VESPA GTV 250 i.e. 2008 Service Station Manual page 238

Cooling system
System bleed
- Start up the engine until the operating tempera-
ture is reached.
- Remove the rubber hood over the bleed valve
- Obtain a rubber tube that is of the right length to
connect the valve to the expansion tank
- Place one end of the pipe on the bleed valve and
the other in the expansion tank
- Loosen the screw by two turns until the commu-
nication hole is revealed with the head as shown
in the picture
- Wait until only coolant comes out of the rubber
pipe so as to eliminate any air bubbles inside the
circuit.
- Tighten the bleed valve respecting the maximum
torque.
COOL SYS - 238
Vespa GTV 250 i.e.