Scania DC12 - Internal Cleaning of Cooling System; Removing Oil and Grease; Removing Deposits

© Scania CV 2009 41
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 35.
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 some of the radiator
cleaning agent available on the market which is based on sulphamic acid
and contains dispersing agents. Follow the manufacturer’s instructions
for the concentration and cleaning period.
- 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 coolant according to the specification on
page 35.
When handling cooling system
detergent:
read the warning text on the
containers.
Use a container to avoid spills
when changing the coolant.
Dispose of used coolant through
an authorised waste disposal
contractor.
WARNING
!
Help protect our
environment!