PIAGGIO 2005 XEVO 400ie, Workshop Manual

Page: 301 / 376

Flywheel cover
Thermostat
Check
Before proceeding to disassemble, carry out a few
checks:
- Connect the diagnostic tester and select the «PA-
RAMETERS» function (see Injection chapter).
- Start the cold engine and let it warm up.
- Manually check the moment when there is a sud-
den increase in temperature at the output of the
radiator cold box.
N.B.
THERE SHOULD BE A SLIGHT AND GRADUAL HEATING
CAUSED BY A SMALL PASSAGE ON THE THERMOSTAT
TO THE OFF POSITION.
Specific tooling
020680Y Diagnosis Tool
- Check the temperature read by the diagnostic
tester.
Thermostat opening starts: approx. 80°C
- If opening occurs at different temperatures,
check the thermostat.
- Remove the thermostat as described in the fly-
wheel cover paragraph.
- Visually check that the thermostat exhibits no
mechanical faults.
- Prepare a metal container with approx. 1 litre of
water.
- Immerse the thermostat, keeping it in the centre
of the container.
- Immerse the multimeter temperature probe close
to the thermostat.
- Warm up the container using the heat gun.
- Heat the water and periodically pull the thermostat out until its opening becomes visible.
- Insert a thin copper wire between the seat and the thermostat closing plate.
- Keep the wire into position until locking up is perceived.
XEVO 400ie
Cooling system
COOL SYS - 301