48 © Scania Industrial & Marine Engines 2003-10:1
23. Every 2400 hours:
CHECKING/ADJUSTING
VALVE CLEARANCES
Note: Checking/adjusting valve clearances should also be done after the
first 400 hours of operation.
Valve clearances should be adjusted when the engine is cold, at least 30
minutes after running.
The rocker cover gaskets should be changed as necessary. Tightening torque:
26 Nm.
Intake valve clearance: 0.45 mm.
Exhaust valve clearance: 0.80 mm.
Alternative 1
- Set No. 1 cylinder to TDC by turning the engine in its direction of
rotation until all four valves are closed.
- Adjust the following valves. Correct valve clearances are also given on
the instruction plate on one of the rocker covers:
- Set No. 6 cylinder to TDC by turning the engine one revolution in its
direction of rotation and adjust the following valves:
Cylinder 1 Intake and outlet
2 Intake
3 Outlet
4 Intake
5 Outlet
Cylinder 2 Outlet
3 Intake
4 Outlet
5 Intake
6 Intake and outlet
TDC
no. 6 cylinder
TDC
no. 1 cylinder
Intake valve
Exhaust valve
5
4
3
2
1
6
Cylinder numbering
FLYWHEEL
FLYWHEEL
WARNING
Immobilise the starting device
when working on the engine.
If the engine starts out of
control, there is a
SERIOUS RISK
OF INJURY.
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