Mercedes-Benz ML320. Manual — part 429

ENGINE 113 in MODELS 129, 163, 202, 203, 208, 209, 210, 211, 215, 220, 230

Fig. 121: Identifying Basic Bore Of Valve Seat Ring (Intake) And Basic Bore Of Valve Seat Ring
(Exhaust)

Modification notes

25.2.04

Value changed from
0.084...0.110 mm to
0.074...0.1 mm

Figure in BE05.30-P-1004-03C for
engine 112.910/911 modified

*BE05.30-P-1004-
03C

25.2.04

Value changed from
0.084...0.110 mm to
0.074...0.1 mm

Figure revised in BE05.30-P-1004-03C
in case of engine
112.912/914/915/920/921/922/923/940/
941/942/943/944/945/946/947/948/960/
961, 113.940/941/942/943/944

*BE05.30-P-1004-
03C

25.2.04

Value changed from
0.084...0.110 mm to
0.074...0.1 mm

Figure revised in BE05.30-P-1004-03C
in case of engine
113.960/961/962/963/965/967/968/
980/981/982/984/987/988/990/991 /992

*BE05.30-P-1004-
03C

Remove/install

1

Remove valves

AR05.30-P-3511AV

2

Inspect valve guide inner
diameter for wear

If the measurements

obtained for the valve
guide are not within the
specified tolerance ?

AR05.30-P-3731-06AV

2004 Mercedes-Benz ML350

1998-2005 ENGINE Engine timing - 163 Chassis

me

Test values for valve seat rings

Replace valve guide.

AR05.30-P-3731AV

3

Turn valve seat ring out of
the cylinder head with
ring seat turning tool

Pay attention to

operating instructions of
ring seat turning tool.

*WE58.40-Z-1009-21A

*WE58.40-Z-1010-21A

4

Measure diameter of valve
seat ring basic bore (D1,
D2) in the cylinder head

Overlap between valve

seat ring and basic bore
must be assured.

*BE05.30-P-1006-03C
*BE05.30-P-1007-03C
*BE05.30-P-1004-03C

If the measurements
obtained deviate from the
test
values: ? machine basic
bores to the next oversize
of the valve seat rings
Pay attention to inspection
and machining
dimensions of the valve
seat rings and of the basic
bore ?

Inspection and machining
dimensions of valve seat
rings

AR05.30-P-3831-03AV

Risk of injury to skin and
eyes caused by handling
hot or glowing objects.

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

AS00.00-Z-0002-01A

5

Heat cylinder head in
recirculated heating
cabinet or heating oven

Temperature approx.

80 °C

*WH58.30-Z-1001-28A

*WH58.30-Z-1003-28A

8

Drive in valve seat ring
using a suitable drift

9

Machine valve seat rings

After installing a new

valve seat ring, the valve
must always be replaced.

AR05.30-P-4511AV

10

Install in the reverse order

Number

Designation

Engine 112.910/
911

Engine 112.912/
914/915/920/
921/922/923/
940/941/942/
943/944/945/

2004 Mercedes-Benz ML350

1998-2005 ENGINE Engine timing - 163 Chassis

me

Test values for valve seat rings

Commercially available tools

Workshop equipment

946/947/948/
951/960/961,
113.940/941/94
2/943/944

BE05.30-P-
1004-03C

Valve seat ring -
overlap in
cylinder head

Intake

mm

0.084...0.115

0.084...0.115

Exhaust

mm

0.074...0.100

0.074...0.100

BE05.30-P-
1006-03C

Basic bore
diameter of inlet
valve seat rings
in cylinder head

Standard

mm

31.000...31.016

37.000...37.016

Rep. size 1

mm

32.000...32.016

38.200...38.216

BE05.30-P-
1007-03C

Basic bore
diameter of
exhaust valve
seat rings in
cylinder head

Standard

mm

35.000... 35.016

42.000... 42.016

Rep. size 1

mm

36.200...36.216

43.200...43.216

Number

Designation

Engine
113.960/
961/962/963/
964/965/967/
968/971/980/
981/982/984/
987/988/990/
991/992/993/
995

BE05.30-P-1004-
03C

Valve seat ring - overlap in cylinder head

Intake

mm 0.084...0.115

Exhaust

mm 0.074...0.100

BE05.30-P-1006-
03C

Basic bore diameter of inlet valve seat rings in
cylinder head

Standard mm 39.000...39.016
Rep. size
1

mm 40.200...40.216

BE05.30-P-1007-
03C

Basic bore diameter of exhaust valve seat rings in
cylinder head

Standard mm 44.000...44.016
Rep. size
1

mm 45.200...45.216

Number

Designation

WH58.30-Z-1001-28A

Recirculated air warming cabinet

WH58.30-Z-1003-28A

Heating oven

WE58.40-Z-1009-21A

Valve seat turning device

WE58.40-Z-1010-21A

Valve seat turning device

2004 Mercedes-Benz ML350

1998-2005 ENGINE Engine timing - 163 Chassis

me

MEASURE VALVE SETBACK TO CYLINDER HEAD - AR05.30-P-4100-01AV

Modification notes

Test and adjustment values of cylinder head

Test and adjustment values of cylinder head

Workshop equipment

Shown on engine 606

1. Measure valve setback (a) with depth caliper gage.

25.3.04

Value changed from 8.50...8.90
mm to 8.05...8.45 mm

Value in series 1001, exhaust valve, for engine
113.962/982/987/990/991/993 changed

25.3.04

Value changed from 7.90...8.30
mm to 7.20...7.60 mm

Value in series 1001, intake valve, for engine
113.962/982/987/990/991/993 changed

Number

Designation

Engines 112,
113.940/941/
942/943/944/
945/946/948
except 112.976

Engine 112.976

BE01.30-P-
1001-02D

Valve setback of
new valves and
new valve seat
rings

Exhaust valve

mm

8.05...8.45

8.50...8.90

Intake valve

mm

7.60...8.00

7.90...8.30

Number

Designation

Engine
113.960/961/
963/965/966/
967/968/980/
981/984/986/
992/995

Engine 113.987/
988/989/
990/991/
993

BE01.30-P-
1001-02D

Valve setback of
new valves and
new valve seat
rings

Exhaust valve

mm

8.5...8.9

8.05...8.45

Intake valve

mm

7.90...8.30

7.20...7.60

WE58.40-Z-1002-19A

Depth gage

2004 Mercedes-Benz ML350

1998-2005 ENGINE Engine timing - 163 Chassis

me