Remove/install camshaft positioner of intake camshaft

AR05.20-P-7206MSC

Remove/install camshaft positioner of intake camshaft

18.12.2018

Engine

256.9 in model 167

1

Camshaft positioner for intake camshaft

5a

Intake camshaft locking pin

2

Camshaft positioner for exhaust camshaft

5b

Exhaust camshaft locking pin

3

Intake camshaft control valve

 Caution

Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil

Wear protective gloves, protective clothing and safety glasses.
Do not fill engine oil into beverage containers.

AS18.00-Z-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A



Remove

1

Remove rear cover at cylinder head.

AR01.30-P-5702MSC

2

Move camshafts to basic position.

AR05.20-P-6010MSC

3

Delimit intake camshaft camshaft positioner (1) and exhaust camshaft camshaft positioner (2) with intake camshaft locking pin (5a) and exhaust camshaft locking pin (5b).

 Assembly tool

*256589023100

4

Remove intake camshaft control valve (3).

 Socket wrench bit

*177589000900

5

Remove intake camshaft camshaft positioner (1).



Install

6

Install intake camshaft camshaft positioner (1).

7

Wet thread and bolt head contact surface of intake camshaft control valve (3) with engine oil.



Specified engine oils (service) - Overview

BB00.40-P-0223-02A

8

Tighten intake camshaft control valve (3).

 Tighten intake camshaft control valve (3) uniformly without interruption with specified torque.

 Central valve on camshaft positioner

*BA05.10-P-1001-01MRT

 Socket wrench bit

*177589000900

9

Remove the camshaft's fixing device.

 Locating tool

*256589002300

10

Remove intake camshaft locking pin (5a) and exhaust camshaft locking pin (5b).

 Assembly tool

*256589023100

11

Turn engine in direction of engine rotation by two revolutions and set piston of cylinder 1 to ignition TDC.


Turn engine only in the direction of engine rotation.
Engine damage will occur otherwise.

 The TDC marking on the vibration damper must match with marking on crankcase.

 Counterholder

*654589004000

12

Check basic position of camshafts.

AR05.20-P-6010MSC

13

Install rear cap on cylinder head.

AR01.30-P-5702MSC

 Camshaft positioner, timing chain drive

Number

Designation

Engine 256.9

BA05.10-P-1001-01MRT

Central valve on camshaft positioner

Nm

120 (+10)