Remove/install camshaft positioner

AR05.20-P-7204MRK

Remove/install camshaft positioner

24.02.2020

Engine

264, 274.9 in model 167

Modification notes

05.02.2020

Mark position of timing chain relative to corresponding camshaft positioner, added.

Step 5

05.02.2020

Check toothing of camshaft positioner for damage and wear, added.

Step 9

1

Camshaft positioner

2

Control valves

3

Timing chain

4

Camshafts

5

Hold-down tool

6

Bracket

 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

 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

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

 

Remove/install

1.1

Remove engine air intake duct upstream of air filter.

Engine 274.9 in model 167

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

1.2

Remove right charge air line and place charge air cooler towards front with connected lines.

Engine 264 in model 167

AR09.41-P-6817MRK

 Installation: Only install right charge air line and charge air cooler after checking basic position of camshafts (4).
Install top engine cover, install front and center bottom engine compartment lining only after the leak test.

2

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

Engine 274.9 in model 167

AR01.20-P-5014MRM

Engine 264 in model 167

AR01.20-P-5014MRK

4

Install hold-down tool (5) with brackets (6).


 Holding device not suitable for bringing camshafts (4) into position.
This results in damage to brackets (6) and incorrect timings.


It must be possible to mount and install brackets (6) without pressure.
This will otherwise damage camshafts (4) and result in incorrect timings.

 Socket

*270589010700

 Holding device

*270589016100

5

Mark position of timing chain (3) relative to corresponding camshaft positioner (1).

6

Remove the chain tensioner.

AR05.10-P-7800MRK

7

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

Topical note

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

AH00.00-P-0020-01A



Specified engine oils for Cars, Vans (service) - Overview

BB00.40-P-0223-02A

 Installation: Wet thread and bolt head contact surface of control valve (2) with engine oil.
Tighten control valve (2) uniformly without interruption to specified torque.

 Engine 274.9 in model 167Center valve, pulse wheel/camshaft adjuster to camshaft

*BA05.20-P-1002-02K

 Engine 264 in model 167Control valve of pulse wheel/camshaft positioner to camshaft

*BA05.20-P-1002-05A

 Socket wrench bit

*177589000900

8

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

 Installation: Observe marking.



Check

9

Check toothing of camshaft positioner (1) for damage and wear.

If there is a problem,



Replace camshaft positioner (1).

10

Install in the reverse order.



Check

11

Check basic position of camshafts (4).

AR05.20-P-6010MRK

 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

12

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

 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

 Camshaft, camshaft adjustment

Number

Designation

Engine 264

BA05.20-P-1002-05A

Control valve of pulse wheel/camshaft positioner to camshaft

Stage 1

Nm

18

Stage 2

°

45