Mercedes-Benz: engine M272, M273. Service manual — part 3

Installation:

Align dowel pin (18) for

pulse wheel (12) with fitted bore (20) in
camshaft adjuster (16).

17

Lift timing chain and detach camshaft

Installation:

Lubricate contact surfaces

adjuster (16) forwards from the intake

to intake camshaft (4) and camshaft

camshaft (4)

adjuster (16) before the mounting camshaft
adjuster (16).

Installation:

Align color coding (25) on

camshaft adjuster (16) and timing chain with
each other. Align dowel pin (21) in camshaft
adjuster (16) with fitted bore (22) in intake
camshaft (4).

18

Install in the reverse order
Checking

Risk of accident

Secure vehicle to prevent it from moving by

Danger!

caused by vehicle starting

AS00.00-Z-0005-01A

off by itself when engine is running. Risk of itself.
injury

Wear closed and snug-fitting work clothes.

caused by contusions and burns

during starting procedure or when working

Do not touch hot or rotating parts.

near the engine as it is running

19

Conduct engine test run and check engine
for leaks

Camshaft, camshaft adjustment

Number

Designation

Engine

Engine

272

273

BA05.20-P-1009-02A

Center valve for pulse wheel/

Nm

145

145

camshaft adjuster to camshaft

Страница 3 из 3

© Daimler AG, 07.04.13, G/07/14, ar05.20-p-7201ewe, Remove/install camshaft adjusters
ENGINES 272, 273 in MODEL 212 On intake camshafts

AR01.30-P-5700EWL

Remove/install front cover on cylinder head

2.3.10

ENGINES

272, 273 in MODEL 212

Front cover at left cylinder head

P01.30-2237-08

1

Poly-V-belt

7

Front cover

B6/6

Left exhaust camshaft Hall sensor

2

Poly-V belt tensioning device

7a

Bolts

Y49/4 Left intake camshaft solenoid

3

Coolant thermostat housing

7b

Prying lugs

Y49/6 Left exhaust camshaft solenoid

4

Oil filter housing

5

Power steering expansion reservoir

B6/4

Left intake camshaft Hall sensor

6

Clamp

Remove/install

Information on preventing damage to

AH54.00-P-0001-01A

electronic components due to electrostatic
discharge

1

Turn key in ignition lock to position "0"

2

Remove bottom engine compartment

AR61.20-P-1105EW

paneling

3

Drain coolant at radiator

AR20.00-P-1142EWS

Notes on coolant

AH20.00-N-2080-01A

4

Remove left engine intake air duct and front See Remove air filter housing.

AR09.10-P-1150EWS

engine cover

5

Remove poly-V belt (1) and poly-V belt

AR13.20-P-0001EWS

tensioning device (2)

6

Remove coolant thermostat housing (3)

AR20.10-P-2460EW

7

Remove oil filter housing (4)

AR18.20-P-3471EW

8

Remove expansion reservoir (5)

AR46.25-P-1000EWL

9

Disconnect electrical connectors on left
intake camshaft Hall sensor (B6/4) and left
exhaust camshaft Hall sensor (B6/6)

10

Disconnect electrical connectors on left
intake camshaft solenoid (Y49/4) and left
exhaust camshaft solenoid (Y49/6)

11

Detach clamp (6)

12

Remove bolts (7a) from front cover (7)

*BA01.30-P-1006-01O

13

Carefully loosen front cover (7) on lifting lugs

Pay attention to fitted sleeves in area of

(7b) and detach from the front

outer threaded connections (arrows).

Installation: Apply sealant to the front

cover (7).

