Engine Cooling; Adding Coolant And Bleeding Air From The System; Water Pump - PIAGGIO 500 cc Service Manual

Engine cooling

Adding coolant and bleeding air from the system.

The level of the fluid must be checked every 6,000 km
when the engine is cold.
Follow these steps:
- Put the vehicle on the central stand on level ground.
- Remove the expansion tank cap and top up if the
coolant is below or near the MIN level in the expansion
tank. The level of the fluid should always be between
the MIN and MAX marks.
- To have an indication of the coolant level, refer to the
groove in the plastic strip that can be seen through the
coolant filler hole. The upper and lower parts of the
groove correspond to the MAX and MIN levels re-
spectively.
- The coolant consists of a 50 percent mixture of
demineralized water and antifreeze solution with a
base of ethylene glycol and corrosion inhibitors.
Total coolant capacity: ~ 1.8 lt
- To check the presence of air in the circuit follow the
procedure described in Chapter 11 - Cooling.
- Switch off the engine and allow it to cool down. After
a few minutes, remove the expansion tank cap and
check the level of the fluid.
- If necessary, top up by pouring fresh coolant into the
expansion tank up to the correct level.
Warning
- To prevent the coolant from leaking out
of the expansion tank during use, be sure to never
exceed the MAX level when refilling.

Water pump

If the water pump becomes noisy or liquid leaks through
the pump drain hole, check the water pump as de-
scribed in Chapter 5-Flywheel cover. Follow these
steps:
- Put the vehicle on the central stand on level ground.
- Remove the lower right-hand side panel and the
right-hand footboard as described in Chapter 8-
Bodywork of the X9- 500 cc manual;
- Remove the sleeves from the water pump cover and
the filler cap from the expansion tank and empty the
cooling circuit.
- Drain the cooling system by removing the sleeves
located on the water pump cover and the plug located
on the expansion tank.
Warning
- Perform the operation when the engine
is cold.
- Remove the water pump cover shown in the figure
after loosening the six fixing screws.
- Cooling circuit capacity: ~ 1.8 lt.
- As described in Chapter 5-Engine of the X9 500cc
manual, partially drain the system and overhaul the
pump.
General information and Maintenance
- After solving the problem and refitting all components,
fill and bleed the cooling circuit again.
N.B.: Change the coolant as described in Chapter 11-
Cooling.
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