Mercedes-Benz: engine M272, M273. Manual — part 2

7

Remove spark plugs (R4) from the cylinder

Installation: It is essential to adhere to

heads using spark plug wrench (01)

the tightening torque as it influences the
position of the spark plug electrodes in the
cylinder.
An incorrect tightening torque causes
misfires which can lead to damage to the
engine and catalytic converter damage

*BA15.10-P-1001-01C

Spark plug to cylinder head

*112589010900

Motor 272, 273

Spark plug wrench

*278589000900

Motor 157, 276, 278

Spark plug wrench

8

Install in the reverse order

Spark plugs

Number

Designation

ENGINE 157

ENGINE 272

BA15.10-P-1001-01C

Spark plug to cylinder head

Nm

23

23

Spark plugs

Number

Designation

ENGINE 273

ENGINE 276

BA15.10-P-1001-01C

Spark plug to cylinder head

Nm

23

23

Spark plugs

Number

Designation

ENGINE 278

BA15.10-P-1001-01C

Spark plug to cylinder head

Nm

23

272 589 01 33 00

112 589 01 09 00

278 589 00 09 00

Puller

Spark plug wrench

Spark plug wrench

Страница 2 из 2

© Daimler AG, 07.04.13, G/07/14, ap15.10-p-1580ew, Replace spark plugs
ENGINE 157, 272, 273, 276, 278 in MODEL 212 ENGINE 157, 276, 278 in MODEL 218 ENGINE 272, 273, 276, 278 in MODEL 207

AR05.20-P-6992EW

Remove/install camshafts

22.9.10

ENGINES 272, 273 in MODEL 212

1

Camshaft adjuster for intake camshaft

2

Auxiliary bearing cap of intake
camshaft

3

Intake camshaft

4

Auxiliary bearing cap of exhaust
camshaft

5

Exhaust camshaft

P05.20-2270-06

Remove/install

The ground line on the battery must always Model 212.057

be detached before beginning work on the
fuel system otherwise pressure will be lost in
the fuel system through opening a vehicle
door or the trunk lid

Remove intake camshafts

1

Remove respective camshaft adjusters (1)

AR05.20-P-7201EWE

2

Remove auxiliary bearing cap (2) and intake

*BA05.20-P-1010-02A

camshaft (3)

Remove exhaust camshafts

3

Remove respective camshaft adjusters

AR05.20-P-7201EWA

4

Remove respective cylinder head cover

Right cylinder head cover, except model

AR01.20-P-5012EL

212.057
Right cylinder head cover, model 212.057

AR01.20-P-5012ELD

Left cylinder head cover, except model

AR01.20-P-5013EL

212.057
Left cylinder head cover, model 212.057

AR01.20-P-5013ELD

5

Take off auxiliary bearing cap (4) and

*BA05.20-P-1010-02A

remove exhaust camshaft (5)

6

Install in the reverse order
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

7

Conduct engine test run and check engine
for leaks

Camshaft, camshaft adjustment

Number

Designation

Engine

Engine

272

273

BA05.20-P-1010-02A

Bolt, auxiliary bearing cap to cylinder Stage 1

Nm

8

8

head

°

Stage 2

-

-

Страница 1 из 1

© Daimler AG, 07.04.13, G/07/14, ar05.20-p-6992ew, Remove/install camshafts
ENGINES 272, 273 in MODEL 212

AR05.20-P-7201EWE

Remove/install camshaft adjusters

28.11.11

ENGINES 272, 273 in MODEL 212
On intake camshafts

P05.20-2246-09

1, 2

Exhaust camshaft

11, 12 Pulse wheel for intake camshaft

24

Tensioning rail

3, 4

Intake camshaft

15, 16 Camshaft adjuster for intake

25

Color coding

camshaft

7, 8

Center valve of intake camshaft

26, 27 Cap

15

Camshaft adjuster for intake camshaft

18

Dowel pin

19

Pin

20

Bore in camshaft adjuster

P05.20-2248-04

21

Dowel pin in camshaft adjuster

22

Fitted bore for intake camshaft

P05.20-2249-10

Remove/install

The ground line on the battery must always Type 212.057

be detached before beginning work on the
fuel system otherwise pressure will be lost in
the fuel system through opening a vehicle
door or the trunk lid

