Scania 16 litre engine. Work Description — part 6

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21

Renewing the upper rocker cover gasket

Removing

1

Clean around the rocker cover.

2

Remove the top part of the rocker cover.

3

Renew the rocker cover gasket.

Fitting

Tightening torques

1

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

Screws for upper rocker cover

18 Nm

111

68

2

18 Nm

Cylinder head

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Renewing the lower rocker cover gasket

Removing

1

Clean around the rocker cover.

2

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.

3

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 shaft with rocker arms. 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.

111

689

Cylinder head

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4

Remove the rocker arm shaft.

4

11

5

2

30

5

Remove the bearing bracket.

6

Detach the cables on the unit injector. The
screws cannot be removed but unscrew them
as much as possible.

7

Remove the lower rocker cover.

6

5

7

115 231

8

Renew the lower rocker cover gasket.

111 686

Cylinder head

24

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Fitting

Tightening torques

Tools

Cable connection, unit injector

2 +/-0.2 Nm

Bearing bracket and rocker arm shaft

105 Nm

Upper rocker cover

18 Nm

Lower rocker cover

26 Nm

Number

Designation

Illustration

588 179

Torque screwdriver

12

104

588 179

1

Fit the lower rocker cover. Torque tighten
the screws to 26 Nm.

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

Cylinder head