Remove/install camshafts

AR05.20-P-6992MFD

Remove/install camshafts

11.02.2020

Engine

282 in model 118, 177, 247

Modification notes

21.10.2019

Document completely revised.

1

Bearing cap

3

Bearing bridge

5

Bearing bridge

2

Pin

4

Pin

E

Intake camshaft

6

Bearing cap

A

Exhaust camshaft

C

Sealing surfaces

7

Bearing cap

Shown on model 177, 247 with code ME08 (Hybrid drive 75-84 KW VARIANT (INCLUDING PLUGIN))

8

Electrical line

9

Bolts

10

Cover

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

 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

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AS00.00-Z-0035-01A

 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

General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment

AH00.00-Z-0300-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

Notes on technical cleanliness when working on high-voltage on-board electrical system

Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AH54.00-P-0004-01RFW

Topical note

Notes on battery

AH54.10-P-0001-01A



Remove

1.1

Remove the vacuum pump.

Engine 282 in model 118, 177, 247
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR43.05-P-1320MFD

1.2

Remove power electronics.

Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR08.20-P-0011MFH

2

Remove electric line (8) from cap (10).

Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

3

Unscrew bolts (9), remove cap (10) and seal.

Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

4

Remove timing chain.

AR05.10-P-7602MFD

5

Remove camshaft positioner of the intake camshaft (E) and exhaust camshaft (A).

If the exhaust, intake camshaft (A, E) will be replaced.

Camshaft positioner for exhaust camshaft

AR05.20-P-7207MFD

Camshaft positioner of intake camshaft

AR05.20-P-7206MFD

6

Remove locating tool of exhaust, intake camshaft (A, E) from cylinder head.

If camshaft positioner was removed.

 Locating tool

*282589002300

7

Mark installation position of bearing bridges (3, 5) and bearing caps (1, 6, 7).

8

Remove screws of bearing caps (1) at intake camshaft (E) in reverse order to tightening procedure, remove bearing caps (1) with bearing bridge (3) and intake camshaft (E).

Tightening procedure for camshaft bearing bridges

AR05.20-P-6992-01MFD

9

Remove screws of bearing caps (6, 7) at exhaust camshaft (A) in reverse order to tightening procedure, remove bearing caps (6, 7) with bearing bridge (5) and exhaust camshaft (A).

Tightening procedure for camshaft bearing bridges

AR05.20-P-6992-01MFD

10

Check bearing caps (1, 6, 7), bearing bridges (3, 5), counterparts in cylinder head, roller-type rocker arms as well as intake camshaft (E) and exhaust camshaft (A) for wear and damage.

General information on checking camshafts and bearing points of camshafts

AH05.20-P-1000-09SZ

Diameter of camshaft bearing journal

*BE05.20-P-1001-03G

If a problem is determined in the bearing caps (1, 6, 7) or bearing bridges (3, 5) and/or counterparts in the cylinder head,



replace cylinder head and affected intake camshaft (E) or exhaust camshaft (A).

AR01.30-P-5800MFD

If a problem is determined in the roller-type rocker arms and intake camshaft (E) and/or exhaust camshaft (A),



replace affected roller-type rocker arms and intake camshaft (E) or exhaust camshaft (A).

AR05.00-P-2500MFD



Clean

11

Clean bearing cap (7) and cylinder head in area of sealing surfaces (C).

AR01.00-P-0050-01A


Sealing surfaces (C) must be free from machining residues, anti-corrosion agents and be dry, free from dust, oil and grease.
Otherwise, adhesion problems will occur.

Loctite 7200

*BR00.45-Z-1038-04A

Loctite 7063 (400 ml) cleaning spray

*BR00.45-Z-1046-04A



Install

12

Apply sealing bead with a diameter of 1.5 mm on sealing surfaces (C) on underside at rear bearing cap (7).

Notes on application of flange sealants to seal major assemblies

AH00.00-P-0500-01MNE


Observe a processing time of max. 13 min and a temperature range between 7 °C and 25 °C.
Leaks can occur otherwise.

Loctite 5970 adhesive

*BR00.45-Z-1101-02A

13

Position exhaust camshaft (A), bearing caps (6, 7) and bearing bridge (5) in cylinder head and slightly tighten screws by hand as per tightening procedure and then fully tighten.

