Scania 16 litre engine. Work Description - part 13

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Cylinder block

General tightening torques

Specified tightening torques apply with a 
tolerance of +/- 15% unless specified otherwise.

The following tightening torques apply in general 
unless otherwise specified:

Flange bolt M6

8.6 Nm

Flange bolt M8

26 Nm

Flange bolt M10

50 Nm

Flange bolt M12

92 Nm

Stud in casting M8

13 Nm

Stud in casting M10

25 Nm

Cylinder block

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Overhaul of the cylinder block

Heat arising from the main bearings seizing and 
rotating in the cylinder block will change the 
properties of the material in the cylinder block. 
These cylinder blocks must be discarded.

If the main bearing seizes but does not rotate in 
the cylinder block, the cylinder block can be 
overhauled. The main bearing seats must 
comply with the demands on roundness given in 
the table. Machining out-of-round main bearing 
seats is something we do not recommend.

Tightening torques

1

Measure the diameter at four different 
positions as illustrated. The diameter must 
be measured with the main bearing caps 
tightened and without main bearings. Even 
the side bolts must be tightened.

2

Compare the dimensions with those in the 
table.

Main bearing cap bolts

90 Nm+90

°

Side bolts

180 Nm

113 584

Minimum permitted 
diameter

Maximum permitted 
diameter

Greatest permitted 
difference between the 
largest and smallest 
diameter on the same main 
bearing seat.

112.200 mm

112.222 mm

0.016 mm

Cylinder block

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Cylinder liner

Removing

Special tools

1

Mark the cylinder liners with the numbers 
1-8. The mark should be facing front. The 
mark is necessary so that the liners can be 
refitted in the same place and position as 
previously.

Note: The mark must be made only on the 
surface indicated in the illustration. Other 
surfaces are for sealing.

Number

Designation

Illustration

Tool board

99 066

Cylinder liner extractor

D2

11

5

 7

39

2

Remove the cylinder liner using cylinder 
liner extractor 99 066.

Cylinder liner extractor with hydraulic cylinder

99 003

100040

99 066

3

Remove the sealing ring in the cylinder 
block.

Cylinder liner

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Fitting

1

Make sure the interior of the cylinder block 
is clean. Clean the O-ring surfaces.

2

Carefully check the cylinder liners, both 
new and old, for cracks that can arise during 
transport or careless handling. Tap the liner 
carefully with a metal object. It should give 
a clear metallic ring if it is intact. If it is 
cracked, it will sound "cracked".

3

Fit the cylinder liner without O-rings and 
check the cylinder liner height as described 
in Measuring the cylinder liner height.

4

Remove the cylinder liner.

5

Lubricate the O-rings that seal between the 
cylinder liner and the engine block with 
glycerine or unscented soap and fit them.

6

Lubricate the lower guide surface on the 
cylinder liner.

7

Turn the liner with the stamped cylinder 
number facing forward and carefully tap it 
down with a rubber mallet.

Cylinder liner