PIAGGIO 2005 XEVO 400ie, Руководство по ремонту

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- Let water and thermostat cool down.
- Progressively heat the water keeping the thermostat immersed by the wire.
- Check the opening temperature when the thermostat is released from the wire.
Opening starts temperature approx. 82° C
Specific tooling
020331Y Digital multimeter
020151Y Air heater
- Heat up until the thermostat is completely open:
N.B.
HEATING SHOULD BE GRADUAL.
N.B.
AVOID CONTACT BETWEEN THERMOSTAT AND CONTAINER FOR A CORRECT TEST PER-
FORMANCE.
- If incorrect values are detected, replace the ther-
mostat.
- Repeat the filling and bleeding procedure.
diagnosis
Excessive system pressure
1 - Check the expansion tank cap efficiency.
N.B.
THE CAP IS EQUIPPED WITH A PRESSURE-RELIEF VALVE CALIBRATED AT 0.9 BAR.
There is also a valve that must allow air inlet during the cooling step.
YES go to 2 NO go to 3
2 - Check the head gasket seal (see «Thermal group and timing system» chapter)
3 - Replace the cap.
Cooling fluid consumption
1 - Check the system outer seals as described above.
YES go to 2 NO go to 3
2 - Check the head gasket seal (see «Thermal group and timing system» chapter)
- If water leaks are detected in the engine oil, inspect the pad on the head cooling circuit.
Cooling system
XEVO 400ie
COOL SYS - 302