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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.
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