35
Draining, Flushing and Filling the Cooling System
WARNING: NEVER REMOVE THE PRESSURE
RELIEF CAP WHILE THE ENGINE IS
OPERATING OR WHEN THE COOLING
SYSTEM IS HOT. MAY CAUSE PERSONAL
INJURY OR DAMAGE TO COOLING SYSTEM
OR ENGINE. TO REDUCE THE RISK OF
HAVING SCALDING HOT COOLANT OR
STEAM BLOW OUT OF THE DEGAS BOTTLE
WHEN REMOVING THE PRESSURE RELIEF
CAP, WAIT UNTIL THE ENGINE HAS COOLED
DOWN TO AT LEAST 40°C (110°F).
1. Wrap a thick cloth around the pressure relief cap and turn it slowly one-half turn
counterclockwise. Stepping back while the pressure is released from the
cooling system.
2. When you are sure all the pressure has been released, (still with a cloth) turn
counterclockwise and remove the pressure relief cap.
3. Remove the radiator expansion/ degas tank filler cap, then open the radiator
drain cock, where fitted, or detach the bottom radiator hose.
4. Flush the system with water using a hose until clean water emerges and allow
all water to drain out. Close the drain cock (or replace the bottom radiator hose).
Recover all old antifreeze and dispose of properly. Contact your local municipal
government for the proper disposal.
5. Fill the system with the correct coolant mixture via the expansion/degas tank
filler neck. Fill the system slowly, to avoid air locks, up to the ‘maximum’ mark
on the degas tank.
6. Run engine and check hose connections for leaks. Check, and, if necessary,
top up the coolant in the radiator or degas tank.
Engine Lubrication System
The lubrication system should be maintained regularly -- Refer to
“RECOMMENDED MAINTENANCE SCHEDULES” on page 21, with the correct
grade of lubricant as specified in the maintenance summary -- Refer to
“Recommended Lubricants” on page 22. The system is of the force feed type, the
lubricating oil being circulated to the engine bearings under pressure by an oil
pump driven from the camshaft drive belt.
The dipstick provides some guide to the condition of the oil. An additive type of oil
keeps soot in suspension, and even a small amount of soot causes the oil to
darken rapidly.
However, if the dipstick is found to be heavily coated with sludge, then obviously
the oil should be changed.
Radiator Drain Cock
FPP01111
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