Step 1. Place the heater con- trol to hot’, orfully open the cylinder head water valve to prevent air locks. If the anti- freeze is to be re-used, an old bowl will catch the coolant.

2. Remove the radiator cap or plug slowly, using a large pad of folded cloth to protect your hands if the system is hot. Undo any air bleed valves (but do not remove them).

3. Open the radiator drain plug or tap, if fitted, and the plug or tap on the cylinder block—the handbook will show its location. If there is no radiator plug Tools: Screwdriver; span- or drain tap, disconnect the ner i hoses need removal; bottom hose to let the water out.

4. If water trickles slowly from a tap or plug, it is probably blocked bysedimentwhich can be dislodged by prodding with a piece of wire.