Remove/install camshafts

AR05.20-P-6992MRD

Remove/install camshafts

24.02.2020

Engine

274.9 in model 213

Engine

274.9 in model 238

Modification notes

15.10.2019

Mark assembly position of the intake camshaft and exhaust camshaft on the cylinder head, added.

Operation step 2

15.10.2019

Check intake camshaft and exhaust camshaft for condition and wear, added.

Operation step 6

1

Exhaust camshaft

2

Intake camshaft

 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

 

Remove/install

1

Remove camshaft positioners and then remove the attached hold-down tool together with the holding devices.

AR05.20-P-7204MRD

2

Mark assembly position of the intake camshaft (2) and exhaust camshaft (1) at the cylinder head.


Do not mix up assembly position of the intake camshaft (2) and exhaust camshaft (1).
Engine damage could occur otherwise.

3

Remove hold-down tools of the intake camshaft (2) and exhaust camshaft (1).

 Bolt for camshaft hold-down tool

*BA05.20-P-1001-02K

4

Remove intake camshaft (2).



Specified engine oils (service) - Overview

BB00.40-P-0223-02A

 Installation:
Wet roller-type rocker arms and camshaft bearing points with engine oil. Insert intake camshaft (2) so that the cams at cylinder 1 point upward at an angle.
Otherwise, the intake camshaft (2) or exhaust camshaft (1) will be damaged.

 Installation: Observe markings.

5

Remove exhaust camshaft (1).



Specified engine oils (service) - Overview

BB00.40-P-0223-02A

 Installation:
Wet roller-type rocker arms, the vacuum pump drive, and the camshaft bearing points with engine oil. Insert exhaust camshaft (1) so that the cams at cylinder 1 point upward at an angle.
Otherwise, the intake camshaft (2) or exhaust camshaft (1) will be damaged.

 Installation: Observe markings.



Check

6

Check intake camshaft (2) and exhaust camshaft (1) for condition and wear.

General information on checking camshafts and bearing points of camshafts

AH05.20-P-1000-09SZ

If there is a problem,



Replace intake camshaft (2) or exhaust camshaft (1).

7

Check diameters of the camshaft bearing journals for wear.

Diameter of camshaft fitted bearing journal

*BE05.20-P-1002-03E

If the wear limit is reached,



Replace intake camshaft (2) or exhaust camshaft (1).

8

Install in the reverse order.

Check values for camshaft bearing

Number

Designation

Engine 274
except code A14 (Camtronic)

Engine 274
with code A14 (Camtronic)

BE05.20-P-1002-03E

Diameter of camshaft fitted bearing journal

Standard size

mm

31,947...31,963

31,947...31,963

 Camshaft, camshaft adjustment

Number

Designation

Engine 274

BA05.20-P-1001-02K

Bolt for camshaft hold-down tool

Nm

28