Mercedes-Benz ML320. Manual — part 777

BT27.50-P-0010-01A

Piston B2 changed

Transmission 722.6 phased in

k

TRANSMISSION 722.6## ## as of 0552036 as of 1.8.97

P27.60-2009-02

14d Sealing ring
27

Pistons

To improve the piston guide and avoid the piston jamming the position of the sealing
ring (14d) on the piston (27) was changed.

Copyright DaimlerChrysler AG 28.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

Page 1

AR03.10-P-7311-01V

Measure end clearance of piston rings

Modification notes

12.6.02

Value in line 1001 for Engine 113.967 modified from
0.012...0.060 to 0.033...0.07 and from 0010...0.030 to
0.01...0.04

Value in BE03.10-P-1001-05B for Engine
113.967 modified

*BE03.10-P-1001-05B

Test values for piston rings

Number

Designation

Engine 112.910/
911/912

Engine 112.920/
921/922/923/940/
941/942/943/944/
945/946/947/948/
960,
113.940/941/942/
943

Engine 113.944/
980/981/982/984

BE03.10-P-1001-05B

Vertical clearance of
piston ring

Groove 1

mm

0,012...0,060

0,012...0,060

0,012...0,060

Groove 2

mm

0,010...0,030

0,010...0,030

0,010...0,030

Test values for piston rings

Number

Designation

Engine 113.960/
961/962/963/965/
968

Engine
113.967

BE03.10-P-1001-05B

Vertical clearance of
piston ring

Groove 1

mm

0,012...0,060

0,033...0,070

Groove 2

mm

0,010...0,030

0,01...0,04

Commercially available tools (see Workshop Equipment Manual)

Number

Designation

Make (e.g.)

Order number

WH58.30-Z-1008-12A

Feeler gage

Stiefelmayer
D-73734 Esslingen

59

P03.10-2034-01

1

Use the

feeler gage to measure end clearance of compression rings between

compression ring and mounting groove in the piston; replace compression rings or piston, if
necessary.

The end clearance of the oil scraper ring cannot be checked because of its three-part

design. If the compression rings are replaced, the oil scraper ring must also be replaced.

Copyright DaimlerChrysler AG 20.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

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AR03.10-P-7311-02V

Measure gap clearance of piston rings

Test values for piston rings

Number

Designation

Engine 112.910/
911/912

Engine 112.920/
921/922/923/940/
941/942/943/944/
945/946/947/948/
960,
113.940/941/942/
943

Engine 113.944/
980/981/982/984

BE03.10-P-1002-05B

Piston ring gap clearance Groove 1

mm

0,200...0,350

0,200...0,350

0,200...0,350

Groove 2

mm

0,200...0,400

0,200...0,400

0,200...0,400

Test values for piston rings

Number

Designation

Engine 113.960/
961/ 962/ 963/
965/ 968/

Engine
113.967

BE03.10-P-1002-05B

Piston ring gap clearance Groove 1

mm

0,200...0,350

0,200...0,350

groove 2

mm

0,200...0,400

0,200...0,400

Commercially available tools (see Workshop Equipment Manual)

Number

Designation

Make (e.g.)

Order number

WH58.30-Z-1008-12A

Feeler gage

Stiefelmayer
D-73734 Esslingen

59

P03.10-2035-01

1

Clean cylinder contact surface.

2

Insert the two compression rings one after the other into the unworn area of the cylinder

wall and measure end clearance with

feeler gauge; replace piston rings, if necessary.

The gap clearance of the oil scraper ring cannot be checked because of its three-part

design. If the compression rings are replaced, the oil scraper ring must also be replaced.

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AR03.10-P-7311BV

Remove/install piston rings

2.7.97

ENGINE

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

ENGINE

112 /945, 113.962 /982

P03.10-2022-06

1

Compression ring (plain compression
ring)

2

Compression ring ( taper-faced hook
scraper ring)

3

Oil scraper ring

4

Piston

5

Piston crown

Fig. item, etc.

Work instructions

4

Remove/install pistons

AR03.10-P-7021AV

1, 2, 3

Piston rings

transmission

Pliers

*000589513700

Removal:

Oil scraper ring

with the pliers.

The oil scraper ring (3) must be removed and
installed by hand.

Installation:

Compression rings

- Measure width of compression rings (1, 2).

*BE03.10-P-1003-05B

- Pay attention to installation position of

compression rings (1, 2). The inscription
"Top" or the manufacturer's designation
must point toward the piston crown (5).

1, 2

Measure the side clearance of the
compression rings

AR03.10-P-7311-01V

1, 2

Measure end gap of the compression rings

AR03.10-P-7311-02V

Test values for piston rings

Number

Designation

Engine 112.910/
911/912

Engine 112.913

Engine 112.920/
921/922/923/940/
941/942/943/944/
945/946/947/948/
960,
113.940/941/942/
943

BE03.10-P-1003-05B

Dimension

Plain compression ring

mm

83.2 X 1.5 X 3.1

89.9 X 1.5 X 3.1

89.9 X 1.5 X 3.1

Taper-faced hook
scraper ring

mm

83.2 X 3.5 X 3.5

89.9 X 1.75 X 3.5

89.9 X 3.5 X 3.5

Test values for piston rings

Number

Designation

Engine 112.949

Copyright DaimlerChrysler AG 20.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

Page 1