Mitsubishi SL-Series Operation Manual page 30

MAINTENANCE
3. Open the radiator drain valve and remove the
engine drain plug.
Water drain cock
4. Then allow the coolant to drain into the
containers.
6.6.3 Flushing
1. Close the radiator drain valve and install the
engine drain plug.
2. Fill the cooling system with a cleaning solution
which does not chemically attack rubber or
metal surfaces. Start and operate the engine
at 800 to 900 rpm and let the engine run for 15
minutes. Stop the engine and drain the
cleaning solution.
3. Fill the system with clean water and operate
the engine at 800 to 900 rpm for 10 minutes.
Continue to flush the system until the draining
water is clear.
6.6.4 Refilling
1. Tighten the radiator drain valve and the
engine drain plug.
2. Remove the by-pass hose (A) at the
thermostat housing.
3. Remove the cabin heater hose (B) at the
thermostat housing (if installed).
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4. Pour pure, undiluted LLC into the radiator; see
COOLANT AND ANTIFREEZE
SPECIFICATIONS on page 36. The
recommended concentration of LLC is
illustrated in the chart below:
Ambient
Temperature, °C (°F)
LLC concentration, %
Table 7 Recommended LLC Concentrations
(reference)
5. Fill the cooling system slowly with coolant
through the radiator cap opening to avoid air
being trapped in the system.
ENGLISH Operation Manual Mitsubishi SL-Series diesel engines
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Version 08/2004
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