Remove/install camshaft positioner of exhaust camshaft

AR05.20-P-7207MSA

Remove/install camshaft positioner of exhaust camshaft

09.10.2018

Engine

256.9 in model 213, 238, 257, 290

2

Camshaft positioner for exhaust camshaft

5b

Exhaust camshaft locking pin

4

Exhaust 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-5702MSA

2

Move camshafts to basic position.

AR05.20-P-6010MSA

3

Mark exhaust camshaft camshaft positioner (2) with exhaust camshaft locking pin (5b).

 Assembly tool

*256589023100

4

Remove exhaust camshaft control valve (4).

 The exhaust camshaft control valve (4) has left-hand thread.

 Socket wrench bit

*177589000900

5

Remove exhaust camshaft camshaft positioner (2).



Install

6

Install exhaust camshaft camshaft positioner (2).

7

Tighten exhaust camshaft control valve (4).



Specified engine oils (service) - Overview

BB00.40-P-0223-02A

 Wet thread and bolt head contact surface of the exhaust camshaft control valve (4) with engine oil.
Tighten exhaust camshaft control valve (4) evenly without discontinuity using the specified torque.
The exhaust camshaft control valve (4) has left-hand thread.

 Central valve on camshaft positioner

*BA05.10-P-1001-01MRT

 Socket wrench bit

*177589000900

8

Remove the camshaft's fixing device.

 Locating tool

*256589002300

9

Remove exhaust camshaft locking pin (5b).

 Assembly tool

*256589023100

10

Turn engine in the direction of engine rotation by two revolutions and set the cylinder 1 piston 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

11

Check basic position of camshafts.

AR05.20-P-6010MSA

12

Install rear cap on cylinder head.

AR01.30-P-5702MSA

 Camshaft positioner, timing chain drive

Number

Designation

Engine 256.9

BA05.10-P-1001-01MRT

Central valve on camshaft positioner

Nm

120 (+10)