Scania 16 litre engine. Work Description — part 7

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25

IMPORTANT! Use torque screwdriver 588 179
to avoid the risk of shearing off the screws. The
entire unit injector must be renewed if the
screws shear off.

112 146

2

Refit the cables on the unit injector. Their
relative position is not important. Use
torque screwdriver 588 179 to tighten the
screws to 2 Nm.

588 179

111 688

2 Nm

3

Fit the bearing bracket and torque tighten
the bolts to 105 Nm.

IMPORTANT! Make sure the pushrods are
positioned correctly. Refer to the illustration.

4

Refit the rocker arm shaft. Screw in the
bolts alternately so that they are tightened in
parallel or one of the bolts may bend.
Torque tighten the bolts to 105 Nm.

5

Check the valve clearance and unit injector
setting as described in Adjusting the valve
clearance and unit injector.

6

Refit the upper part of the rocker cover.
Torque tighten the screws to 18 Nm.

115 633

Cylinder head

26

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Cylinder head

Removing

Special tools

1

Open the bleed nipple on the fuel filter and
empty the fuel system by opening and
connecting a hose to the unions on the rear
edge of the fuel manifolds.

!

WARNING!

The fuel system must be empty or fuel
may run down into the cylinders, which
will result in a great risk of liquid
hammering.

If fuel runs into the combustion
chamber, it must be removed
immediately using a pump.

2

Remove the inlet pipe between the air filter
and the turbocharger.

Number

Designation

Illustration

Tool board

87 596

Slide hammer

D 2

87 596

00

1610

2

3

115 787

Removing cylinder head 1-2:

3

Remove the control unit cooler with control
unit and fuel filter.

Cylinder head

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Removing cylinder head 3-4:

4

Remove the crankcase ventilation unit.

Removing cylinder head 5-8:

5

Detach the inlet pipe for the crankcase
ventilation filter.

6

Detach the connection pipe between the
intake manifolds on the left-hand side.

7

Remove the charge air pipe between the
turbocharger and the charge air cooler.

4

7 6

5

115 788

Removing cylinder head 1-8, continued:

8

Detach the intake manifold and fuel
manifold from the cylinder head or cylinder
heads to be removed.

If cylinder head 5-8, all on the left-hand side
must be removed. Disconnect the AC
compressor and place it to one side. Remove
the intake manifold and fuel manifold.

If cylinder head 1-4, all on the right-hand
side must be removed. Detach the inlet pipe
to the crankcase ventilation and remove the
intake manifold and fuel manifold.

9

Remove the cooling system ventilation pipe.

114 727

9

Cylinder head

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10 Remove the exhaust manifolds.

11 Remove the top part of the rocker cover.

Note: All the valve mechanism components
must be refitted in their original positions.
Therefore, mark the parts as they are removed.

12 Relieve the pressure from the valves by

undoing the bolts on the rocker arm shaft
alternately.

!

WARNING!

Do not lean over the engine when
removing the rocker arm shaft. The unit
injector spring is pre-tensioned and can
come loose, causing personal injury.

Note: If the spring comes loose from the unit
injector, the unit injector must be renewed.

13 Remove the rocker arm shaft.

111

689

111

68

4

13

Cylinder head