2003-10:1 © Scania Industrial & Marine Engines 37
Internal cleaning
Removing oil and grease
- If possible, run the engine until it has reached operating temperature and
then drain the cooling system.
- Remove the thermostats.
- Fill the system with clean, hot water mixed with liquid dishwasher
detergent designed for household use.
Concentration 1% (0.1/10 l).
- Run the engine until warm for about 20-30 minutes. Do not forget the
cab heating system (if fitted).
- Drain the cooling system.
- Fill the system again using clean, hot water and run the engine for about
20-30 minutes.
- Drain the water from the system.
- Refit the thermostats.
- Top up the system with new coolant according to the specification on
page 33.
Removing deposits
- If possible, run the engine until it has reached operating temperature and
then drain the cooling system.
- Remove the thermostats.
- Fill the system with clean, hot water mixed with one of the
commercially available radiator cleaners based on sulphamic acid and
containing dispersing agents. Follow the manufacturer's instructions for
mixing proportions and cleaning times.
- Run the engine for the specified time and then drain the cooling system.
- Refill the system with hot water and run the engine for about 20-30
minutes.
- Drain the water from the system.
- Refit the thermostats.
- Top up the system with new coolant according to the specification on
page 33.
Handling cleaning agents for
the cooling system:
Read the warning label on the
container.
Use a collecting vessel in order
to avoid spillages when
changing the coolant.
Dispose of used coolant through
an authorised waste disposal
contractor.
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