Gilera Nexus 500 Workshop Manual page 138

Engine
- Remove the coolant temperature sensor.
N.B.
THE SENSOR CONTROLS BOTH INJECTION
AND THE ANALOGUE INSTRUMENT ON THE
PANEL. TO CHECK THIS COMPONENT, SEE
THE INJECTION CHAPTER.
- Remove the 2 fastening nuts on the head, on the
exhaust and on the intake side.
- Remove the two M6 screws into the distribution
channel and the M6 screw on the spark plug side
with the thermostat support.
N.B.
THE HEAD MAY BE REMOVED WITH THE CAMSHAFT, ROCKING LEVER PINS AND FITTING
BRACKET IF NECESSARY.
- Loosen the 4 head-cylinder fastening nuts in 2 or
3 times and in a crossed sequence.
- Remove the head, the 2 centring dowels, the
gasket and the lower chain guide sliding block.
N.B.
DO NOT REMOVE THE DOWELS IF THEY ARE
FORCED INTO THEIR SEAT.
CAUTION
WHEN YOU HAVE TO REMOVE THE HEAD, PREPARE A SUITABLE CONTAINER SINCE THE
THERMAL UNIT CONTAINS COOLANT.
ENG - 56
Nexus 500