Scania 16 litre engine. Work Description - part 32

0130w13b.mkr

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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

126

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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

0130w13b.mkr

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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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