Remove/install camshaft positioner

AR05.20-P-7204MRD

Remove/install camshaft positioner

13.02.2017

Engine

274.9 in model 213

Engine

274.9 in model 238

01a

Hold-down tool

02a

Holding device

02e

Holding device

1

Camshaft positioner

2

Control valves

3

Timing chain

4

Camshafts

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

 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

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

 

Remove/install

1

Remove engine air intake duct upstream of air filter

2

Rotate engine at crankshaft center bolt in direction of engine rotation to top dead center (TDC) on cylinder 1

 The TDC marking on belt pulley/ vibration damper must be aligned with positioning edge on timing case cover.

 Socket wrench bit

*001589650900

3

Remove cylinder head cover

AR01.20-P-5014MRD

 Installation: Only install upper engine cover after the leak test.

4

Mount hold-down tool (01a) for camshafts (4) with holding devices (02a, 02e) for the camshafts (4)

 Holding device

*270589016100

5

Remove the chain tensioner

AR05.10-P-7800MRD

6

Unfasten control valve (2) for the respective camshaft positioner (1) and remove



Specified engine oils (service) - Overview

BB00.40-P-0223-02A

 Installation: Wet thread and the bolt head contact surface of the control valve (2) with engine oil. Tighten control valve (2) evenly without discontinuity using the specified torque.

 Center valve, pulse wheel/camshaft adjuster to camshaft

*BA05.20-P-1002-02K

 Socket

*271589001000

 Holding device

*270589016100

7

Remove camshaft positioners (1) from camshafts (4)

 The timing chain (3) must be laid on or taken off for assembly or disassembly of the camshaft positioner (1).

8

Install in the reverse order



Check

9

Rotate engine at center bolt of crankshaft in direction of engine rotation twice and place piston for cylinder 1 at top dead center (ignition TDC)

 Socket wrench bit

*001589650900

10

Check basic position of camshafts (4)

If the basic position is not correct



Adjust basic position of camshafts (4).

AR05.20-P-6010MRD

 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 buttoned-up and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

11

Carry out an engine test run, checking the engine for leaktightness and proper operation

12

Install upper engine cover

 Camshaft, camshaft adjustment

Number

Designation

Engine 274

BA05.20-P-1002-02K

Center valve, pulse wheel/camshaft adjuster to camshaft

Stage 1

Nm

18

Stage 2

°

45