1997-11:2 © Scania Industrial & Marine Engines 23
Internal cleaning
Removing oils and greases
- If possible, run the engine until it is warm and then drain the cooling
system.
- Remove the thermostats.
- Fill the system with clean, hot water mixed with liquid dishwasher
detergent designed for household machines.
Mix 1% (0.1/10 l).
- Run the engine until warm (about 20 or 30 minutes). Do not forget any
cab heating system.
- 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.
- Fill the system with coolant as described in the specifications on
page 19.
Removing deposits
- If possible, run the engine until it is warm and then drain the cooling
system.
- Remove the thermostats.
- Fill the system with clean, hot water mixed with one of the commer-
cially available radiator cleaners based on sulphamin acid and contain-
ing dispersing agents. Follow the manufacturer’s instructions for mix
ratios and cleaning times.
- Run the engine for the for the specified time and then drain the cooling
system.
- Fill the system again with hot water and run the engine for about 20 or
30 minutes.
- Drain the water from the system.
- Refit the thermostats.
- Fill the system with coolant as described in the specifications on
page 19.
WARNING
When handling cleaners for
the cooling system:
Study the warning on the
packaging.
!
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