22 © Scania Industrial & Marine Engines 1997-11:2
7. Every 4,800 hours:
CLEANING COOLING SYSTEM
Note! If necessary, the cooling system should be cleaned more often.
External cleaning
Radiator
- Check that the radiator is not blocked on the air side and that the fins are
not damaged.
- Carefully scrape the deposit away from the radiator fins. If necessary a
paraffin-based engine cleaner may be used.
- Bent fins can be carefully straightened, e.g. using a steel wire brush.
Charge air cooler (DSI engine)
1. Drain the coolant from the engine, see “Changing coolant”.
2. Detach the upper part of the intake manifold.
3. Detach the charge air cooler hose and pipe connections.
4. Dismantle the charge air cooler as illustrated.
Take care not to damage the element’s water connections.
5. Clean the outside of the element. This is especially important if the
engine is equipped with closed crankcase ventilation. Use a paraffin-
based engine cleaner.
6. Assemble the charge air cooler. Change all seals and gaskets.
7. Refit hose and pipe connections.
8. Fill coolant as described on page 19.
9. Connect the intake manifold from the turbo.
1. Intake manifold, lower
part
2. Gasket
3. Radiator element
4. Gasket
5. Intake manifold, upper
part
The cooling system must not
be cleaned using caustic soda.
Risk of damaging
aluminium parts.
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