake camshaft solenoid

Y49/2

Exhaust camshaft solenoid

 

Remove/install

1

Remove right engine mount

AR22.10-P-1102NKB

2

Unclip coolant vent line at air intake pipe and place to one side

3

Disconnect electrical connections on intake camshaft solenoid (Y49/1) and on exhaust camshaft solenoid (Y49/2)

4

Remove screw/bolts (1a, 1s) on front cover (1)

 Bolt, front cover to cylinder head/cylinder head cover

*BA01.30-P-1003-01Y

5

Carefully unfasten front cover (1) at the press off points and pull off to the front

Notes on sealant path for front cover to cylinder head xxx

AH01.30-P-1000-02MR

 Installation: Apply sealant to front cover (1).

Sealant, Loctite 5970, 50 ml

*BR00.45-Z-1013-01A

 Application gun

*112589002500



Clean

6

Clean sealing surfaces on cylinder head (2), cylinder head cover (3) and front cover (1)

AR01.00-P-0050-01A


Do not use any sharp-edged tools or abrasive paper.
The sealing surfaces can be damaged otherwise.

Loctite 7200

*BR00.45-Z-1038-04A

Loctite 7063 (400 ml) cleaning spray

*BR00.45-Z-1046-04A

7

Remove intake camshaft solenoid (Y49/1) or exhaust camshaft solenoid ( Y49/2) from front cover (1)

Only when replacing front cover (1).

AR05.20-P-7295MT

8

Install in the reverse order



Check

9

Check engine oil level and correct if necessary



Engine 270.910 in model 117, 156, 176, 246.2

AP18.00-P-0101NK



Engine 270.920 in model 117, 156, 176, 242, 246.2

AP18.00-P-0101NL

 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

10

Carry out engine test run while checking engine for proper operation and oil leaks

 Cylinder head

Number

Designation

Engine 270

BA01.30-P-1003-01Y

Bolt, front cover to cylinder head/cylinder head cover

M6

Nm

9

M8

Nm

19

Repair materials

Number

Designation

Order number

BR00.45-Z-1013-01A

Sealant, Loctite 5970, 50 ml

A 003 989 98 20 10

BR00.45-Z-1038-04A

Loctite 7200

Henkel AG & Co. KGaA
http://www.loctite.de

BR00.45-Z-1046-04A

Loctite 7063 (400 ml) cleaning spray

A 001 986 71 71 09