Notes on sealant path for front cover to

AH01.30-P-1000-02V

cylinder head

*112589002500

Loctite sealant 5970

*BR00.45-Z-1013-01A

Clean

14

Clean sealing surfaces on cylinder head, on

AR01.00-P-0050-01A

Do not use any sharp-edged tools or

cylinder head cover and on front cover (7)

abrasive paper as this will damage the
sealing surfaces.
Loctite 7200

*BR00.45-Z-1038-04A

Cleaning spray, Loctite 7063 (150ml)

*BR00.45-Z-1046-04A

Страница 1 из 2

© Daimler AG, 07.04.13, G/07/14, ar01.30-p-5700ewl, Remove/install front cover on cylinder head
ENGINES 272, 273 in MODEL 212 Front cover at left cylinder head

15

Detach left intake camshaft Hall sensor

When replacing the front cover (7)

(B6/4) and left exhaust camshaft Hall sensor
(B6/6) from front cover (7)

*BA15.10-P-1002-03E

16

Detach left intake camshaft solenoid (Y49/4) When replacing the front cover (7)
and left exhaust camshaft solenoid (Y49/6)
from front cover (7)

*BA15.10-P-1003-03E

17

Install in the reverse order

Checking

Risk of accident

Secure vehicle to prevent it from moving by

Danger!

caused by vehicle starting

AS00.00-Z-0005-01A

off by itself when engine is running. Risk of itself.
injury

Wear closed and snug-fitting work clothes.

caused by contusions and burns

during starting procedure or when working

Do not touch hot or rotating parts.

near the engine as it is running

18

Conduct engine test run and check engine
for leaks

Cylinder head

Number

Designation

Engine

Engine

272

273

Bolt, front cover to cylinder head

M6

Nm

9

9

BA01.30-P-1006-01O

Position sensor

Number

Designation

Engine

Engine

272

273

BA15.10-P-1002-03E

Bolt, camshaft Hall sensor to front cover on cylinder head

Nm

8

8

BA15.10-P-1003-03E

Bolt, camshaft solenoid to front cover

Nm

8

8

to cylinder head

112 589 00 25 00

Squeeze gun

Repair materials

Number

Designation

Order number

BR00.45-Z-1013-01A

Loctite sealant 5970

A 003 989 98 20

BR00.45-Z-1038-04A

Loctite 7200

Henkel Loctite Deutschland GmbH
Arabellastrasse 17
81925 Mьnchen
Germany
Tel. +49 899268-0
Fax + 49 899101978
www.Loctite.de

BR00.45-Z-1046-04A

Cleaning spray, Loctite 7063 (150ml)

A 001 986 71 71 10

Страница 2 из 2

© Daimler AG, 07.04.13, G/07/14, ar01.30-p-5700ewl, Remove/install front cover on cylinder head
ENGINES 272, 273 in MODEL 212 Front cover at left cylinder head

AR01.30-P-5700EWR

Remove/install front cover on cylinder head

2.3.10

ENGINES

272, 273 in MODEL 212

Front cover at right cylinder head

P01.30-2238-08

1

Air shutoff valve

4b

Prying lugs

Y32

Air pump switchover valve

2

Bracket

Y49/5

Right intake camshaft solenoid

2a

Bolts

B6/5

Right intake camshaft Hall sensor

Y49/7

Right exhaust camshaft solenoid

3

Hose

B6/7

Right exhaust camshaft Hall sensor

4

Front cover

4a

Screw

5

Bolts

6

Bracket

6a

Bolts

6b

Screw

Y125

Low-temperature circuit shutoff valve

P01.30-2319-11

Remove/install

Information on preventing damage to

AH54.00-P-0001-01A

electronic components due to electrostatic
discharge

1

Turn key in ignition lock to position "0"

2

Remove bottom engine compartment

AR61.20-P-1105EW

paneling

3

Remove front engine cover

Pull the front engine cover upward and

out of the mountings.

4

Remove right engine intake air duct

See "Remove air filter housing".

AR09.10-P-1150EWS

5

Remove air shutoff valve (1) at the right

Except model 212.057

AR14.30-P-7200EW

cylinder head

6

Remove bolts (2a) and set bracket (2) for

Except model 212.057

front engine cover with air pump switchover
valve (Y32) to one side

Do not detach lines at the air pump

switchover valve (Y32).

*BA01.30-P-1009-01O

7

Remove hose (3)

Except model 212.057

Страница 1 из 3

© Daimler AG, 07.04.13, G/07/14, ar01.30-p-5700ewr, Remove/install front cover on cylinder head
ENGINES 272, 273 in MODEL 212 Front cover at right cylinder head