Operation CHARM: Car repair manuals for everyone.

Heater Control Valve: Service and Repair

Water Control Valve

RENEW





- Remove the engine coolant filter and header tank caps, then open the radiator drain tap.
- Allow the coolant to drain from the system.
- Slacken the securing clip on the water valve to cylinder head hose and disconnect the water valve from the hose(1).
- Disconnect the vacuum hose from the water valve (2).
- Reposition the valve for access to the water valve to heater hose clip.
- Slacken the clip and remove the water valve (3).
- On refitting, ensure the cooling system is refilled with coolant to the correct specification.