Mercedes-Benz ML320. Manual — part 453

*BA07.52-P-
1001-01A

Pressure hose

Fig. 52

12

Remove right and
left ignition coils
(12)

AR15.12-P-
2003A

13

Remove right and
left cylinder head
covers (13)

AR01.20-P-
5014B

14

Remove intake
manifold (14)

Installation: On vehicles with engine

damage, the intake manifold must be examined
for swarfs before assembling and any swarfs
present must be removed, in order to avoid
consequential damage.

The intake manifold system must not be

disassembled.

Remove intake manifold together with fuel

distributor.

AR09.20-P-
1310A

15.1

Remove camshaft
angle position sensor
(15)

Only necessary if right cylinder head is

removed.

AR15.10-P-
2000A

16

Remove poly-V-belt
(8)

Installation: Lock tensioning device with a

drift or pin (diameter 5 mm).

Models 163.154/157/172.

AR13.22-P-
1202B

Models 163.174/175.

AR13.22-P-
1202BA

17

Detach coolant line
(16) at left cylinder
head

6 mm socket hexagon

*WH58.30-Z-
1001-06A

7 mm socket hexagon

*WH58.30-Z-
1002-06A

18.1

Remove inner fender
(9)

Only for engine 113.942 /965 /981.

AR88.10-P-
1300GH

19.1

Remove shield (10)

Only for engine 113.942 /965 /981.

20.1

Remove exhaust
bracket (11)

Only for engine 113.942 /965 /981.
Support exhaust system.

21

Detach exhaust
system at exhaust
manifold

Installation: On vehicles with engine

damage check exhaust system for chips before
assembly and remove any chips present to
prevent later damage

*BA14.10-P-
1002-01B

22

Position crankshaft
to 40° after ignition

The engine must not be turned back;

otherwise the timing chain can get jammed.

AR05.10-P-
6858V

2001 Mercedes-Benz ML320

1998-2005 ENGINE Complete engine - 163 Chassis

me

TDC on first cylinder

Rotate engine at crankshaft in direction of

rotation until 40° marking on belt pulley/
vibration damper is aligned with marking on
timing case cover.
The grooves on the camshafts must be pointing
toward the inner V.

23

Lock camshafts with
locating plate

Locating plate

Fig. 85

Locating plate

Fig. 86

24

Remove chain
tensioner (17)

Model 163.154 /157 with Engine 112.942 /970,
model 163.172 with Engine 113.942.

AR05.10-P-
7800C

Model 163.174/175 with Engine 113.981 /965. AR05.10-P-

7800CA

25.1

Remove oil filter
housing (18) with
oil/water heat
exchanger

Engine 113.942.

AR18.20-P-
3471B

Engines 113.965/981.

AR18.20-P-
3471BA

26

Remove camshaft
sprockets (19)

If the camshaft sprockets are removed, the

engine must no longer be cranked otherwise the
timing chain might jam.

Engines 113.942 /965/981: ?

Tie timing chain tight on both camshaft
sprockets with cable straps.
Engine 112.942 /970: ?
Right-hand camshaft sprocket:
Tie timing chain tight on camshaft sprocket
with cable strap.
Left-hand camshaft sprocket:
Mark camshaft sprocket to timing chain and
remove camshaft sprocket.

It is not possible for the timing chain to

jump across at the crankshaft and balancing
shaft.

After installation: ?

Inspect basic position of camshafts.
If necessary after checking: ?

AR05.10-P-
6858V

Set the basic position of camshafts.

AR05.20-P-
6020AU

Open-end wrench

Fig. 87

Insertion tool

Fig. 88

Torque wrench

Fig. 92

*BA05.20-P-
1001-01B

27

Remove camshaft
bearing bridges (28)

Observe slackening and tightening pattern!

AR05.20-P-
7103AU

2001 Mercedes-Benz ML320

1998-2005 ENGINE Complete engine - 163 Chassis

me

28

Unscrew bolts,
cylinder head -->
timing case cover
(20)

*BA01.40-P-
1002-01C

29

Slacken cylinder
head bolts (21) in
stages, unscrew

Slacken cylinder head bolts according to

loosening pattern only once the engine has
cooled down, in order to avoid that the cylinder
head warps.

AR01.30-P-5800-
09B

Installation: Observe tightening pattern and

tightening instructions of cylinder head bolts.
Oil thread and head contact surface of cylinder
head bolts.

AR01.30-P-5800-
07B

Screwdriver insert

Fig. 72

Screwdriver insert

Fig. 73

*BA01.30-P-
1001-01D

30

Remove cylinder
head

Installation: On Engine 112/113 observe

porous points in the left and right cylinder
head. If porous points are present, sealant must
be applied to the cylinder head gasket.

Notes on application
of sealant to cylinder
head gasket.

Engine 112, 113

AH01.30-P-1000-
04VA

The sealant must be applied within 10

minutes.

Loctite 5900 sealant.

*BR00.45-Z-
1013-01A

31

Inspect version of
cylinder head gasket
Information for
assigning the
cylinder head gaskets

Assignment of cylinder head gasket
Engine 112, 113

AH01.30-P-1000-
06V

32

Check cylinder head
bolts (21)

AR01.30-P-5800-
03B
*BE01.30-P-
1001-04B

33

Clean sealing
surfaces, check for
cracks, shrink holes
and flatness, clean
bolt holes

Pay attention to dowel sleeves (26) for

locating the cylinder head.

Sealing surfaces of crankcase and cylinder

head are provided with an 0.8 mm thick
silicone layer during series production. Silicone
sealant is applied in the gasket area when
carrying out repairs only if shrink holes are
present.

The sealant must be applied within 10

minutes.

*BR00.45-Z-

2001 Mercedes-Benz ML320

1998-2005 ENGINE Complete engine - 163 Chassis

me

Cylinder head/cylinder head bolts

Loctite 5900 sealant.

1013-01A

34

Install in the reverse
order

35

Risk of accident
caused by vehicle
starting off by itself
when engine is
running. Risk of
injury caused by
contusions and burns
during starting
procedure or when
working near the
running engine
Run engine and
inspect for leaks

Secure vehicle to prevent it from moving by
itself.
Wear closed and snug-fitting work clothes.
Do not grasp hot or rotating parts.

AS00.00-Z-0005-
01A

36

Inspect cooling
system for leaks

Warm up engine to operating temperature

and then inspect cooling system or leaks.

AR20.00-P-
1010HA

37

Read fault memory,
erase.

Stored faults which can result from cables

being disconnected or from simulation during
removal and installation or test work, have to
be processed and erased in the fault memories
after completing the work: ?
Diagnosis Manual Volume 2 Index 0:
Connecting and using test equipment.

Number

Designation

Engine
112.910/911/
912/913/914/
915/916/917/
920/921/922/
923/940/941/
942/943/944/
945/946/947/
949/951/953/
954/955/960/
961/970/972/
973/975/976

Engines
113.940/941/
942/943/944/
945/946/948/
960/961/962/
963/964/965/
966/967/968/
969/971/980/
981/982/984/
986/987/988/
990/991/992/
993/995

BE01.30-P-
1001-04B

Cylinder head
bolt

Thread diameter

M 11

11

Length (L) when
new

mm 141.5

141.5

Length (L)

mm < or = 144.5

< or = 144.5

See picture

AR01.30-P-
5800-03B

AR01.30-P-
5800-03B

2001 Mercedes-Benz ML320

1998-2005 ENGINE Complete engine - 163 Chassis

me