Remove/install camshaft positioner

AR05.20-P-7204MFC

Remove/install camshaft positioner

18.11.2019

Engine

260 in model 118, 177, 247

Example illustration

01a

Hold-down tool

02a

Holding device

02e

Holding device

1

Camshaft positioner

2

Control valve

3

Timing chain

4

Camshafts

 Warning

Risk of injury. Moving parts can pinch, crush or, in extreme cases even sever extremities.

No parts of the body or limbs should be within the operating area of mechanical components when moving components.

AS00.00-Z-0009-01A

 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

 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

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 cylinder head cover.

AR01.20-P-5014MFC

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

2

Remove front right fender liner.

AR88.10-P-1301MFA

 Installation: Only install front right fender liner after leak test.

3

Turn engine at center bolt of crankshaft in direction of engine rotation to top dead center (ignition TDC) at cylinder 1 .

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

 Socket wrench bit

*001589650900

4

Install hold-down tool (01a) of camshafts (4) with holding devices (02a, 02e) for camshafts (4).

 Ensure use of correct inserts at  holding device (02a, 02e).

 Use inserts with diameter 29 mm.

 Holding device

*270589016100

5

Remove the chain tensioner.

AR05.10-P-7800MFC

6

Release control valve (2) of corresponding camshaft positioner (1).



Specified engine oils (service) - Overview

BB00.40-P-0223-02A

 Installation: Tighten control valves (2) uniformly without interruption to specified torque and tightening angle.

 Installation: Wet thread and bolt head contact surface of control valves (2) with engine oil.

 Center valve, pulse wheel/camshaft adjuster to camshaft

*BA05.20-P-1002-02K

 Holding device

*270589016100

 Socket

*271589001000

7

Lift off timing chain (3) from corresponding camshaft positioner (1) and remove corresponding camshaft positioner (1).

 Mark installation position of timing chain (3) relative to camshaft adjuster (1).

 Installation: Observe markings on installation position of timing chain (3).

8

Check toothing of camshaft positioners (1) for damage.

If there are problems,



replace camshaft adjusters (1).

9

Check timing chain (3) for damage.

If there are problems,



replace timing chain (3).

AR05.10-P-7601MFC

10

Install in the reverse order.



Check

11

Crank engine at center bolt of crankshaft in direction of engine rotation x 2 and position again at top dead center (ignition TDC) at cylinder 1 .

 Socket wrench bit

*001589650900

12

Check basic position of camshafts (4).

AR05.20-P-6010MFC

 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

13

Perform engine test run. While doing so, check engine for proper operation and leak tightness.

14

Install front right fender liner.

AR88.10-P-1301MFA

15

Install upper engine cover.



AP01.10-P-2405-01C

 Camshaft, camshaft adjustment

Number

Designation

Engine 260

BA05.20-P-1002-02K

Center valve, pulse wheel/camshaft adjuster to camshaft

Stage 1

Nm

18

Stage 2

°

45