Note: Suitable jointing compound will be required on refitting.

Removal
1 With the engine cold unscrew the pressure cap on the thermostat housing or expansion tank as applicable, then refit it. This will release any residual pressure in the system and minimise coolant loss when the sender unit is removed.

2 Disconnect the wiring and unscrew the sender unit located on the forward facing side of the cylinder head, below the thermostat housing on OHV engines, or adjacent to the thermostat housing on CVH engines (see illustrations).

7.2a Temperature gauge sender unit location in cylinder head - OHV engines

7.2b Temperature gauge sender unit location in cylinder head - CVH engines

Refitting 3 To refit, smear the threads of the sender unit with jointing compound and screw it into the cylinder head securely.

4 Reconnect the wiring and top-up the cooling system as described in Chapter 1.