Mercedes-Benz ML320. Manual — part 424

Model 215.373/375

2

Mount cylinder head
(1) onto the assembly
board (2) with the
associated insertion
plate (3)

Insert insertion plate (3) with

arrow indicating the direction of
travel (insertion plate) (4) pointing
to the front and, according to the
cylinder head, for the right or left
side into the assembly board (2).
i004 Mount cylinder head (1)with its
front end pointing to the arrow
indicating the direction of travel
(assembly board) (5) with one bolt
(6) each at the front and rear onto
the assembly board (2). The cylinder
head (1) can be mounted on the
assembly board (2) without
removing the exhaust manifold.

Assembly board

Fig. 92

3

Attach assembly tool
(valves) (7) to
cylinder head (1) and
position vertically at
the valve disk (top)
(8)

Use parts 2, 3, 4, 5, 7, 14, 19

from the valve assembly tool case
(valves) (7).

Valve assembly tools case

Fig. 89

4

Remove valve disk
(upper) (8) and valve
disk (lower) (11)

Press valve spring (9) together

with assembly tool (valves) (7),
remove split valve spring retainer
locks (10)

Check valve disk (top) (8) and

valve disk (bottom) (11) for
formation of burrs, replace if
necessary.

The valve springs (9) of the inlet

valves and exhaust valves are
identical.

Magnetic pin

Fig. 95

Magnetic finger

Fig. 90

5

Use pliers (15) to
remove valve stem
seals (12)

Installation: Fit protective sleeve

for valve stem seal (13) onto valve
stem. Oil valve stem seal (12) and
press on with drift (16). The
protective sleeve for the valve stem
seal (13) must be removed from the
valve stem after pressing on the
valve stem seal (12).

Pliers

Fig. 77

2004 Mercedes-Benz ML350

1998-2005 ENGINE Engine timing - 163 Chassis

me

Drift

Fig. 78

6

Remove cylinder head
(1) from assembly
board (2)

Risk of explosion
and poisoning caused
by the melting down
or improper handling
of sodium-filled
valves. Risk of injury
caused by skin contact
with sodium resulting
in heat or chemical
burns.

Do not open sodium-filled valves.
Wear protective gloves and safety
glasses when handling damaged
valves.

AS05.30-Z-0001-01A

7

Remove valve (14)

Installation: Check surface of

valve stems for roughness and
formation of ridging (visual
inspection or with a nail). Replace
valves (14) with a rough stem
surface or formation of burrs. Grind
new or reused valves (14) with valve
grinding compound before
installation.

Disposal of sodium-
filled valves

Exhaust valves with sodium filling

OS05.30-P-0001-01A

Checking

8

Check valves (14)

Intake and exhaust valves must

not be machined.

If the specified tolerances are

below the required limit, the valve
(14) must be replaced to ensure
functioning.

AR05.30-P-4201-
01AV

Valve disk ø

*BE05.30-P-1001-
01E

Valve disk height

*BE05.30-P-1002-
01E

Valve seat angle (a)

*BE05.30-P-1003-
01E

Valve stem ø

*BE05.30-P-1004-
01E

Valve length

*BE05.30-P-1005-
01E

9

Inspect valve guides,
replace if necessary

AR05.30-P-3731AV

10

Install in the reverse

2004 Mercedes-Benz ML350

1998-2005 ENGINE Engine timing - 163 Chassis

me

Check values for valves

Check values for valves

order

Number

Designation

Engine
113.940/941/
942/943/944

Engine
113.960/
961/962/963/
965/967/968/
980/981/982/
984/987/988/
990/991/992/
993/995

BE05.30-P-
1001-01E

Valve disk ø

Exhaust

mm

41 ±0.1

43±0.1

Intake

mm

36±0.1

38±0.1

BE05.30-P-
1002-01E

Valve disk
height

Exhaust when
new

mm

1.6

1.6

Intake when new mm

1.2

1.2

BE05.30-P-
1003-01E

Valve seat
angle

(a Exhaust)

Angle°

45±15'

45±15'

Intake

Angle°

45°15'

45±15'

BE05.30-P-
1004-01E

Valve stem ø

Exhaust

mm

6.970

6.970

Intake

mm

6.975

6.975

BE05.30-P-
1005-01E

Valve length

Exhaust

mm

122.25±0.2

121.80±0.2

Intake

mm

119.40±0.2

119.10±0.2

Number

Designation

Engine
112.910/911

Engine
112.912/913/
914/915/920/
921/922/923/
940/941/942/
943/944/945/
946/947/948/
949/960

BE05.30-P-
1001-01E

Valve disk ø

Exhaust

mm

34±0.1

41±0.1

Intake

mm

30±0.1

36±0.1

BE05.30-P-
1002-01E

Valve disk
height

Exhaust when
new

mm

1.6

1.6

Intake when new mm

1.2

1.2

BE05.30-P-
1003-01E

Valve seat
angle (a)

Exhaust

Angle°

45 (+15')

45 (+15')

Intake

Angle°

45 (+15')

45 (+15')

BE05.30-P-
1004-01E

Valve stem ø

Exhaust

mm

6.970

6.970

Intake

mm

6.975

6.975

BE05.30-P-
1005-01E

Valve length

Exhaust

mm

121.65±0.2

122.25±

Intake

mm

120.70±0.2

119.40±0.2

2004 Mercedes-Benz ML350

1998-2005 ENGINE Engine timing - 163 Chassis

me

Fig. 92: Identifying Assembly Board (112 589 11 59 00)

Fig. 93: Identifying Case For Valve Installation Tools (111 589 25 61 00)

Fig. 94: Identifying Magnetic Finger (116 589 06 63 00)

Fig. 95: Identifying Magnetic Pin (210 589 00 40 00)

2004 Mercedes-Benz ML350

1998-2005 ENGINE Engine timing - 163 Chassis

me