Tightening procedure for camshaft bearing bridge

AR05.20-P-6992-01MFD



Specified engine oils (service) - Overview

BB00.40-P-0223-02A


Oil compensating elements and camshaft bearing points.
Journal (4) of exhaust camshaft (A) must be aligned with groove between bearing cap (6) and bearing bridge (5) as shown in figure (arrow).
Otherwise, the exhaust camshaft (A) is at risk of breakage.

 Observe marking of bearing bridge (5) and bearing caps (6, 7).

 Engine 282 in model 118, 177, 247
with code 936 (Cylinder cut-out system)
Install exhaust camshaft (A) in the "full-lift" position.

 Screw/bolt, camshaft bearing cap to cylinder head

*BA05.20-P-1001-05B

14

Position intake camshaft (E), bearing cap (1) and bearing bridge (3) in cylinder head and slightly tighten screws by hand as per the tightening pattern and then fully tighten.

Tightening procedure for camshaft bearing bridges

AR05.20-P-6992-01MFD



Specified engine oils (service) - Overview

BB00.40-P-0223-02A


Lubricate compensating elements and camshaft bearing points.
Journal (2) of intake camshaft (E) must be aligned with groove between bearing cap (1) and bearing bridge (3) as shown in figure (arrow).
Otherwise, the intake camshaft (E) is at risk of breakage.

 Observe marking of bearing bridge (3) and bearing cap (1).

 Engine 282 in model 118, 177, 247
with code 936 (Cylinder cut-out system)
Install intake camshaft (E) in the "full-lift" position.

 Screw/bolt, camshaft bearing cap to cylinder head

*BA05.20-P-1001-05B

15

Attach locating tool of exhaust, intake camshaft (A, E) to cylinder head.

 Locating tool

*282589002300

16

Install camshaft positioner of the intake camshaft (E) and exhaust camshaft (A).

If exhaust, intake camshaft (A, E) was replaced.

Camshaft positioner for exhaust camshaft

AR05.20-P-7207MFD

Camshaft positioner of intake camshaft

AR05.20-P-7206MFD

17

Install timing chain.

AR05.10-P-7602MFD

 Only install lower engine compartment lining and upper engine cover after leak test.

18

Remove locating tools at crankshaft and exhaust, intake camshaft (A, E).

 Locating tool

*282589002300

19

Install cap (10) with seal and tighten bolts (9).

Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

 Replace seal.

 M6

*BA00.10-P-1002-01A

20

Attach electric line (8) at cap (10).

Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

21.1

Install the vacuum pump.

Engine 282 in model 118, 177, 247
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR43.05-P-1320MFD

21.2

Install power electronics.

Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR08.20-P-0011MFH

 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

22

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

23

Install lower engine compartment lining.

AR61.20-P-1105MFA

24

Install upper engine cover.



AP01.10-P-2405-01D

Check values for camshaft bearing

Number

Designation

Engine 282

BE05.20-P-1001-03G

Diameter of camshaft bearing journal

Standard size

Inlet

mm

25,954...25,970

Outlet

mm

25,954...25,970

 Headless screws: bolts and nuts, coarse-pitch thread

Number

Designation

Model all (4xWD, CAR, smart)

BA00.10-P-1002-01A

M6

8.8

Galvanized

Nm

9

Phosphated

Nm

9

10.9

Galvanized

Nm

13

Phosphated

Nm

12

12.9

Galvanized

Nm

16

Phosphated

Nm

14

 Camshaft, camshaft adjustment

Number

Designation

Engine 282

BA05.20-P-1001-05B

Screw/bolt, camshaft bearing cap to cylinder head

Stage 1

Nm

10

Stage 2

Nm

10

Repair materials

Number

Designation

Order number

BR00.45-Z-1038-04A

Loctite 7200

Henkel AG & Co. KGaA
http://www.loctite.de

BR00.45-Z-1046-04A

Loctite 7063 (400 ml) cleaning spray

A 001 986 71 71 09

BR00.45-Z-1101-02A

Loctite 5970 adhesive

Henkel AG & Co. KGaA
http://www.loctite.de