Measure cylinder bores

AR01.40-W-9202C

Measure cylinder bores

31.7.07

18.7.06

Tightening torque added.

Step 2

*BA01.60-N-1003-01M



Removing

1

Remove cylinder head for cylinder in question

AR01.30-W-5800C

2

Attach turning device for engine

AR03.30-W-1600-03C



*BA01.60-N-1003-01M



*904589046300

3

Position piston in cylinder liner to be inspected (4) at bottom dead center

4

Thoroughly clean cylinder liner (4)

 Cover piston crown.

5

Clean oil scraper ring (5) in cylinder liner (4)

 Only for vehicles with code (MS4) BlueTec 4 or with code (MS5) BlueTec 5.

6

Assess honing pattern in the cylinder liner (4)

 If honing pattern cannot be assessed clearly:



Establish wear and measure cylinder bores.



Notes for evaluation of a cylinder barrel

AH01.40-N-0001-03A



Measure

7

Adjust dial indicator (1) and quick calipers for inside measurements (2) with the outside micrometer (3) to the smallest inside diameter of the read off tolerance group of the cylinder liner (4) and set dial indicator (1) to "0"

 Read off code letter A, B or C at liner edge of cylinder liner (4).

Adjust quick calipers for inside measurements (2) to have an additional
5 mm preload.

*BE01.40-N-1001-03J



*001589532100

8.1

Measure inside diameter and difference in diameter of cylinder liner (4) at upper reversal point of first piston ring (arrow)

Vehicles without code (MS4) BlueTec 4 or without code (MS5) BlueTec 5

 Conduct measurements in both measuring directions (A and B).

*BE01.40-N-1001-03J

The specifications must be maintained. The cylinder liner (4) must not be reworked;



*BE01.40-N-1002-03J

replace cylinder liner (4) if necessary.

AR01.40-W-9324C

8.2

Measure inside diameter and difference in diameter of cylinder liner (4) under shoulder (arrow) of the oil scraper ring (5)

Vehicles with code (MS4) BlueTec 4 or with code (MS5) BlueTec 5

 Conduct measurements in both measuring directions (A and B).

*BE01.40-N-1001-03J

The specifications must be maintained. The cylinder liner (4) must not be reworked;



*BE01.40-N-1002-03J

replace cylinder liner (4) if necessary.

AR01.40-W-9324C



Install

9

Detach turning device for engine

 The cranking device must be removed before starting engine.

AR03.30-W-1600-03C



*BA01.60-N-1001-01M



*904589046300

10

Install cylinder head

AR01.30-W-5800C

Number

Designation

Engine
457.9

BE01.40-N-1001-03J

Cylinder liner inside Ø

Code letter A

mm

127.990 to 127.995

Code letter B

mm

127.995 to 128.005

Code letter C

mm

128.005 to 128.010

BE01.40-N-1002-03J

Wear of cylinder liner

Top reversal point of first piston ring

mm

0.08

Number

Designation

Engine 457.9

BA01.60-N-1001-01M

Bolt, inspection hole cover to timing case

Nm

25

BA01.60-N-1003-01M

Bolt, turning device to timing case

Nm

25