40 © Scania CV 2009
7. Every 4,800 hours:
Cleaning the cooling system
Note: If necessary, the cooling system should be cleaned more often.
External cleaning
Radiator
- Check that the radiator is not clogged on the air side and that the cooling
fins are not damaged.
- Carefully scrape the deposit off the radiator’s cooling fins. If necessary,
a paraffin-based engine cleaner can be used.
- Bent fins can be straightened using a wire brush, for example, and
exercising care.
Charge air cooler, DI engine
1. Drain the coolant from the engine, see "Changing the coolant".
2. Detach the intake manifold from the turbo.
3. Detach the charge air cooler’s inlet and outlet connections.
4. Unbolt the charge air cooling package from the intake manifold. The
charge air element is integrated into the housing.
Take care not to damage the element’s water connections.
5. Clean the outside of the core. This is especially important if the engine is
equipped with closed crankcase ventilation. Use a paraffin-based engine
cleaner.
6. Clean and degrease the sealing surfaces on the element and on the intake
manifold with a spirit-based cleaning agent.
7. Apply a smooth bead of sealing agent (silicone 816 064), approximately
2-3 mm, onto the intake manifold sealing surface.
8. Assemble the charge air cooler within 15 minutes of applying the
sealant. Tighten the bolts to 26 Nm.
9. Refit the inlet and outlet connections with new
O-rings.
10. Refit the delivery pipe clamps.
11. Connect the intake manifold from the turbo.
12. Fill up with coolant according to the
specification on page 35.
Important! Let the sealing compound harden
for at least 24 hours before the
engine is used again.
1. Charge air
cooler element
2. O-ring
3. Sealant 816 064
4. Intake manifold
1
2
3
4
The cooling system must never
be cleaned with caustic soda.
There is a risk of damage to
aluminium parts.
Important
!
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