1

Remove air filter housing

AR09.10-P-1150EWS

Страница 1 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

2

Remove chain tensioner

AR05.10-P-7800EW

Installation: Install new chain

tensioner. The previously installed chain
tensioner must not be reinstalled because
during removal, its pressure pin is pressed
into the end position. The thrust pin latch
prevents this return stroke. This would
overstretch the timing chain on reinstalling.

Removal on right cylinder head

3

Remove camshaft adjuster for right exhaust

AR05.20-P-7201EWA

camshaft (1)

4

Remove cap (26)

5

Detach center valve (7)

AR05.20-P-7201-06VA

Observe loosening direction.

Installation:

The center valve (7)

may only be tightened when chain tensioner
is removed, otherwise this can lead to
malfunctioning of camshaft adjustment.

*BA05.20-P-1009-02A

6

Remove right cylinder head cover

Except model 212.057

AR01.20-P-5012EL

Type 212.057

AR01.20-P-5012ELD

7

Mark timing chain relative to the camshaft

Engine positioned at 40° crankshaft angle

adjuster (15) using color codes (25)

after ignition TDC.

Installation:

Check position of intake

camshaft (3) based on color coding (25).

8

Remove tensioning rail (24)

AR05.10-P-8127EW

9

Remove center valve (7) and pulse wheel

Check dowel pin (18) and pin (19). If a

(11)

dowel pin (18) or pin (19) is sheared off then
this must be removed from camshaft
adjuster (15).

Installation: Always replace pulse wheel

(11). When tightening center valve (7) there
is a risk that dowel pin (18) or pin (19) may
shear off at pulse wheel (11).

Installation:

Lubricate center valve (7) at

contact surface with pulse wheel (11) before
assembly.

Installation:

Align dowel pin (18) on

pulse wheel (11) with bore (20) in camshaft
adjuster (15).

10

Lift timing chain and pull off camshaft

Installation:

Lubricate contact surfaces

adjuster (15) from intake camshaft (3)

to intake camshaft (3) and camshaft

towards the front

adjuster (15) before mounting camshaft
adjuster (15).

Installation:

Align color coding (25) on

camshaft adjuster (15) and timing chain with
each other. Align dowel pin (21) in camshaft
adjuster (15) with fitted bore (22) in intake
camshaft (3).

Removal on left cylinder head

11

Remove camshaft adjuster for exhaust

AR05.20-P-7201EWA

camshaft (2)

12

Remove cap (27)

13

Detach center valve (8)

AR05.20-P-7201-06VA

Observe loosening direction.

Installation:

Tightening of center valve

(8) may only take place for a removed chain
tensioner. Malfunctions of camshaft
adjustment can occur otherwise.

*BA05.20-P-1009-02A

14

Remove cylinder head cover

Except model 212.057

AR01.20-P-5013EL

Type 212.057

AR01.20-P-5013ELD

15

Mark timing chain relative to camshaft

Engine positioned at 40° crankshaft angle

adjuster (16) using color codes (25)

after ignition TDC.

Installation:

Check position of intake

camshaft (4) based on color coding (25).

16

Remove center valve (8) and pulse wheel

Check dowel pin (18) and pin (19). If a

(12)

dowel pin (18) or pin (19) is sheared off then
this must be removed from camshaft
adjuster (16).

Installation: Always replace pulse wheel

(12). When tightening center valve (8) there
is a risk that dowel pin (18) or pin (19) may
shear off at pulse wheel (12).

Installation:

Lubricate center valve (8) at

contact surface with pulse wheel (12) before
assembly.

Страница 2 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