Scania 16 litre engine. Work Description — part 32

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125

Radial play

1

Measure the play at the turbine wheel as
well as at the compressor wheel.

100703

2

Place the tip of the dial gauge against the
turbine or compressor wheel.

3

Pull up both ends of the shaft. Take a
reading.

4

Press down both ends of the shaft. Take a
reading. The difference between the two
readings is the radial play.

1

00

7

0

4

5

Repeat the test three times on each side.

6

If any of the wheels makes contact with the
housing despite the radial play being within
tolerances, the turbocharger must be
renewed.

Axial play

1

Place the tip of the dial gauge against the
end of the shaft.

2

Press the shaft longitudinally to and fro and
take a reading at the end positions. The
difference between the readings is the axial
play.

3

Repeat the test three times.

1

00

7

05

Turbocharger

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0130w13b.mkr

Checking wastegate valve function

Special tools

The function of the wastegate valve is to reduce
the pressure so that the max. speed of the
turbocharger is not exceeded.

Note: The wastegate valve can withstand a
maximum pressure of 3 bar. Tool 99 405
delivers a maximum pressure of 2.5 bar.

1

Detach the hose 1 from the union on the
turbocharger and connect tool 99 405 as
illustrated. Fit a hose clamp 3.

2

Pressurise the wastegate valve with
compressed air by pressing the handle on
the tool. Relieve the pressure by pressing on
the screw 2.

3

Repeat the process a few times and check
that the shaft moves and listen for leaks
from the wastegate valve.

Number

Designation

Illustration

Tool board

99 405

Tool kit

99 405

115

550

11

6

22

6

2

1

99 405

3

Turbocharger

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127

Checks after breakdown

Tightening torques

Description

IMPORTANT! Observe strict cleanliness at all
times when working on the turbocharger. Never
leave connections for the oil inlet or outlet
unprotected. Foreign bodies in the bearing
housing will soon lead to total breakdown.

1

Make sure leaks or loose particles do not
occur in the line between the air filter and
the turbocharger.

2

Check that there are no loose particles in the
exhaust or intake manifolds. Renew the
charge air cooler.

3

Make sure all valves are intact.

4

Check that the oil return pipe from the
turbocharger is not blocked or deformed.

5

Check that the oil delivery pipe to the
turbocharger is not blocked, deformed or
leaking under pressure.

6

Renew the oil filter and clean the lubrication
system.

Bolts, turbocharger – exhaust pipe

63 Nm

V-clamps, M6

8 Nm

V-clamps, M8

20 Nm

Turbocharger

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